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  • Articles  (123)
  • Woods Hole Oceanographic Institution  (76)
  • Wiley  (33)
  • Oxford University Press  (14)
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  • 1
    Publication Date: 2022-03-11
    Description: As the Arctic coast erodes, it drains thermokarst lakes, transforming them into lagoons and, eventually, integrates them into subsea permafrost. Lagoons represent the first stage of a thermokarst lake transition to a marine setting and possibly more saline and colder upper boundary conditions. In this research, borehole data, electrical resistivity surveying, and modelling of heat and salt diffusion were carried out at Polar Fox Lagoon on the Bykovsky Peninsula, Siberia. Polar Fox Lagoon is a seasonally isolated water body connected to Tiksi Bay through a channel, leading to hypersaline waters under the ice cover. The boreholes in the centre of the lagoon revealed floating ice and a saline cryotic bed underlain by a saline cryotic talik, a thin ice‐bearing permafrost layer, and unfrozen ground. The bathymetry showed that most of the lagoon was ice‐grounded in spring. In bedfast ice areas, the electrical resistivity profiles suggest that an unfrozen saline layer was underlain by a thick layer of refrozen talik. The modelling suggests thermokarst lake taliks refreeze when submerged in saltwater with mean annual bottom water temperatures below or slightly above 0 °C. This occurs, because the top‐down chemical degradation of newly formed ice‐bearing permafrost is slower than the cooling of the talik. Hence, lagoons may pre‐condition taliks with a layer of ice‐bearing permafrost before encroachment by the sea and this frozen layer may act as a cap on gas migration out of the underlying talik.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev , info:eu-repo/semantics/article
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  • 2
    Publication Date: 2022-05-25
    Description: Digital computing techniques have been used in special computing applications in underwater acoustics at WHOI for many years, but recently we have commenced intensive application of digital data handling and computing facilities to a variety of computing, data storage, and data handling problems. Progress in these applications is described under Acoustic Instrumentation below. Some bathymetric studies carried out recently under another contract have shown that even very narrow-beam, single-beam echo sounders simply cannot provide reliable depth sounding information where the topography is complex. In this work we have been experimenting with the inverted echo sounder, discussed below, originally developed to measure depth of the sound velocimeter. The inverted echo sounder is lowered to a position within a few feet of the bottom. The total acoustic travel time from surface to bottom may be read as the sum of the travel times from the instrument to the bottom and surface . True depth is then computed in the usual way with appropriate s cnmd velocity data. In its present form the inverted echo sounder is suitable for mapping ~mall areas~ a few square miles, provided there is a suitable means of positioning the instrument. We have experimented with radio-acoustic navigation, and intend to experiment with vertical triangulation from the suspending ship as well. Steady demands for new, modified, and improved instrumentation have been responded to in echo sounding, seismic profiling, and spectrum analysis, as detailed below.
    Description: Undersea Warfare Branch Office of Naval Research Under Contracts Nonr-1367(00)NR261-102 and Nonr-2129(00)NR261-104
    Keywords: Underwater acoustics ; Oceanographic instruments
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 3
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-25
    Description: Also published as: Deep-Sea Research 12 (1965): 805-814
    Description: Long-term current measurements at depths of 50 and 100m obtained with Richardson current meters at two deep-water moorings south of Bermuda are reported. The records are dominated by anticyclonic rotations which appear and degenerate, possibly in response to the passage of storms. Spectral analysis of the records indicates that this motion has a period of 24 hours at a depth of 50 m, and 25·3 hours at a depth of 100m. No explanation is given to account for this difference in period over a 50-m separation. Both records indicate the existence of semidiurnal tidal motion. The long-term motions at both depths indicate a systematic change in the net direction of flow over a three-month period.
    Description: The Office of Naval Research under Contract Nonr-2196(00) NR 083-004.
    Keywords: Ocean currents--Measurement ; Ocean-atmosphere interaction ; Sargasso Sea
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 4
    Publication Date: 2022-05-25
    Description: The Woods Hole Oceanographic Institution (WHOI) Hawaii Ocean Time-series Station (WHOTS), located approximately 100 km north of Oahu, Hawaii, is intended to provide long-term, high-quality air-sea fluxes as a part of the NOAA Climate Observation Program. The WHOTS mooring also serves as a coordinated part of the Hawaii Ocean Time-series (HOT) program, contributing to the goals of observing heat, fresh water and chemical fluxes at a site representative of the oligotrophic North Pacific Ocean. The approach is to maintain a surface mooring instrumented for meteorological and oceanographic measurements at a site near 22.75°N, 158°W by successive mooring turnarounds. These observations are used to investigate air–sea interaction processes related to climate variability. This report documents recovery of the thirteenth WHOTS mooring (WHOTS-13) and deployment of the fourteenth mooring (WHOTS-14). Both moorings used Surlyn foam buoys as the surface element and were outfitted with two Air–Sea Interaction Meteorology (ASIMET) systems. Each ASIMET system measures, records, and transmits via Argos and Iridium satellite the surface meteorological variables necessary to compute air–sea fluxes of heat, moisture and momentum. The upper 155 m of the moorings were outfitted with oceanographic sensors for the measurement of temperature, conductivity and velocity in a cooperative effort with Dr. Roger Lukas of the University of Hawaii. A pCO2 system and ancillary sensors were installed on the buoys in cooperation with Adrienne J. Sutton at the Pacific Marine Environmental Laboratory. The WHOTS mooring turnaround was conducted on the NOAA ship Hi’ialakai (R/V HA). Operations were a joint effort undertaken by the Upper Ocean Processes group (UOP) of the Woods Hole Oceanographic Institution (WHOI), the University of Hawaii’s (UH) Hawaii Ocean Time-series group (HOT), and the able-bodied crew of R/V HA. The cruise took place between 25 July and August 3 2017. Operations began with deployment of the WHOTS-14 mooring on 27 July. This was followed by a period of intercomparison, where meteorological measurements and CTDs were collected at both the W13 and W14 stations. Recovery of the WHOTS-13 mooring took place on 31 July. This report details the in-port operations, pre-cruise buoy preparations, cruise operations and data collected.
    Description: Funding was provided by the National Oceanic and Atmospheric Administration under Grant No. NA14OAR4320158 and the Cooperative Institute for the North Atlantic Region (CINAR).
    Keywords: Hydrography--North Pacific Ocean--Observations ; Oceanographic instruments--North Pacific Ocean--Observations
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 5
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-25
    Description: Also published as: 1967 NEREM record : Institute of Electrical and Electronics Engineers 9 (1967): 196-197
    Description: THIS PAPER DESCRIBES the equipments used to establish the relative position of ALVIN from her mother ship, the R/V LULU. Operating procedures used at sea are also discussed. A recent review within the Deep Submergence Research Vehicle Program at WHOI established a set of conclusions and guidelines, for internal use, governing the ALVIN locating equipments and procedures.
    Description: The Office of Naval Research under Contract Nonr- 3484(00).
    Keywords: Underwater navigation
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 6
    Publication Date: 2022-05-25
    Description: Workshop held November 21, 2019, Woods Hole Oceanographic Institution, Woods Hole, MA
    Description: Real-time autonomous Passive Acoustic Monitoring systems (real-time PAMS) have the ability to detect marine mammal species, including the North Atlantic Right Whale, and provide notification of their presence. This workshop, held at the Woods Hole Oceanographic Institution (WHOI) on November 21st, 2019, sought to develop an initial framework for creating equipment and performance standards that could be used to benchmark all real-time PAMS as well as data standards that ensure system interoperability. Forty attendees were present, spanning industry, regulatory, scientific, and conservation stakeholder groups. Through presentations and breakout sessions, the group identified and discussed the potential abilities of real-time PAMS to improve situational awareness during wind energy development activities, the types of implementations that are possible in the coming years, and the roadblocks preventing near-term, widespread use of this technology as a risk mitigation solution. Participants agreed that real-time autonomous PAMS hold tremendous promise for reducing the potential risk associated with development activities while at the same time allowing more flexibility to developers. Successful implementation of real-time PAMS for offshore wind energy use was seen as possible now based on existing technology. Workshop attendees identified a number next steps that would further the effectiveness of real-time PAMS within the offshore wind energy industry. However, the lack of a regulatory process for defining the sensing requirements for a particular implementation, as well as the dynamic operational framework within which real-time PAMS would be used were seen as the biggest challenges to effective near-term use.
    Description: Workshop Sponsors: Woods Hole Oceanographic Institution and POWER-US
    Repository Name: Woods Hole Open Access Server
    Type: Working Paper
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  • 7
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-25
    Description: The second half of CHAIN Cruise #11, 22 February until 22 March, 1960, is detailed as to type of measurements made with their specific locations. The cruise areas were in the St. Croix region, the Puerto' Rico Trench and the tracks from the Bahamas to Bermuda to Woods Hole. Camera lowerings, lowerings of the thermal probe and accompanying cores, dredging, sound velocimeter lowerings, and acoustic studies of the scattering layer were the special events undertaken while precision bathymetry and towing of the Continuous Temperature Recording Chain were on a watch standing basis.
    Description: Undersea Warfare Branch, Office of Naval Research Under Contract Nonr- 1367(00) (NR- 261-10 2)
    Keywords: Underwater photography ; Submarine topography ; Marine sediments
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 8
    Publication Date: 2022-05-25
    Description: A mathematical model, consistent with certain physical features of ocean waves may be constructed by superposition of long crested sinusoidal gravity waves. Such a model, as proposed by Pierson (1955) and Longuet-Higgins (1957), depends upon the random superposition of the component waves, so that the interpretation of ocean wave measurements must be regarded as a statistical problem. Barber (1958) has suggested that measurement of sea surface elevation as a function of time at several points along a line array may be used to deduce the distribution of energy with regard to frequency and direction of the component gravity waves. In fact, by preserving the time relationship among the signals from several detectors in a line array , the array need not be physically rotated to examine component gravity waves coming from various directions. After developing the physical basis and mathematical notation for a stochastic model of ocean waves the limitations and potential errors in the measurement and calculation of directional spectra from finite and discrete data are discussed. Finally, some directional spectra calculated from measurements of wind generated waves in Buzzards Bay, Massachusetts are presented without attempting interpretation.
    Description: This research was supported in part by the Bureau of Ships Fundamental Hydromechanics Research Program, S-R009 01 01, administered by the David Taylor Model Basin and the Office of Naval Research Under Contract Nonr-3351(00) NR 083- 501 and Nonr 2734(00) NR 083-143.
    Keywords: Ocean waves--Mathematical models
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 9
    Publication Date: 2022-05-25
    Description: This i s a status report for the period 1 May 1966 to 31 October 1966 for Contract Nonr - 4029 with the Office of Naval Research. Subjects of this contract are in Oceanic Acoustics, Physical Oceanography, Sea Floor Properties and Advisory Activities. Preliminary results of a cruise by CHAIN to the Mediterranean and the Red Sea during the summer of 1966 are given. Sound-velocity and temperature structure south of Bermuda as observed from ATLANTIS II (June, July 1966) are described. Continuing analysis of acoustical and geophysical data is discussed. Papers, reports, and technical memoranda written during this period are listed.
    Description: The Undersea Warfare Branch., Office of Naval Research., under Contract.Nonr-4029(00) NR 260-101.
    Keywords: Underwater acoustics
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 10
    Publication Date: 2022-05-25
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Romagnoni, G., Kvile, K. o., Dagestad, K., Eikeset, A. M., Kristiansen, T., Stenseth, N. C., & Langangen, O. Influence of larval transport and temperature on recruitment dynamics of North Sea cod (Gadus morhua) across spatial scales of observation. Fisheries Oceanography, (2020): 1-16, doi:10.1111/fog.12474.
    Description: The survival of fish eggs and larvae, and therefore recruitment success, can be critically affected by transport in ocean currents. Combining a model of early‐life stage dispersal with statistical stock–recruitment models, we investigated the role of larval transport for recruitment variability across spatial scales for the population complex of North Sea cod (Gadus morhua ). By using a coupled physical–biological model, we estimated the egg and larval transport over a 44‐year period. The oceanographic component of the model, capable of capturing the interannual variability of temperature and ocean current patterns, was coupled to the biological component, an individual‐based model (IBM) that simulated the cod eggs and larvae development and mortality. This study proposes a novel method to account for larval transport and success in stock–recruitment models: weighting the spawning stock biomass by retention rate and, in the case of multiple populations, their connectivity. Our method provides an estimate of the stock biomass contributing to recruitment and the effect of larval transport on recruitment variability. Our results indicate an effect, albeit small, in some populations at the local level. Including transport anomaly as an environmental covariate in traditional stock–recruitment models in turn captures recruitment variability at larger scales. Our study aims to quantify the role of larval transport for recruitment across spatial scales, and disentangle the roles of temperature and larval transport on effective connectivity between populations, thus informing about the potential impacts of climate change on the cod population structure in the North Sea.
    Description: G.R. was supported by the Norden Top‐level Research Initiative sub‐programme “Effect Studies and Adaptation to Climate Change” through the Nordic Centre for Research on Marine Ecosystems and Resources under Climate Change (NorMER). K.Ø.K. was supported by the WHOI John H. Steele Post‐doctoral Scholar award and VISTA – a basic research program in collaboration between The Norwegian Academy of Science and Letters, and Equinor. We thank an anonymous referee for valuable comments that substantially improved the article.
    Keywords: Atlantic cod ; biophysical model ; larval transport ; North Sea ; populations ; stock–recruitment ; temperature
    Repository Name: Woods Hole Open Access Server
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  • 11
    Publication Date: 2022-05-25
    Description: This is a report of the research program under contracts Nonr-4029 (1 May - 31 October 1963), and Nonr-3243 (1 May - 31 October 1963} . Both contracts are with the Office of Naval Research, Code 466. Contract Nonr-4029 is a continuation of Contract Nonr-1367. Under Contract Nonr-4029, ATLANTIS· II and CHAIN, in May and August, were employed in searching for the sunken submarine THRESHER by various means. Under the same contract, activities were devoted also to the development of systems or components of systems for search and for navigational control required in such operations. One system of submerged navigation was employed for locating suspended instruments by acoustic ranging from the ship. A second navigation system was also tested which depends on acoustic ranging either from the ship or from the suspended instrument to a hydrophone buoyed near the bottom. This hydrophone is connected to a radio link in a surface buoy. This system will be useful not only for navigation but also for bottom reflection studies. A program has been started to print and mount all photos taken by WHOI on the THRESHER search; it will be coordinated with other similar efforts in the continuing investigation of the disaster. Under Contracts Nonr-4029 and Nonr-3243 considerable progress has been made in other research, which is described in this report .
    Description: Submitted to Under sea Warfare Branch Office of Naval Research Under· Contracts Nonr- 4029(00)NR261-10 2 and Nonr- 3243(00) NR261-136
    Keywords: Submarine geology ; Underwater acoustics ; Oceanographic instruments
    Repository Name: Woods Hole Open Access Server
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  • 12
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-25
    Description: The report presented is the final one under Air Force Cambridge Research Center Contract 19(604)·2157 with the Woods Role Oceanographic Institution. The report covers a program of pendulum and gravimeter measurements conducted over the period 1950·1959. The original objective of the program was to establish a series of reliable gravity control measurements through the use of pendulums over a sufficient range of gravity to permit the calibration of geodetic gravimeters with an accuracy of one part in 5000 over a range of 5000 mgals and thus assure a potential accuracy of 1 mgal or better with such gravimeters on any global series of measurements. With time this objective was modified to include the establishment of pendulum gravity measurements outside of North America as there appeared to be no unanimity of international opinion regarding a gravity standard. A second objective of the program was to expand the gravity coverage and standardize existing gravity surveys within the United States so that reliable gravity anomaly maps could be prepared. A third objective was to strengthen and expand the world network of airport gravity bases established earlier under the auspices of the Office of Naval Research so that data in all parts of the world could be integrated onto the same datum and gravity standard. The report is subdivided on the basis of these objectives into three principal parts plus an introductory chapter giving the history o~ the program, and a final chapter presenting recommendations as to further work deemed desirable. Dr. J. C. Rose, who has been in charge of the pendulum program since its inception, prepared the second portion of the report, which deals with the pendulum measurements, and the writer prepared the remainder.
    Description: Work carried out under Contract AF19 (604)2157 with the Geophysics Research Directorate Air Force Cambridge Research Center Air Research and Development Command.
    Keywords: Gravity--Measurement
    Repository Name: Woods Hole Open Access Server
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  • 13
    Publication Date: 2022-05-25
    Description: This is a report of activities supported under Contract NObsr-72521 for the period 1 January through 31 March 1961. It also contains mention of other reports, papers, and undertakings of the submarine geophysics group (listed under "Personnel") which are believed to be of interest to the Bureau of Ships. During this period no cruises have been supported directly under this contract. Eight members of the group under the leadership of Dr. Voorhis have participated in a cruise of CHAIN to the Romanche Trench. Their principal objective was to determine the sill depth which controls the exchange of deep, cold water ,between the western and eastern sides of the Atlantic Ocean. This sill was previously identified from hydrographic evidence to lie somewhat east of the Romanche Trench. A second objective was to continue the observations of temperature structure near the sea's surface with the thermistor chain. Another group, under Mr. Baxter's leadership, continued a sound transmission study in the Bermuda area in support of Project ARTEMIS. A third group, under Dr. Hays's direction, commenced a finely detailed bathymetric survey of an area of special interest to Project ARTEMIS. In all three of these studies we are making use of one or more experimental techniques in the use of sonobuoys, underwater acoustic navigation for submerged instruments, and sound coherence studies which are planned for use eventually in sound transmission and bottom reflection research under this contract.
    Description: Bureau of Ships Under Contract NObsr-72521
    Keywords: Sonar ; Underwater acoustics ; Submarine geology
    Repository Name: Woods Hole Open Access Server
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  • 14
    Publication Date: 2022-05-25
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Carroll, E. L., Ott, P. H., McMillan, L. F., Galletti Vernazzani, B., Neveceralova, P., Vermeulen, E., Gaggiotti, O. E., Andriolo, A., Baker, C. S., Bamford, C., Best, P., Cabrera, E., Calderan, S., Chirife, A., Fewster, R. M., Flores, P. A. C., Frasier, T., Freitas, T. R. O., Groch, K., Hulva, P., Kennedy, A., Leaper, R., Leslie, M. S., Moore, M., Oliveira, L., Seger, J., Stepien, E. N., Valenzuela, L. O., Zerbini, A., & Jackson, J. A. Genetic diversity and connectivity of southern right whales (Eubalaena australis) found in the Brazil and Chile-Peru wintering grounds and the South Georgia (Islas Georgias del Sur) feeding ground. Journal of Heredity, 111(3), (2020): 263-276, doi:10.1093/jhered/esaa010.
    Description: As species recover from exploitation, continued assessments of connectivity and population structure are warranted to provide information for conservation and management. This is particularly true in species with high dispersal capacity, such as migratory whales, where patterns of connectivity could change rapidly. Here we build on a previous long-term, large-scale collaboration on southern right whales (Eubalaena australis) to combine new (nnew) and published (npub) mitochondrial (mtDNA) and microsatellite genetic data from all major wintering grounds and, uniquely, the South Georgia (Islas Georgias del Sur: SG) feeding grounds. Specifically, we include data from Argentina (npub mtDNA/microsatellite = 208/46), Brazil (nnew mtDNA/microsatellite = 50/50), South Africa (nnew mtDNA/microsatellite = 66/77, npub mtDNA/microsatellite = 350/47), Chile–Peru (nnew mtDNA/microsatellite = 1/1), the Indo-Pacific (npub mtDNA/microsatellite = 769/126), and SG (npub mtDNA/microsatellite = 8/0, nnew mtDNA/microsatellite = 3/11) to investigate the position of previously unstudied habitats in the migratory network: Brazil, SG, and Chile–Peru. These new genetic data show connectivity between Brazil and Argentina, exemplified by weak genetic differentiation and the movement of 1 genetically identified individual between the South American grounds. The single sample from Chile–Peru had an mtDNA haplotype previously only observed in the Indo-Pacific and had a nuclear genotype that appeared admixed between the Indo-Pacific and South Atlantic, based on genetic clustering and assignment algorithms. The SG samples were clearly South Atlantic and were more similar to the South American than the South African wintering grounds. This study highlights how international collaborations are critical to provide context for emerging or recovering regions, like the SG feeding ground, as well as those that remain critically endangered, such as Chile–Peru.
    Description: This work was supported by the EU BEST 2.0 medium grant 1594 and UK DARWIN PLUS grant 057 and additional funding from the World Wildlife Fund GB107301. The collection of the Chile–Peru sample was supported by the Global Greengrants Fund and the Pacific Whale Foundation. The collection of the Brazilian samples was supported through grants by the Brazilian National Research Council to Paulo H. Ott (CNPq proc. n° 144064/98-7) and Paulo A.C. Flores (CNPq proc. n° 146609/1999-9) and with support from the World Wildlife Fund (WWF-Brazil). The collection of the South African samples was supported by the Global Greengrants Fund, the Pacific Whale Foundation and Charles University Grant Agency (1140217). E.L.C. was partially supported by a Rutherford Discovery Fellowship from the Royal Society of New Zealand. This study forms part of the Ecosystems component of the British Antarctic Survey Polar Sciences for Planet Earth Programme, funded by the Natural Environment Research Council.
    Keywords: population structure ; connectivity ; migration ; gene flow
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  • 15
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Johnson, W. M., Alexander, H., Bier, R. L., Miller, D. R., Muscarella, M. E., Pitz, K. J., & Smith, H. Auxotrophic interactions: A stabilizing attribute of aquatic microbial communities? FEMS Microbiology Ecology, (2020): fiaa115, doi: 10.1093/femsec/fiaa115.
    Description: Auxotrophy, or an organism's requirement for an exogenous source of an organic molecule, is widespread throughout species and ecosystems. Auxotrophy can result in obligate interactions between organisms, influencing ecosystem structure and community composition. We explore how auxotrophy-induced interactions between aquatic microorganisms affect microbial community structure and stability. While some studies have documented auxotrophy in aquatic microorganisms, these studies are not widespread, and we therefore do not know the full extent of auxotrophic interactions in aquatic environments. Current theoretical and experimental work suggests that auxotrophy links microbial community members through a complex web of metabolic dependencies. We discuss the proposed ways in which auxotrophy may enhance or undermine the stability of aquatic microbial communities, highlighting areas where our limited understanding of these interactions prevents us from being able to predict the ecological implications of auxotrophy. Finally, we examine an example of auxotrophy in harmful algal blooms to place this often theoretical discussion in a field context where auxotrophy may have implications for the development and robustness of algal bloom communities. We seek to draw attention to the relationship between auxotrophy and community stability in an effort to encourage further field and theoretical work that explores the underlying principles of microbial interactions.
    Description: This work was supported by the National Science Foundation [OCE-1356192].
    Keywords: Auxotrophy ; Microbial community stability ; Microbial interactions ; Aquatic
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  • 16
    Publication Date: 2022-10-26
    Description: Author Posting. © American Geophysical Union, 2020. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 47(15), (2020): e2020GL087266, doi:10.1029/2020GL087266.
    Description: Using a recently compiled global marine data set of dissolved helium isotopes and helium and neon concentrations, we make an estimate of the inventory of hydrothermal 3He in the Southern Ocean to be 4.9 ± 0.6 × 104 moles. Under the assumption that the bulk of the hydrothermally sourced 3He is upwelled there, we use recent estimates of the global hydrothermal 3He flux to determine an e‐folding residence time of 99 ± 18 years, depending on assumptions of water mass and upwelling boundaries. Our estimate is within the broad range of values obtained from recent Southern Ocean circulation models.
    Description: This work was funded under the auspices of the U.S. National Science Foundation's Grant OCE‐1756138.
    Description: 2021-02-04
    Keywords: Hydrothermal budgets ; Meridional overturning circulation ; Marine productivity ; Micronutrients ; Dissolved iron ; Southern Ocean upwelling
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  • 17
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Ryan, S., Hellmer, H. H., Janout, M., Darelius, E., Vignes, L., & Schroeder, M. Exceptionally warm and prolonged flow of warm deep water toward the Filchner-Ronne Ice Shelf in 2017. Geophysical Research Letters, 47(13),(2020): e2020GL088119, doi:10.1029/2020GL088119.
    Description: The Filchner‐Ronne Ice Shelf, fringing the southern Weddell Sea, is Antarctica's second largest ice shelf. At present, basal melt rates are low due to active dense water formation; however, model projections suggest a drastic increase in the future due to enhanced inflow of open‐ocean warm water. Mooring observations from 2014 to 2016 along the eastern flank of the Filchner Trough (76°S) revealed a distinct seasonal cycle with inflow if Warm Deep Water during summer and autumn. Here we present extended time series showing an exceptionally warm and long inflow in 2017, with maximum temperatures exceeding 0.5°C. Warm temperatures persisted throughout winter, associated with a fresh anomaly, which lead to a change in stratification over the shelf, favoring an earlier inflow in the following summer. We suggest that the fresh anomaly developed upstream after anomalous summer sea ice melting and contributed to a shoaling of the shelf break thermocline.
    Description: The authors would like to express their gratitude to the officers and crews of RV Polarstern (cruises PS92 [Grant AWI_PS82_02], PS96 [Grant AWI_PS96_01], and PS111 [Grant AWI_PS111_01]), RRS Ernest Shackleton (Cruise ES060), and RSS James Clark Ross (Cruise JR16004) for their efficient assistance. E. D. received funding from the project TOBACO (267660), POLARPROG, Norges Forskningsrd.
    Keywords: Ocean-ice shelf interaction ; Weddell Sea ; Warm inflow ; Antarctic Slope Front ; Filchner-Ronne Ice Shelf
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  • 18
    Publication Date: 2022-10-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Wang, P., Huang, C., Lin, J., Jian, Z., Sun, Z., & Zhao, M. The South China Sea is not a mini-Atlantic: plate-edge rifting vs intra-plate rifting. National Science Review, 6(5), (2019): 902-913, doi:10.1093/nsr/nwz135.
    Description: The South China Sea, as ‘a non-volcanic passive margin basin’ in the Pacific, has often been considered as a small-scale analogue of the Atlantic. The recent ocean drilling in the northern South China Sea margin found, however, that the Iberian model of non-volcanic rifted margin from the Atlantic does not apply to the South China Sea. In this paper, we review a variety of rifted basins and propose to discriminate two types of rifting basins: plate-edge type such as the South China Sea and intra-plate type like the Atlantic. They not only differ from each other in structure, formation process, lifespan and geographic size, but also occur at different stages of the Wilson cycle. The intra-plate rifting occurred in the Mesozoic and gave rise to large oceans, whereas the plate-edge rifting took place mainly in the mid-Cenozoic, with three-quarters of the basins concentrated in the Western Pacific. As a member of the Western Pacific system of marginal seas, the South China Sea should be studied not in isolation on its origin and evolution, but in a systematic context to include also its neighboring counterparts.
    Description: This work was supported by the National Natural Science Foundation of China as a part of the ‘South China Sea Deep’ Project (91128000).
    Keywords: Rifting ; Marginal basin ; Passive margin ; South China Sea ; Western Pacific ; Subduction
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  • 19
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    Unknown
    Wiley
    In:  EPIC3Earth Surface Processes and Landforms, Wiley, ISSN: 0197-9337
    Publication Date: 2022-10-21
    Description: Thaw slumps in ice‐rich permafrost can retreat tens of metres per summer, driven by the melt of subaerially exposed ground ice. However, some slumps retain an ice‐veneering debris cover as they retreat. A quantitative understanding of the thermal regime and geomorphic evolution of debris‐covered slumps in a warming climate is largely lacking. To characterize the thermal regime, we instrumented four debris‐covered slumps in the Canadian Low Arctic and developed a numerical conduction‐based model. The observed surface temperatures 20°C and steep thermal gradients indicate that debris insulates the ice by shifting the energy balance towards radiative and turbulent losses. After the model was calibrated and validated with field observations, it predicted sub‐debris ice melt to decrease four‐fold from 1.9 to 0.5 m as the thickness of the fine‐grained debris quadruples from 0.1 to 0.4 m. With warming temperatures, melt is predicted to increase most rapidly, in relative terms, for thick (~0.5‐1.0 m) debris covers. The morphology and evolution of the debris‐covered slumps were characterized using field and remote sensing observations, which revealed differences in association with morphology and debris composition. Two low‐angle slumps retreated continually despite their persistent fine‐grained debris covers. The observed elevation losses decreased from ~1.0 m/yr where debris thickness ~.2 m to 0.1 m/yr where thickness ~1.0 m. Conversely, a steep slump with a coarse‐grained debris veneer underwent short‐lived bursts of retreat, hinting at a complex interplay of positive and negative feedback processes. The insulative protection and behaviour of debris vary significantly with factors such as thickness, grain size and climate: debris thus exerts a fundamental, spatially variable influence on slump trajectories in a warming climate.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 20
    Publication Date: 2022-10-21
    Description: This paper investigates different methods for quantifying thaw subsidence using terrestrial laser scanning (TLS) point clouds. Thaw subsidence is a slow (millimetre to centimetre per year) vertical displacement of the ground surface common in ice‐rich permafrost‐underlain landscapes. It is difficult to quantify thaw subsidence in tundra areas as they often lack stable reference frames. Also, there is no solid ground surface to serve as a basis for elevation measurements, due to a continuous moss–lichen cover. We investigate how an expert‐driven method improves the accuracy of benchmark measurements at discrete locations within two sites using multitemporal TLS data of a 1‐year period. Our method aggregates multiple experts’ determination of the ground surface in 3D point clouds, collected in a web‐based tool. We then compare this to the performance of a fully automated ground surface determination method. Lastly, we quantify ground surface displacement by directly computing multitemporal point cloud distances, thereby extending thaw subsidence observation to an area‐based assessment. Using the expert‐driven quantification as reference, we validate the other methods, including in‐situ benchmark measurements from a conventional field survey. This study demonstrates that quantifying the ground surface using 3D point clouds is more accurate than the field survey method. The expert‐driven method achieves an accuracy of 0.1 ± 0.1 cm. Compared to this, in‐situ benchmark measurements by single surveyors yield an accuracy of 0.4 ± 1.5 cm. This difference between the two methods is important, considering an observed displacement of 1.4 cm at the sites. Thaw subsidence quantification with the fully automatic benchmark‐based method achieves an accuracy of 0.2 ± 0.5 cm and direct point cloud distance computation an accuracy of 0.2 ± 0.9 cm. The range in accuracy is largely influenced by properties of vegetation structure at locations within the sites. The developed methods enable a link of automated quantification and expert judgement for transparent long‐term monitoring of permafrost subsidence.
    Repository Name: EPIC Alfred Wegener Institut
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  • 21
    Publication Date: 2022-10-21
    Description: Delaware Bay is a large estuary with a deep, relatively narrow channel and wide, shallow banks, providing a clear example of a “channel-shoal” estuary. This numerical modeling study addresses the exchange flow in this channel-shoal estuary, specifically to examine how the lateral geometry affects the strength and mechanisms of exchange flow. We find that the exchange flow is exclusively confined to the channel region during spring tides, when stratification is weak, and it broadens laterally over the shoals during the more stratified neap tides, but still occupies a small fraction of the total width of the estuary. Exchange flow is relatively weak during spring tides, resulting from oscillatory shear dispersion in the channel augmented by weak Eulerian exchange flow. During neap tides, stratification and shear increase markedly, resulting in a strong Eulerian residual shear flow, with a net exchange flow roughly 5 times that of the spring tide. During both spring and neap tides, lateral salinity gradients generated by differential advection at the edge of the channel drive a tidally oscillating cross-channel flow, which strongly influences the stratification, along-estuary salt balance and momentum balance. The lateral flow also causes the phase variation in salinity that results in oscillatory shear dispersion during both spring and neap tides and is a significant advective momentum source driving the residual circulation. Thus, although the shoals make a negligible direct contribution to the exchange flow, the salinity gradients between the channel and the shoal are critical to the stratification and exchange flow within the estuarine channel.
    Description: National Science Foundation (NSF): OCE-1325136; National Science Foundation (NSF): OCE-1634490; National Science Foundation (NSF): Jia-Lin Chen OCE-1736539
    Keywords: Estuarine circulation ; Tidal dispersion ; Lateral circulation
    Repository Name: Woods Hole Open Access Server
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  • 22
    Publication Date: 2022-10-21
    Description: The instrumental record reveals that tropical cyclone activity is sensitive to oceanic and atmospheric variability on inter-annual and decadal scales. However, our understanding of climate’s influence on tropical cyclone behavior is restricted by the short historical record and sparse prehistorical reconstructions, particularly in the western North Pacific where coastal communities suffer loss of life and livelihood from typhoons annually. Here we reconstruct three millennia of deep tropical North Pacific cyclogenesis and compare with other records to explore past regional typhoon dynamics. These records demonstrate low baseline activity prior to 1350 C.E. followed by a rapid culmination in activity during the Little Ice Age. This pattern is concurrent with hydroclimate proxy variability, suggesting a centennial-scale link between Pacific hydroclimate and tropical cyclone climatology. Using an ensemble of global climate models, we demonstrate that migration of the Pacific Walker circulation and variability in two Pacific climate modes during the Little Ice Age contributed to enhanced tropical cyclone activity in the tropical western North Pacific. Changes to Walker Circulation and expansion of the tropics projected for the next century invert Little Ice Age hydroclimate trends, potentially reducing typhoon activity in the deep tropical Pacific.
    Description: This project was supported by the Strategic Environmental Research and Development Program through award SERDP RC-2336
    Keywords: Tropical cyclones ; Little Ice Age ; Last millennium ; Paleoclimate
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  • 23
    Publication Date: 2022-10-21
    Description: Presented at Ocean Sciences, San Diego, 16-21, February 2020
    Description: BCO-DMO curates earth science data where models become increasingly important. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) is a publicly accessible earth science data repository created to curate, publicly serve (publish), and archive digital data and information from biological, chemical and biogeochemical research conducted in coastal, marine, great lakes and laboratory environments. Recently, more and more of the projects submitted to BCO-DMO represent modeling efforts which further increase our knowledge of chemical and biological properties within the ocean ecosystem. We feel the time is at hand for the scientific community to begin a concerted and holistic approach to the curation of code and software.
    Description: Award(s): NSF #1924618
    Keywords: Data management ; Open science ; Survey ; Research needs
    Repository Name: Woods Hole Open Access Server
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  • 24
    Publication Date: 2022-10-21
    Description: Presented at Data Science Training Camp, Woods Hole, MA, January, 22 - 23, 2020.
    Description: With data and software increasingly recognized as scholarly research products, and aiming towards open science and reproducibility, it is imperative for today's oceanographers to learn foundational practices and skills for data management and research computing, as well as practices specific to the ocean sciences. This educational package was developed as a data science training camp for graduate students and professionals in the ocean sciences and implemented at the Woods Hole Oceanographic Institution (WHOI) in 2019 and 2020. Here we provide materials for the 2020 camp which was delivered in-person during two afternoons (total of 8 hours), with two modules per afternoon. We aimed for ~40 participants per camp, with disciplines spanning Earth and life sciences and engineering. Disciplines at each table were mixed on the first afternoon but similar on the second afternoon. Contents of this package include the syllabus and slide presentations for each of the four modules: 1 "Good enough practices in scientific computing," 2 Data management, 3 Software development and research computing, and 4 Best practices in the ocean sciences. The 3rd module is split into two parts. We also include a poster presented at the 2020 Ocean Science Meeting, which has some results from pre- and post-surveys. Funding: The camp was funded by WHOI Academic Programs Office through a Doherty Chair in Education Award, with additional support from WHOI Ocean Informatics Working Group, WHOI Information Services, MBLWHOI Library, the NSF-funded Biological and Chemical Oceanography Data Management Office (BCO-DMO), and an NSF-funded XSEDE Jetstream Education Allocation TG-OCE190011. We also utilized resources from the NSF-funded Pangeo project.
    Description: The camp was funded by WHOI Academic Programs Office through a Doherty Chair in Education Award, with additional support from WHOI Ocean Informatics Working Group, WHOI Information Services, MBLWHOI Library, the NSF-funded Biological and Chemical Oceanography Data Management Office (BCO-DMO), and an NSF-funded XSEDE Jetstream Education Allocation TG-OCE190011. We also utilized resources from the NSF-funded Pangeo project.
    Keywords: Data science ; Best practices ; Data management ; Scientific computing ; Training ; Workshop ; Professional development ; Curriculum development
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  • 25
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    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-10-21
    Description: Presented at Sea Education Association, Woods Hole, MA, February 26, 2020
    Description: Ocean 101, engaging classes to help SEA students understand the frontiers of ocean climate science. This particular class focuses on data management in oceanography. Covered topics are the importance of open data, the data life cycle and F.A.I.R. Principles. The interactive part consists of creating the content for a data management plan and applying general data management practices.
    Keywords: Oceanography ; Data management practices ; Open data ; Teaching ; Outreach
    Repository Name: Woods Hole Open Access Server
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  • 26
    Publication Date: 2022-10-21
    Description: Presented at Ocean Sciences, San Diego, 16-21, February 2020
    Description: Oceanographic data, when well-documented and stewarded toward preservation, have the potential to accelerate new science and facilitate our understanding of complex natural systems. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) is funded by the NSF to document and manage marine biological, chemical, physical, and biogeochemical data, ensuring their discovery and access, and facilitating their reuse. The task of curating and providing access to research data is a collaborative process, with associated actors and critical activities occurring throughout the data’s life cycle. BCO-DMO supports all phases of the data life cycle and works closely with investigators to ensure open access of well-documented project data and information. Supporting this curation process is a flexible cyberinfrastructure that provides the means for data submission, discovery, and access; ultimately enabling reuse. Based upon community feedback, this infrastructure is undergoing evaluation and improvement to better meet oceanographic research needs. This poster will introduce the repository and describe some of the strategic enhancements coming to BCO-DMO, and presents an opportunity for you to provide feedback on enhancements yet to come. We invite you to think about your own research workflow of searching and accessing new data for research, and to provide your feedback through the poster’s interactive sections. Your input can help BCO-DMO improve its service to the research community.
    Description: Award(s): NSF #1924618
    Keywords: Data management ; Open science ; Survey ; Research needs
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  • 27
    facet.materialart.
    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-10-21
    Description: This set of Matlab mfiles (all with names beginning with “bwavesp”) can be used to calculate barotropic coastal wave properties in the absence of density stratification. The wave frequency is taken to be entirely real (hence stable). You are allowed to have a mean alongshore flow, if desired, and you can apply the rigid lid and/or coastal long wave approximations. The model can be run in the non-rotating limit if desired. Once a wave’s frequency is found, the modal structure is displayed, and a perturbation (weak friction) imaginary correction to the wave frequency is found. The code can use an exact open boundary condition or a closed condition at either side of the domain.
    Keywords: Matlab ; Wave modal structures ; Dispersion curves
    Repository Name: Woods Hole Open Access Server
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  • 28
    Publication Date: 2022-10-21
    Description: Presented as Sharing Data Through the Biological and Chemical Oceanography Data Management Office Webinar, online, January, 2020
    Description: This talk provides an overview of the Biological and Chemical Oceanography Data Management Office and the collaborative data sharing process that occurs between individual investigators and the BCO-DMO repository. The presentation includes background on the repository, what to expect after submitting your data, and helpful data management practices that can streamline data sharing and support open science.
    Description: GBMF #8453
    Keywords: Marine Microbiology Initiative ; Data management ; Data sharing ; Repository overview ; Best practices
    Repository Name: Woods Hole Open Access Server
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  • 29
    Publication Date: 2022-10-21
    Description: This set of Matlab mfiles (all with names beginning with “bwavesc”) can be used to calculate barotropic coastal wave properties in the absence of density stratification. The wave frequency is complex so that unstable or strongly damped modes can be treated. You are allowed to have a mean alongshore flow, if desired, and you can apply the rigid lid approximation. The model can be run in the non-rotating limit if desired. Once a wave’s frequency is found, the modal structure is displayed. The code can use an exact open boundary condition or a closed condition at either side of the domain.
    Keywords: Matlab ; Wave modal structures ; Dispersion curves
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  • 30
    Publication Date: 2022-12-01
    Description: The Overturning in the Subpolar North Atlantic Program (OSNAP) is an international effort started in 2014 dedicated to achieving a better understanding of the link between dense-water formation and the meridional overturning circulation in the high-latitude North Atlantic. Moorings, gliders, and subsurface acoustically-tracked RAFOS floats have been used to collect temperature, salinity, and current data across the Labrador Sea, Irminger Sea, Reykjanes Ridge, Iceland Basin, Rockall-Hatton Plateau, and Rockall Trough. The specific objective of the OSNAP float program is to gather information on the pathways of the dense overflow waters transported by the deep limb of the overturning circulation and assess the connection of those pathways with currents observed crossing the OSNAP mooring line. This data report details the observations collected by 148 floats that were deployed for OSNAP during the summers of 2014, 2015, 2016 and 2017. Deployment locations were in the Iceland Basin, Irminger Sea, and in the Charlie-Gibbs Fracture Zone. Mission lengths ranged from 540-730 days, and the floats were ballasted to passively drift at a fixed pressure of either 1800, 2000, 2200, 2500, or 2800 dbar to tag the deep overflow water masses of the subpolar North Atlantic (Iceland-Scotland and Denmark Strait Overflow Waters).
    Description: Funding was provided by the National Science Foundation under Grant No. OCE-1259618 & OCE-1756361
    Keywords: RAFOS ; Trajectory ; Subpolar North Atlantic
    Repository Name: Woods Hole Open Access Server
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  • 31
    Publication Date: 2022-12-01
    Description: This is the final data report for all acoustically-tracked subsurface RAFOS floats deployed for the “Deep Water Dispersion Experiment: RAFOS Float Study in Support of Analysis of Possible Consequences of Large Scale Oil-Spills under Various Scenarios” (DWDE). This study is part of the larger program “Deep and Shallow Particle Dispersion and Biological Connectivity over the Continental Slope in the Western Gulf of Mexico”, of the Gulf of Mexico Research Consortium (CIGoM). The objective of the DWDE project was to measure and evaluate the ocean circulation at various depths in order to estimate the rates and pathways by which a passive tracer (e.g. pollutant, nutrients, etc.) would spread. The experiment consisted of the deployment 93 RAFOS floats and five sound source moorings (needed for tracking the floats underwater) over the course of five cruises, between June 2016 and January 2019, in the Perdido region of the Gulf of Mexico. The floats were deployed nearly simultaneously at stacked depths of 300 and 1500 dbar, in sets of 2-4 instruments per station, for calculating dispersion statistics. Mission lengths for the floats were set to ~12 to 18 months. Included in this report are cruise summaries, statistics and notes on sound source and float performance, sound source drift calculations, description of the RAFOS float data processing steps, and figures.
    Description: Funding was provided by the Mexican National Council for Science and Technology - Mexican Ministry of Energy - Hydrocarbon Fund, project 201441. This work was completed through a contract by the Center for Scientific Research and Higher Education at Ensenada (CICESE) under Grant No. 188355 to the Woods Hole Oceanographic Institution.
    Keywords: RAFOS ; Trajectory ; Gulf of Mexico ; Deep Water Dispersion Experiment ; Ocean circulation
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  • 32
    Publication Date: 2022-07-04
    Description: Collapse of permafrost coasts delivers large quantities of particulate organic carbon (POC) to arctic coastal areas. With rapidly‐changing environmental conditions, sediment and organic carbon (OC) mobilization and transport pathways are also changing. Here, we assess the sources and sinks of POC in the highly‐dynamic nearshore zone of Herschel Island ‐ Qikiqtaruk (Yukon, Canada). Our results show that POC concentrations sharply decrease, from 15.9 to 0.3 mg L‐1, within the first 100 – 300 meters offshore. Simultaneously, radiocarbon ages of POC drop from 16,400 to 3,600 14C years, indicating rapid settling of old permafrost POC to underlying sediments. This suggests that permafrost OC is, apart from a very narrow resuspension zone (〈5 m water depth), predominantly deposited in nearshore sediments. While long‐term storage of permafrost OC in marine sediments potentially limits biodegradation and its subsequent release as greenhouse gas, resuspension of fine‐grained, OC‐rich sediments in the nearshore zone potentially enhances OC turnover.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , NonPeerReviewed , info:eu-repo/semantics/article
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  • 33
    Publication Date: 2022-05-26
    Description: A subbottom reflection survey of southern Narragansett Bay, Rhode Island was made by means of a continuous seismic reflection technique (the Continuous Seismic Profiler)developed at the Woods Hole Oceanographic Institution (Knott and Hersey, 1956). The observational program was conducted in May, 1958 under contract with the Corps of Engineers, U. S. Army, and in May, 1960 under contract with the Bureau of Ships, U . S. Navy, to obtain foundation data for locating hurricane barriers (Corps of Engineers, 1957) and to develop techniques for studying the geologic structure of shallow water areas. At the Woods Hole Oceanographic Institution this work is part of a continuing, broader program directed toward describing the structures and tracing the geologic history of continental margins. The Continuous Seismic Profiler employs a wide-band sound source the pulses from which are reflected from the bottom and from sediment and rock layers beneath the bottom. The sound pulse is synchronized with the sweep of a Precision Graphic Recorder (PGR), which records sound energy received at an underwater detector. (In 1958 the sound source was an early form of the Sparker, while in 1960 the Edgerton Thumper was the source. (These instruments are described below.) When the sound source and the detector are towed from a boat, the reflected sound energy is recorded to present a continuously correlated picture of subbottom structure. Measurements in Narragansett Bay were made south of the Jamestown Bridge in the West Passage and between Conanicut Island and Newport Neck in the East Passage (Fig . 1A and lB). Two additional traverses were made across the bay in areas to the north where core data are available (Fig. 2).
    Description: The Bureau of Ships under Contract NObsr 72521 and the U. S. Army Corps of Engineers under Contract DA-19-016 CIVENG-58-65
    Keywords: Seismic reflection method ; Narragansett Bay (R.I.)
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  • 34
    Publication Date: 2022-05-26
    Description: Research at sea during this three month period, supported by Contract NObsr-72521, was carried out mostly during the latter portion of the CHAIN Cruise 21 to the eastern Mediterranean. Near-surface sound transmission runs were made with the aid of two foreign ships in the eastern Mediterranean and Tyrrhenian Sea. Sound velocity measurements were made there also. Reverberation and back-scatter measurements using half pound explosives as sound sources were recorded on magnetic tape for future analysis. Further, at several places during the cruise acoustic reflectivity of the sea-floor was measured by means of a semi-automatic system employing the Precision Graphic Recorder and the Edo UQN Echo Sounder. Research other than that on CHAIN Cruise 21, included ambient noise studies of recorded signals from finback whales, and analysis of data from previous observations at sea.
    Description: The Bureau of Ships Under Contract NObsr - 72521
    Keywords: Sonar ; Underwater acoustics ; Submarine geology
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  • 35
    Publication Date: 2022-05-26
    Description: This narrative report of CHAIN Cruise 36 includes the chief scientist's journal, a summary track chart, and a log of stations occupied. The cruise was made in two parts : the first, to the Outer Ridge north of Puerto Rico for seismic reflection and refraction work with ATLANTIS II, and the second from the Outer Ridge to the area of the Barracuda Fault east of the Lesser Antilles for bathymetric and gravity surveys and a detailed geophysical study of the area between 16° and 17 °N and 57 ° and 59 °W. The scientific program included echo sounding, continuous seismic reflection profiling, seismic refraction profiles , gravity measurements, dredging, bottom photography, and heat flow measurements.
    Description: This cruise was supported by the National Science Foundation under Grant GP - 1123.
    Keywords: Oceanography--Research ; Marine geophysics
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  • 36
    Publication Date: 2022-05-26
    Description: This report presents mechanical and chemical test data from the three pressure hulls fabricated for the Deep Research Submarine, ALVIN. The data is discussed briefly, the low Charpy V-Notch values after stress relief noted, and recommendations made for further testing required for design and evaluation. The three hulls are compared with reference to failure criteria.
    Description: Director of Undersea Programs Office of Naval Research prepared under Contract Nonr-3484 (00)
    Keywords: Hulls (Naval architecture)
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  • 37
    Publication Date: 2022-05-26
    Description: Geophysical investigations were carried out aboard R /V CHAIN in the Indian Ocean, the Mediterranean Sea, and the North Atlantic Ocean. Observations underway were continuous seismic profiling, gravity, magnetic, and echo sounding measurements. At stations rocks were dredged, cores were taken (about 10 meters long, photographic montages of the sea floor were made, and the sound velocity of the water was measured as a function of depth. Progress is being made in filtering and correlation techniques for seismic profiling, while seismic receiving arrays were improved to make them quieter. The analysis of internal wave data is continuing, but further observations at sea will be required in order to fully understand the mechanism of propagation. Seven papers were published during this period and thirteen were submitted for publication. These papers are concerned with seismic profiling, seismic refraction profiles, sediment ponding, sound transmission, thermal fronts, and biological papers dealing with sound production by marine mammals and deep-sea fish natural history gained from bottom photographs. A new thermistor string intended to replace and improve upon the original thermistor chain was the principal new instrumental development.
    Description: Undersea Warfare Branch Office of Naval Research under Contracts Nonr-4029(00)NR260-101 and Nonr-3243(00)NR260-108
    Keywords: Submarine geology ; Underwater acoustics ; Oceanographic instruments
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  • 38
    facet.materialart.
    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: The computer program presented here seeks to improve estimation of statistical parameters for grain-size data by use of interpolated values. Interpolation is made by fitting a series of overlapping parabolas to the data, and follows the method of Snyder (1961). The values are used in moment formulas to compute standard statistical measures. Skewness and kurtosis are reduced by the interpolation data, and extreme positive values of kurtosis tend to be greatly reduced. The program also picks major modes, the median, and sediment type .
    Description: The United States Geological Survey under Contract USGS-14-08-0001-8358
    Keywords: Marine sediments--Computer programs
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  • 39
    Publication Date: 2022-05-26
    Description: The objective of this investigation was to measure bottom loss in normal incident reflection of pulses of twelve kcps sound and to study its geological significance. To this end a semi-automatic instrument system was developed which is capable of making continuous measurements of the peak pressure and the time integral of the square of the pressure of the sea floor echo, from a vessel underway. Observations were taken in both deep and shallow water areas in the Western North Atlantic. The early cruises were conducted in deep water to investigate the range and variability of bottom loss values. Geological control consisted mainly of a precise bathymetric record. The later cruises were conducted in shall ow water, in areas where the geology has been well studied previously by investigators using techniques of classical geology. In these latter cruises the acoustic measurements were correlated with a schedule of sediment dredging and underwater photography. Thirty-one thousand acoustic measurements were made. Median bottom loss values and standard deviations were computed and the results summarized in eleven hundred sets, each set corresponding to a location at sea. Seventy-seven sediment stations were occupied. A complete particle size analysis and a water content analysis were performed on these sediments to determine their size and mass characteristics . The size characteristics included the median grain size, the sorting coefficient, and the percentages of gravel, sand, silt, and clay. A sediment class name was determined from the gravel, sand, silt, and clay percentages according to the Shepard system of classification. The mass characteristics included porosity, bulk density, sound velocity, acoustic impedance, Rayleigh reflection coefficient, and theoretical bottom loss. The combined results show a good correlation between measurements of bottom loss and both mass and size characteristics of the sediment. The measured bottom loss increases as the porosity increases. The measured bottom loss also increases as the silt-clay percentage increases since the porosity of sediments generally increases as this fraction increases. It seems that the Rayleigh reflection coefficient can be used to predict acoustic bottom loss at normal incidence. Conversely, normally-incident bottom loss can be used under the assumption of a Rayleigh reflection process to determine the nature of the bottom sediment. The acoustical and geological results have been made available in tabulations, scatter diagrams, and as geographical plots. Except for the initial measurements, all operations, including the final displays, were accomplished through automatic digital processing machines.
    Description: The Office of Naval Research under Contract Nonr-4029 ~ Nonr-13 67~ Nonr-1841 (74) ~ NR 083 -15 7~ and the Bureau of Ships under Contracts NObsr-72521 and NObsr-89464.
    Keywords: Marine sediments ; Ocean bottom ; Underwater acoustics--Instruments
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  • 40
    facet.materialart.
    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: The acoustic scattering amplitude for a dilute gaseous object of arbitrary form in a liquid medium is determined self-consistently for the case of linear dimension small as compared to the wavelength. A scatterer of bulk modulus β, and density p, in a medium of bulk modulus II and density p may exhibit monopole resonance scattering at a frequency w,= (4πβoC / pV)l, in which V is the volume and C is the capacitance in electrostatic units of a conducting replica of the scatterer. The criterion for occurrence of the resonance phenomenon is 3Fβo/β 〈〈«1, in which the shape factor F = 4πC3 / 3V〉 1 is minimum for a sphere. Dipole scattering is given in terms of the polarizability dyadic of a nonconducting replica of dielectric constant p/po, and is negligibly small in a neighborhood of the resonance frequency.
    Description: The Office of Naval Research under Contract Nonr-1367(00), NR 261-102.
    Keywords: Sound ; Integral equations
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  • 41
    Publication Date: 2022-05-26
    Description: Summary of investigations conduction in 1962 in the following departments: Department of Applied Oceanography Department of Biology Department of Chemistry and Geology Department of Geophysics Department of Physical Oceanography Department of Theoretical Oceanography and Meteorology
    Description: Funding sponsored by: Contract Nonr-891(OO)NR 385-207 Contract Nonr-2196(OO)NR 083-004 ContractNonr-2129(OO)NR 261-104 Contract Nonr-3351(OO)NR 083-501 Contract Nonr-2672(OO)NR 385-905 Contract Nonr-3484(00)NR 261-140 Contract Nonr-2866(OO)NR 287-004 Contract Nonr-1367(OO)NR 261-102 Contract Nonr-3243(OO)NR 261-136 Contract Nonr-4029(OO)NR 260-101 Contract Nonr-4035(OO)NR 082-124 Contract Nonr-1721(OO) NR 082-021 NIH Grant GM 05748-05 NSF Grant 16355 NSF Grant 23427 NSF Grant 10693 NSF Grant 12178 NSF Grant 22389 NSF G020702 NSF Gl9251 AEC Contract AT(30-1)-1918 AEC AT(30-l)-3010, AT (30-1)-3145, AT(30-l)-2174 USGS 8358 Contract NObsr 72521 Contract SC 90784
    Keywords: Oceanography--Research
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  • 42
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Lasek-Nesselquist, E., & Johnson, M. D. A phylogenomic approach to clarifying the relationship of Mesodinium within the Ciliophora: a case study in the complexity of mixed-species transcriptome analyses. Genome Biology and Evolution, 11(11), (2019): 3218–3232, doi:10.1093/gbe/evz233.
    Description: Recent high-throughput sequencing endeavors have yielded multigene/protein phylogenies that confidently resolve several inter- and intra-class relationships within the phylum Ciliophora. We leverage the massive sequencing efforts from the Marine Microbial Eukaryote Transcriptome Sequencing Project, other SRA submissions, and available genome data with our own sequencing efforts to determine the phylogenetic position of Mesodinium and to generate the most taxonomically rich phylogenomic ciliate tree to date. Regardless of the data mining strategy, the multiprotein data set, or the molecular models of evolution employed, we consistently recovered the same well-supported relationships among ciliate classes, confirming many of the higher-level relationships previously identified. Mesodinium always formed a monophyletic group with members of the Litostomatea, with mixotrophic species of Mesodinium—M. rubrum, M. major, and M. chamaeleon—being more closely related to each other than to the heterotrophic member, M. pulex. The well-supported position of Mesodinium as sister to other litostomes contrasts with previous molecular analyses including those from phylogenomic studies that exploited the same transcriptomic databases. These topological discrepancies illustrate the need for caution when mining mixed-species transcriptomes and indicate that identifying ciliate sequences among prey contamination—particularly for Mesodinium species where expression from stolen prey nuclei appears to dominate—requires thorough and iterative vetting with phylogenies that incorporate sequences from a large outgroup of prey.
    Description: We thank David Beaudoin and Holly V. Moeller for their assistance in collecting cells and extracting RNA. We thank the Josephine Bay Paul Center for Comparative Molecular Biology and Evolution at the Marine Biological Laboratory for the generous use of their servers. This work was supported in part by a National Science Foundation grant to both authors (IOS 1354773).
    Keywords: Mesodinium ; Litostomatea ; ciliate phylogenomics ; mixed-species transcriptomes ; sequence contamination
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  • 43
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Long, M. H., Rheuban, J. E., McCorkle, D. C., Burdige, D. J., & Zimmerman, R. C. Closing the oxygen mass balance in shallow coastal ecosystems. Limnology and Oceanography, 64(6), (2019): 2694-2708, doi: 10.1002/lno.11248.
    Description: The oxygen concentration in marine ecosystems is influenced by production and consumption in the water column and fluxes across both the atmosphere–water and benthic–water boundaries. Each of these fluxes has the potential to be significant in shallow ecosystems due to high fluxes and low water volumes. This study evaluated the contributions of these three fluxes to the oxygen budget in two contrasting ecosystems, a Zostera marina (eelgrass) meadow in Virginia, U.S.A., and a coral reef in Bermuda. Benthic oxygen fluxes were evaluated by eddy covariance. Water column oxygen production and consumption were measured using an automated water incubation system. Atmosphere–water oxygen fluxes were estimated by parameterizations based on wind speed or turbulent kinetic energy dissipation rates. We observed significant contributions of both benthic fluxes and water column processes to the oxygen mass balance, despite the often‐assumed dominance of the benthic communities. Water column rates accounted for 45% and 58% of the total oxygen rate, and benthic fluxes accounted for 23% and 39% of the total oxygen rate in the shallow (~ 1.5 m) eelgrass meadow and deeper (~ 7.5 m) reef site, respectively. Atmosphere–water fluxes were a minor component at the deeper reef site (3%) but a major component at the shallow eelgrass meadow (32%), driven by diel changes in the sign and strength of atmosphere–water gradient. When summed, the measured benthic, atmosphere–water, and water column rates predicted, with 85–90% confidence, the observed time rate of change of oxygen in the water column and provided an accurate, high temporal resolution closure of the oxygen mass balance.
    Description: This work was substantially improved by comments from two anonymous reviewers. We thank Victoria Hill, David Ruble, Jeremy Bleakney, and Brian Collister for assistance in the field and the staff of the Bermuda Institute of Ocean Sciences and the Anheuser‐Busch Coastal Research Center for logistical support. This work was supported by NSF OCE grants 1657727 (to M.H.L. and D.C.M.), 1635403 (to R.C.Z. and D.J.B.), and 1633951 (to M.H.L.).
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  • 44
    Publication Date: 2022-05-26
    Description: Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry, Geophysics, Geosystems XX (2019): Tyne, R. L., Barry, P. H., Hillegonds, D. J., Hunt, A. G., Kulongoski, J. T., Stephens, M. J., Byrne, D. J., & Ballentine, C. J. A novel method for the extraction, purification, and characterization of noble gases in produced fluids. Geochemistry Geophysics Geosystems, 20, (2019): 5588-5597, doi: 10.1029/2019GC008552.
    Description: Hydrocarbon systems with declining or viscous oil production are often stimulated using enhanced oil recovery (EOR) techniques, such as the injection of water, steam, and CO2, in order to increase oil and gas production. As EOR and other methods of enhancing production such as hydraulic fracturing have become more prevalent, environmental concerns about the impact of both new and historical hydrocarbon production on overlying shallow aquifers have increased. Noble gas isotopes are powerful tracers of subsurface fluid provenance and can be used to understand the impact of EOR on hydrocarbon systems and potentially overlying aquifers. In oil systems, produced fluids can consist of a mixture of oil, water and gas. Noble gases are typically measured in the gas phase; however, it is not always possible to collect gases and therefore produced fluids (which are water, oil, and gas mixtures) must be analyzed. We outline a new technique to separate and analyze noble gases in multiphase hydrocarbon‐associated fluid samples. An offline double capillary method has been developed to quantitatively isolate noble gases into a transfer vessel, while effectively removing all water, oil, and less volatile hydrocarbons. The gases are then cleaned and analyzed using standard techniques. Air‐saturated water reference materials (n = 24) were analyzed and results show a method reproducibility of 2.9% for 4He, 3.8% for 20Ne, 4.5% for 36Ar, 5 .3% for 84Kr, and 5.7% for 132Xe. This new technique was used to measure the noble gas isotopic compositions in six produced fluid samples from the Fruitvale Oil Field, Bakersfield, California.
    Description: This work was supported by a Natural Environment Research Council studentship to R. L. Tyne (grant NE/L002612/1) and the USGS (grant 15‐080‐250), as part of the California State Water Resource Control Board's, Oil and Gas Regional Groundwater Monitoring Program (RMP). Data can be accessed in Tables 1 and 2 and in the data release from Gannon et al. (2018). We thank the owners and operators at the Fruitvale Oil Field for access to wells. We thank Stuart Gilfillan and an anonymous reviewer for their constructive reviews as well as Marie Edmonds for editorial handling. We also thank Matthew Landon and Myles Moor from the USGS who provided helpful comments on an earlier version of the manuscript. Any use of trade, firm or product names are for descriptive purposes only and do not imply endorsement by the U.S. Government.
    Description: 2020-04-14
    Keywords: Noble Gas ; Methods ; Produced Fluids
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  • 45
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Chapman, A. S. A., Beaulieu, S. E., Colaco, A., Gebruk, A. V., Hilario, A., Kihara, T. C., Ramirez-Llodra, E., Sarrazin, J., Tunnicliffe, V., Amon, D. J., Baker, M. C., Boschen-Rose, R. E., Chen, C., Cooper, I. J., Copley, J. T., Corbari, L., Cordes, E. E., Cuvelier, D., Duperron, S., Du Preez, C., Gollner, S., Horton, T., Hourdez, S., Krylova, E. M., Linse, K., LokaBharathi, P. A., Marsh, L., Matabos, M., Mills, S. W., Mullineaux, L. S., Rapp, H. T., Reid, W. D. K., Rybakova (Goroslavskaya), E., Thomas, T. R. A., Southgate, S. J., Stohr, S., Turner, P. J., Watanabe, H. K., Yasuhara, M., & Bates, A. E. sFDvent: a global trait database for deep-sea hydrothermal-vent fauna. Global Ecology and Biogeography, 28(11), (2019): 1538-1551, doi: 10.1111/geb.12975.
    Description: Motivation Traits are increasingly being used to quantify global biodiversity patterns, with trait databases growing in size and number, across diverse taxa. Despite growing interest in a trait‐based approach to the biodiversity of the deep sea, where the impacts of human activities (including seabed mining) accelerate, there is no single repository for species traits for deep‐sea chemosynthesis‐based ecosystems, including hydrothermal vents. Using an international, collaborative approach, we have compiled the first global‐scale trait database for deep‐sea hydrothermal‐vent fauna – sFDvent (sDiv‐funded trait database for the Functional Diversity of vents). We formed a funded working group to select traits appropriate to: (a) capture the performance of vent species and their influence on ecosystem processes, and (b) compare trait‐based diversity in different ecosystems. Forty contributors, representing expertise across most known hydrothermal‐vent systems and taxa, scored species traits using online collaborative tools and shared workspaces. Here, we characterise the sFDvent database, describe our approach, and evaluate its scope. Finally, we compare the sFDvent database to similar databases from shallow‐marine and terrestrial ecosystems to highlight how the sFDvent database can inform cross‐ecosystem comparisons. We also make the sFDvent database publicly available online by assigning a persistent, unique DOI. Main types of variable contained Six hundred and forty‐six vent species names, associated location information (33 regions), and scores for 13 traits (in categories: community structure, generalist/specialist, geographic distribution, habitat use, life history, mobility, species associations, symbiont, and trophic structure). Contributor IDs, certainty scores, and references are also provided. Spatial location and grain Global coverage (grain size: ocean basin), spanning eight ocean basins, including vents on 12 mid‐ocean ridges and 6 back‐arc spreading centres. Time period and grain sFDvent includes information on deep‐sea vent species, and associated taxonomic updates, since they were first discovered in 1977. Time is not recorded. The database will be updated every 5 years. Major taxa and level of measurement Deep‐sea hydrothermal‐vent fauna with species‐level identification present or in progress. Software format .csv and MS Excel (.xlsx).
    Description: We would like to thank the following experts, who are not authors on this publication but made contributions to the sFDvent database: Anna Metaxas, Alexander Mironov, Jianwen Qiu (seep species contributions, to be added to a future version of the database) and Anders Warén. We would also like to thank Robert Cooke for his advice, time, and assistance in processing the raw data contributions to the sFDvent database using R. Thanks also to members of iDiv and its synthesis centre – sDiv – for much‐valued advice, support, and assistance during working‐group meetings: Doreen Brückner, Jes Hines, Borja Jiménez‐Alfaro, Ingolf Kühn and Marten Winter. We would also like to thank the following supporters of the database who contributed indirectly via early design meetings or members of their research groups: Malcolm Clark, Charles Fisher, Adrian Glover, Ashley Rowden and Cindy Lee Van Dover. Finally, thanks to the families of sFDvent working group members for their support while they were participating in meetings at iDiv in Germany. Financial support for sFDvent working group meetings was gratefully received from sDiv, the Synthesis Centre of iDiv (DFG FZT 118). ASAC was a PhD candidate funded by the SPITFIRE Doctoral Training Partnership (supported by the Natural Environmental Research Council, grant number: NE/L002531/1) and the University of Southampton at the time of submission. ASAC also thanks Dominic, Lesley, Lettice and Simon Chapman for their support throughout this project. AEB and VT are sponsored through the Canada Research Chair Programme. SEB received support from National Science Foundation Division of Environmental Biology Award #1558904 and The Joint Initiative Awards Fund from the Andrew W. Mellon Foundation. AC is supported by Program Investigador (IF/00029/2014/CP1230/CT0002) from Fundação para a Ciência e a Tecnologia (FCT). This study also had the support of Fundação para a Ciência e a Tecnologia, through the strategic project UID/MAR/04292/2013 granted to marine environmental sciences centre. Data compiled by AVG and EG were supported by Russian science foundation Grant 14‐50‐00095. AH was supported by the grant BPD/UI88/5805/2017 awarded by CESAM (UID/AMB/50017), which is financed by FCT/Ministério da Educação through national funds and co‐funded by fundo Europeu de desenvolvimento regional, within the PT2020 Partnership Agreement and Compete 2020. ERLL was partially supported by the MarMine project (247626/O30). JS was supported by Ifremer. Data on vent fauna from the East Scotia Ridge, Mid‐Cayman Spreading Centre, and Southwest Indian Ridge were obtained by UK natural environment research council Grants NE/D01249X/1, NE/F017774/1 and NE/H012087/1, respectively. REBR's contribution was supported by a Postdoctoral Fellowship at the University of Victoria, funded by the Canadian Healthy Oceans Network II Strategic Research Program (CHONe II). DC is supported by a post‐doctoral scholarship (SFRH/BPD/110278/2015) from FCT. HTR was supported by the Research Council of Norway through project number 70184227 and the KG Jebsen Centre for Deep Sea Research (University of Bergen). MY was partially supported by grants from the Research Grants Council of the Hong Kong Special Administrative Region, China (project codes: HKU 17306014, HKU 17311316).
    Keywords: biodiversity ; collaboration ; conservation ; cross‐ecosystem ; database ; deep sea ; functional trait ; global‐scale ; hydrothermal vent ; sFDvent
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  • 46
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Weber, L., González-Díaz, P., Armenteros, M., Ferrer, V. M., Bretos, F., Bartels, E., Santoro, A. E., & Apprill, A. Microbial signatures of protected and impacted Northern Caribbean reefs: changes from Cuba to the Florida Keys. Environmental Microbiology, 22(1), (2019): 499-519, doi: 10.1111/1462-2920.14870.
    Description: There are a few baseline reef‐systems available for understanding the microbiology of healthy coral reefs and their surrounding seawater. Here, we examined the seawater microbial ecology of 25 Northern Caribbean reefs varying in human impact and protection in Cuba and the Florida Keys, USA, by measuring nutrient concentrations, microbial abundances, and respiration rates as well as sequencing bacterial and archaeal amplicons and community functional genes. Overall, seawater microbial composition and biogeochemistry were influenced by reef location and hydrogeography. Seawater from the highly protected ‘crown jewel’ offshore reefs in Jardines de la Reina, Cuba had low concentrations of nutrients and organic carbon, abundant Prochlorococcus, and high microbial community alpha diversity. Seawater from the less protected system of Los Canarreos, Cuba had elevated microbial community beta‐diversity whereas waters from the most impacted nearshore reefs in the Florida Keys contained high organic carbon and nitrogen concentrations and potential microbial functions characteristic of microbialized reefs. Each reef system had distinct microbial signatures and within this context, we propose that the protection and offshore nature of Jardines de la Reina may preserve the oligotrophic paradigm and the metabolic dependence of the community on primary production by picocyanobacteria.
    Description: We thank Justin Ossolinski, Sean McNally, Tom Lankiewicz, Lázaro García, and the crew from R/V Felipe Poey for assistance with sample collection and processing. We thank Marlin Nauticas and Marinas for the use of their dive facilities. We thank Chris Wright, Mark Band, and staff at the University of Illinois W. M. Keck Center for Comparative and Functional Genomics for sequencing assistance, Karen Selph for training in flow cytometry, Krista Longnecker for TOC and TN analyses, and Joe Jennings for nutrient analyses. Funding was provided to A.A. and A.E.S. by a Dalio Explore award from the Dalio Foundation (now 'OceanX') and analysis time was supported with the NSF Graduate Research Fellowship award to L.W. and NSF award OCE 1736288 to A.A. Research was conducted under the LH112 AN (25) 2015 licence granted by the Cuban Center for Inspection and Environmental Control.
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  • 47
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Xu, X., Li, G., Li, C., Zhang, J., Wang, Q., Simmons, D. K., Chen, X., Wijesena, N., Zhu, W., Wang, Z., Wang, Z., Ju, B., Ci, W., Lu, X., Yu, D., Wang, Q., Aluru, N., Oliveri, P., Zhang, Y. E., Martindale, M. Q., & Liu, J. Evolutionary transition between invertebrates and vertebrates via methylation reprogramming in embryogenesis. National Science Review, 6(5), (2019):993-1003, doi:10.1093/nsr/nwz064.
    Description: Major evolutionary transitions are enigmas, and the most notable enigma is between invertebrates and vertebrates, with numerous spectacular innovations. To search for the molecular connections involved, we asked whether global epigenetic changes may offer a clue by surveying the inheritance and reprogramming of parental DNA methylation across metazoans. We focused on gametes and early embryos, where the methylomes are known to evolve divergently between fish and mammals. Here, we find that methylome reprogramming during embryogenesis occurs neither in pre-bilaterians such as cnidarians nor in protostomes such as insects, but clearly presents in deuterostomes such as echinoderms and invertebrate chordates, and then becomes more evident in vertebrates. Functional association analysis suggests that DNA methylation reprogramming is associated with development, reproduction and adaptive immunity for vertebrates, but not for invertebrates. Interestingly, the single HOX cluster of invertebrates maintains unmethylated status in all stages examined. In contrast, the multiple HOX clusters show dramatic dynamics of DNA methylation during vertebrate embryogenesis. Notably, the methylation dynamics of HOX clusters are associated with their spatiotemporal expression in mammals. Our study reveals that DNA methylation reprogramming has evolved dramatically during animal evolution, especially after the evolutionary transitions from invertebrates to vertebrates, and then to mammals.
    Description: This work was supported by the National Key Research and Development Program of China (2018YFC1003303), the Strategic Priority Research Program of the CAS (XDB13040200), the National Natural Science Foundation of China (91519306, 31425015), the Youth Innovation Promotion Association of the CAS and the Key Research Program of Frontier Sciences, CAS (QYZDY-SSW-SMC016).
    Keywords: DNA methylation ; evolution ; development ; reprogramming
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  • 48
    Publication Date: 2022-05-26
    Description: To provide geoidal topography over the world oceans, a radar altimeter carried by earth satellite is planned. Ground truth calibration will be provided by a grid comprised of the equatorial belt and meridional traverses along the 30°W and 150°W meridians. Ground truth topography is derived from gravity values measured along these traverses. This report presents the free air gravity values and the computed free air anomalies obtained from 62.9°S to 57.5°N along the 150°W meridian.
    Description: Supported by the Office of Naval Research under Contract N00014-66-C0241; NR 083-004.
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 49
    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Staudinger, M. D., Goyert, H., Suca, J. J., Coleman, K., Welch, L., Llopiz, J. K., Wiley, D., Altman, I., Applegate, A., Auster, P., Baumann, H., Beaty, J., Boelke, D., Kaufman, L., Loring, P., Moxley, J., Paton, S., Powers, K., Richardson, D., Robbins, J., Runge, J., Smith, B., Spiegel, C., & Steinmetz, H. The role of sand lances (Ammodytes sp.) in the Northwest Atlantic ecosystem: a synthesis of current knowledge with implications for conservation and management. Fish and Fisheries, 00, (2020): 1-34, doi:10.1111/faf.12445.
    Description: The American sand lance (Ammodytes americanus, Ammodytidae) and the Northern sand lance (A. dubius, Ammodytidae) are small forage fishes that play an important functional role in the Northwest Atlantic Ocean (NWA). The NWA is a highly dynamic ecosystem currently facing increased risks from climate change, fishing and energy development. We need a better understanding of the biology, population dynamics and ecosystem role of Ammodytes to inform relevant management, climate adaptation and conservation efforts. To meet this need, we synthesized available data on the (a) life history, behaviour and distribution; (b) trophic ecology; (c) threats and vulnerabilities; and (d) ecosystem services role of Ammodytes in the NWA. Overall, 72 regional predators including 45 species of fishes, two squids, 16 seabirds and nine marine mammals were found to consume Ammodytes. Priority research needs identified during this effort include basic information on the patterns and drivers in abundance and distribution of Ammodytes, improved assessments of reproductive biology schedules and investigations of regional sensitivity and resilience to climate change, fishing and habitat disturbance. Food web studies are also needed to evaluate trophic linkages and to assess the consequences of inconsistent zooplankton prey and predator fields on energy flow within the NWA ecosystem. Synthesis results represent the first comprehensive assessment of Ammodytes in the NWA and are intended to inform new research and support regional ecosystem‐based management approaches.
    Description: This manuscript is the result of follow‐up work stemming from a working group formed at a two‐day multidisciplinary and international workshop held at the Parker River National Wildlife Refuge, Massachusetts in May 2017, which convened 55 experts scientists, natural resource managers and conservation practitioners from 15 state, federal, academic and non‐governmental organizations with interest and expertise in Ammodytes ecology. Support for this effort was provided by USFWS, NOAA Stellwagen Bank National Marine Sanctuary, U.S. Department of the Interior, U.S. Geological Survey, Northeast Climate Adaptation Science Center (Award # G16AC00237), an NSF Graduate Research Fellowship to J.J.S., a CINAR Fellow Award to J.K.L. under Cooperative Agreement NA14OAR4320158, NSF award OCE‐1325451 to J.K.L., NSF award OCE‐1459087 to J.A.R, a Regional Sea Grant award to H.B. (RNE16‐CTHCE‐l), a National Marine Sanctuary Foundation award to P.J.A. (18‐08‐B‐196) and grants from the Mudge Foundation. The contents of this paper are the responsibility of the authors and do not necessarily represent the views of the National Oceanographic and Atmospheric Administration, U.S. Fish and Wildlife Service, New England Fishery Management Council and Mid‐Atlantic Fishery Management Council. This manuscript is submitted for publication with the understanding that the United States Government is authorized to reproduce and distribute reprints for Governmental purposes. Any use of trade, firm or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
    Keywords: Ammodytes ; ecosystem‐based management ; forage fish ; life history ; sand lance ; trophic ecology
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  • 50
    Publication Date: 2022-05-26
    Description: Presented at 2020 Woods Hole Partnership Education Program (PEP) Symposium, Woods Hole, MA, August 7, 2020
    Description: The water above the Northeast U.S Shelf is home to many different species, and environmental conditions can change the abundance and location of these species. Within our oceans are water masses, pockets of water with their own unique qualities i.e temperature, salinity, etc. The objective of this project was to develop a workflow to identify locations of water masses based on the R/V Endeavor research cruise data. The purpose of this research was to interpret shelf data in order to make analyses efficient for scientists of all professions. The software RStudio was used to create temperature and salinity plots based on the path of the cruise to identify the changes in these parameters. A plot was also created to map the different water masses based on the salinity readings. Users can use the scripts to identify water masses for data from a variety of different time periods, observe the changes and locations of the water masses, and help to understand the changes in biodiversity along the shelf. Link to electronic notebook html: https://ayanna421.github.io/water-masses/. Link to R markdown code: https://github.com/Ayanna421/water-masses. This is a final research presentation for a Northeast U.S. Shelf Long-Term Ecological Research (NES-LTER) project Research Experience for Undergraduate (REU) in the 2020 Woods Hole Partnership Education Program (PEP).
    Description: This work was supported by NSF OCE # 1655686.
    Keywords: underway data ; temperature-salinity plot ; water masses ; shelfbreak front ; Northeast U.S. Shelf ; workflow ; code:R ; electronic notebook
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  • 51
    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Vallecillo-Viejo, I. C., Liscovitch-Brauer, N., Diaz Quiroz, J. F., Montiel-Gonzalez, Maria F., Nemes, Sonya E., Rangan, K. J., Levinson, S. R., Eisenberg, E., & Rosenthal, J. J. C. Spatially regulated editing of genetic information within a neuron. Nucleic Acids Research, (2020): gkaa172, doi: 10.1093/nar/gkaa172.
    Description: In eukaryotic cells, with the exception of the specialized genomes of mitochondria and plastids, all genetic information is sequestered within the nucleus. This arrangement imposes constraints on how the information can be tailored for different cellular regions, particularly in cells with complex morphologies like neurons. Although messenger RNAs (mRNAs), and the proteins that they encode, can be differentially sorted between cellular regions, the information itself does not change. RNA editing by adenosine deamination can alter the genome’s blueprint by recoding mRNAs; however, this process too is thought to be restricted to the nucleus. In this work, we show that ADAR2 (adenosine deaminase that acts on RNA), an RNA editing enzyme, is expressed outside of the nucleus in squid neurons. Furthermore, purified axoplasm exhibits adenosine-to-inosine activity and can specifically edit adenosines in a known substrate. Finally, a transcriptome-wide analysis of RNA editing reveals that tens of thousands of editing sites (〉70% of all sites) are edited more extensively in the squid giant axon than in its cell bodies. These results indicate that within a neuron RNA editing can recode genetic information in a region-specific manner.
    Description: National Science Foundation (NSF) [IOS1557748 to J.R.]; United States–Israel Binational Science Foundation [BSF2013094 to J.R. and E.E.]; The Grass Foundation grant in support of the Doryteuthis pealeii Genome Project, and a gift by Mr. Edward Owens. Funding for open access charge: United States–Israel Binational Science Foundation [BSF2013094].
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  • 52
    Publication Date: 2022-05-26
    Description: Experiments are described to demonstrate a new method of sonic signalling at extremely long ranges in the oceans, utilizing the natural sound channel. Signals were made by causing a four pound charge of TNT to explode at about 4000 feet depth. These signals have the following qualities: (a) Extremely long range transmission (probably 10,000 miles). (b) Signal is positively identifiable. (c) Abrupt termination of the signal allows the arrival time to be read with an accuracy better than l/20th second. This permits location of source to better than a mile, if the signal is received at three suitably located stations. (d) The signal duration is related in such a way to the distance that the distance may be estimated to 30 miles in 1000 from reception at a single station. The limitations are: (a) It is required that the great circle path which the sound follows between source and receiver lie entirely in deep water (probably at least 1000 fathoms). (b) Sound travels in water at a speed of roughly 1 mile per second so that the interval between the origin of the signal and its reception becomes sufficiently great to be a handicap for some uses, particularly with aircraft. The signals were received to distances up to 900 miles. Two receiving arrangements have been used, a hydrophone hung 4000 feet over the side of a ship which was hove to, and a shore connected. hydrophone which lay on bottom 4000 feet deep. Extrapolation of the results indicate a range of at least 10,000 miles from this size charge. Recommendation is made to utilize a network of monitoring stations to locate planes, ships, and life rafts in distress on the open oceans. Three or more stations receiving a signal could locate the source better than one mile.
    Description: Con tract NObs - 2083, Formerly OEM: sr - 31
    Keywords: Underwater acoustics ; Sonar
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  • 53
    Publication Date: 2022-05-26
    Description: Vast amounts of solid CO2 reside in topographic basins of the south polar layered deposits (SPLD) on Mars and exhibit morphological features indicative of glacial flow. Previous experimental studies showed that coarse-grained CO2 ice is 1–2 orders of magnitude weaker than water ice under Martian polar conditions. Here we present data from a series of deformation experiments on high-purity, fine-grained CO2 ice over a broader range of temperatures than previously explored (158–213 K). The experiments confirm previous observations of highly non-linear power-law creep at larger stresses, but also show a transition to a previously-unseen linear-viscous creep regime at lower stresses. We examine the viscosity of CO2 within the SPLD and predict that the CO2-rich layers may be stronger than previously thought. We also predict that CO2 ice flows much more readily than H2O ice on steep flanks of SPLD topographic basins, allowing the CO2 to pond as observed.
    Description: National Aeronautics and Space Administration (NASA) NNH16ZDA001N-SSW
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  • 54
    Publication Date: 2022-05-26
    Description: The purpose of this memorandum is to present the available information on the nature of the bottom off the coasts of California and Hawaii adjacent to the proposed SOFAR stations in the Pacific Ocean, the best probable location for the hydrophones, the probable areas of reception, the positions of fixed land control points, and other information that will facilitate the establishment of an efficient monitoring system. The writer is indebted to the Director and personnel of the U. S. Coast and Geodetic Survey for copies of boat sheets containing soundings, data on the deflection of the vertical, and triangulation station data in the areas involved.
    Description: Contract Nobs 2083
    Keywords: Hydrophone ; Ocean bottom ; Pacific Ocean
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  • 55
    Publication Date: 2022-10-27
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in da Fonseca, R. R., Couto, A., Machado, A. M., Brejova, B., Albertin, C. B., Silva, F., Gardner, P., Baril, T., Hayward, A., Campos, A., Ribeiro, A. M., Barrio-Hernandez, I., Hoving, H. J., Tafur-Jimenez, R., Chu, C., Frazao, B., Petersen, B., Penaloza, F., Musacchia, F., Alexander, G. C., Osorio, H., Winkelmann, I., Simakov, O., Rasmussen, S., Rahman, M. Z., Pisani, D., Vinther, J., Jarvis, E., Zhang, G., Strugnell, J. M., Castro, L. F. C., Fedrigo, O., Patricio, M., Li, Q., Rocha, S., Antunes, A., Wu, Y., Ma, B., Sanges, R., Vinar, T., Blagoev, B., Sicheritz-Ponten, T., Nielsen, R., & Gilbert, M. T. P. A draft genome sequence of the elusive giant squid, Architeuthis dux. Gigascience, 9(1), (2020): giz152. doi: 10.1093/gigascience/giz152.
    Description: Background: The giant squid (Architeuthis dux; Steenstrup, 1857) is an enigmatic giant mollusc with a circumglobal distribution in the deep ocean, except in the high Arctic and Antarctic waters. The elusiveness of the species makes it difficult to study. Thus, having a genome assembled for this deep-sea–dwelling species will allow several pending evolutionary questions to be unlocked. Findings: We present a draft genome assembly that includes 200 Gb of Illumina reads, 4 Gb of Moleculo synthetic long reads, and 108 Gb of Chicago libraries, with a final size matching the estimated genome size of 2.7 Gb, and a scaffold N50 of 4.8 Mb. We also present an alternative assembly including 27 Gb raw reads generated using the Pacific Biosciences platform. In addition, we sequenced the proteome of the same individual and RNA from 3 different tissue types from 3 other species of squid (Onychoteuthis banksii, Dosidicus gigas, and Sthenoteuthis oualaniensis) to assist genome annotation. We annotated 33,406 protein-coding genes supported by evidence, and the genome completeness estimated by BUSCO reached 92%. Repetitive regions cover 49.17% of the genome. Conclusions: This annotated draft genome of A. dux provides a critical resource to investigate the unique traits of this species, including its gigantism and key adaptations to deep-sea environments.
    Description: R.R.F. thanks the Villum Fonden for grant VKR023446 (Villum Fonden Young Investigator Grant), the Portuguese Science Foundation (FCT) for grant PTDC/MAR/115347/2009; COMPETE-FCOMP-01-012; FEDER-015453, Marie Curie Actions (FP7-PEOPLE-2010-IEF, Proposal 272927), and the Danish National Research Foundation (DNRF96) for its funding of the Center for Macroecology, Evolution, and Climate. H.O. thanks the Rede Nacional de Espectrometria de Massa, ROTEIRO/0028/2013, ref. LISBOA-01-0145-FEDER-022125, supported by COMPETE and North Portugal Regional Operational Programme (Norte2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (ERDF). A.C. thanks FCT for project UID/Multi/04423/2019. M.P. acknowledges the support from the Wellcome Trust (grant number WT108749/Z/15/Z) and the European Molecular Biology Laboratory. M.P.T.G. thanks the Danish National Research Foundation for its funding of the Center for GeoGenetics (grant DNRF94) and Lundbeck Foundation for grant R52–5062 on Pathogen Palaeogenomics. S.R. was supported by the Novo Nordisk Foundation grant NNF14CC0001. A.H. is supported by a Biotechnology and Biological Sciences Research Council David Phillips Fellowship (fellowship reference: BB/N020146/1). T.B. is supported by the Biotechnology and Biological Sciences Research Council-funded South West Biosciences Doctoral Training Partnership (training grant reference BB/M009122/1). This work was partially funded by the Lundbeck Foundation (R52-A4895 to B.B.). H.J.T.H. was supported by the David and Lucile Packard Foundation, the Netherlands Organization for Scientific Research (#825.09.016), and currently by the Deutsche Forschungsgemeinschaft (DFG) under grant HO 5569/2-1 (Emmy Noether Junior Research Group). T.V. and B. Brejova were supported by grants from the Slovak grant agency VEGA (1/0684/16, 1/0458/18). F.S. was supported by a PhD grant (SFRH/BD/126560/2016) from FCT. A.A. was partly supported by the FCT project PTDC/CTA-AMB/31774/2017. C.C. and Y.W. are partly supported by grant IIS-1526415 from the US National Science Foundation. Computation for the work described in this article was partially supported by the DeiC National Life Science Supercomputer at DTU.
    Keywords: Cephalopod ; Invertebrate ; Genome assembly
    Repository Name: Woods Hole Open Access Server
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  • 56
    Publication Date: 2022-10-27
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Ritschard, E. A., Whitelaw, B., Albertin, C. B., Cooke, I. R., Strugnell, J. M., & Simakov, O. Coupled genomic evolutionary histories as signatures of organismal innovations in cephalopods: co-evolutionary signatures across levels of genome organization may shed light on functional linkage and origin of cephalopod novelties. BioEssays, 41, (2019): 1900073, doi: 10.1002/bies.201900073.
    Description: How genomic innovation translates into organismal organization remains largely unanswered. Possessing the largest invertebrate nervous system, in conjunction with many species‐specific organs, coleoid cephalopods (octopuses, squids, cuttlefishes) provide exciting model systems to investigate how organismal novelties evolve. However, dissecting these processes requires novel approaches that enable deeper interrogation of genome evolution. Here, the existence of specific sets of genomic co‐evolutionary signatures between expanded gene families, genome reorganization, and novel genes is posited. It is reasoned that their co‐evolution has contributed to the complex organization of cephalopod nervous systems and the emergence of ecologically unique organs. In the course of reviewing this field, how the first cephalopod genomic studies have begun to shed light on the molecular underpinnings of morphological novelty is illustrated and their impact on directing future research is described. It is argued that the application and evolutionary profiling of evolutionary signatures from these studies will help identify and dissect the organismal principles of cephalopod innovations. By providing specific examples, the implications of this approach both within and beyond cephalopod biology are discussed.
    Description: E.A.R. and O.S. are supported by the Austrian Science Fund (Grant No. P30686‐B29). E.A.R. is supported by Stazione Zoologica Anton Dohrn (Naples, Italy) PhD Program. The authors wish to thank Graziano Fiorito (SZN, Italy), Hannah Schmidbaur (University of Vienna, Austria), Thomas Hummel (University of Vienna, Austria) for many insightful comments and reading of the draft manuscript. The authors would like to apologize to all colleagues whose work has been omitted due to space constraints.
    Keywords: Cephalopod ; Gene duplication ; Genome rearrangement ; Novel gene ; Organismal innovation
    Repository Name: Woods Hole Open Access Server
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  • 57
    Publication Date: 2022-10-27
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Arenas Gómez, Claudia M., Sabin, K. Z., & Echeverri, K. Wound healing across the animal kingdom: Crosstalk between the immune system and the extracellular matrix. Developmental Dynamics, (2020): 1-13, doi:10.1002/dvdy.178.
    Description: Tissue regeneration is widespread in the animal kingdom. To date, key roles for different molecular and cellular programs in regeneration have been described, but the ultimate blueprint for this talent remains elusive. In animals capable of tissue regeneration, one of the most crucial stages is wound healing, whose main goal is to close the wound and prevent infection. In this stage, it is necessary to avoid scar formation to facilitate the activation of the immune system and remodeling of the extracellular matrix, key factors in promoting tissue regeneration. In this review, we will discuss the current state of knowledge regarding the role of the immune system and the interplay with the extracellular matrix to trigger a regenerative response.
    Description: The research in the Echeverri lab is supported NIH NCID R01 to Karen Echeverri and start‐up funds from the MBL. Keith Z. Sabin has been supported by an NIH T32 GM113846 grant.
    Keywords: Extracellular matrix ; Immune system ; Regeneration ; Wound healing
    Repository Name: Woods Hole Open Access Server
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  • 58
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Munoz, S. E., Porter, T. J., Bakkelund, A., Nusbaumer, J., Dee, S. G., Hamilton, B., Giosan, L., & Tierney, J. E. Lipid biomarker record documents hydroclimatic variability of the Mississippi River Basin during the common era. Geophysical Research Letters, 47(12), (2020): e2020GL087237, doi:10.1029/2020GL087237.
    Description: Floods and droughts in the Mississippi River basin are perennial hazards that cause severe economic disruption. Here we develop and analyze a new lipid biomarker record from Horseshoe Lake (Illinois, USA) to evaluate the climatic conditions associated with hydroclimatic extremes that occurred in this region over the last 1,800 years. We present geochemical proxy evidence of temperature and moisture variability using branched glycerol dialkyl glycerol tetraethers (brGDGTs) and plant leaf wax hydrogen isotopic composition (δ2Hwax) and use isotope‐enabled coupled model simulations to diagnose the controls on these proxies. Our data show pronounced warming during the Medieval era (CE 1000–1,600) that corresponds to midcontinental megadroughts. Severe floods on the upper Mississippi River basin also occurred during the Medieval era and correspond to periods of enhanced warm‐season moisture. Our findings imply that projected increases in temperature and warm‐season precipitation could enhance both drought and flood hazards in this economically vital region.
    Description: This project was supported by grants to S. E. M and L. G. (NSF EAR‐1804107), T. J. P. (NSERC Discovery Grant), and S. G. D. (NOAA‐NA18OAR4310427).
    Keywords: Lipid biomarker ; Leaf wax ; BrGDGT ; Common Era ; Paleoclimate ; Hydroclimate
    Repository Name: Woods Hole Open Access Server
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  • 59
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Bowen, J. C., Ward, C. P., Kling, G. W., & Cory, R. M. Arctic amplification of global warming strengthened by sunlight oxidation of permafrost carbon to CO2. Geophysical Research Letters, 47(12), (2020): e2020GL087085, doi:10.1029/2020GL087085.
    Description: Once thawed, up to 15% of the ∼1,000 Pg of organic carbon (C) in arctic permafrost soils may be oxidized to carbon dioxide (CO2) by 2,100, amplifying climate change. However, predictions of this amplification strength ignore the oxidation of permafrost C to CO2 in surface waters (photomineralization). We characterized the wavelength dependence of permafrost dissolved organic carbon (DOC) photomineralization and demonstrate that iron catalyzes photomineralization of old DOC (4,000–6,300 a BP) derived from soil lignin and tannin. Rates of CO2 production from photomineralization of permafrost DOC are twofold higher than for modern DOC. Given that model predictions of future net loss of ecosystem C from thawing permafrost do not include the loss of CO2 to the atmosphere from DOC photomineralization, current predictions of an average of 208 Pg C loss by 2,299 may be too low by ~14%.
    Description: This research was supported by National Science Foundation (NSF) CAREER 1351745 (R.M.C.), DEB 1637459 and 1754835 (G.W.K.), the Camille and Henry Dreyfus Postdoctoral Program in Environmental Chemistry (R.M.C. and C.P.W.), the Frank and Lisina Hock Endowed Fund (C.P.W.), and the NOSAMS Graduate Student Internship Program (J.C.B.).
    Keywords: Photochemistry ; Permafrost ; Arctic ; Carbon cycling ; Dissolved organic carbon
    Repository Name: Woods Hole Open Access Server
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  • 60
    Publication Date: 2022-10-20
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Martins, M. C. I., Miller, C., Hamilton, P., Robbins, J., Zitterbart, D. P., & Moore, M. Respiration cycle duration and seawater flux through open blowholes of humpback (Megaptera novaeangliae) and North Atlantic right (Eubalaena glacialis) whales. Marine Mammal Science, (2020): 1-20, doi:10.1111/mms.12703.
    Description: Little is known about the dynamics of baleen whale respiratory cycles, especially the mechanics and activity of the blowholes and their interaction with seawater. In this study, the duration of complete respiration cycles (expiration/inhalation events) were quantified for the first time in two species: North Atlantic right whale (NARW) and humpback whale (HW) using high resolution, detailed imagery from an unoccupied aerial system (UAS). The mean duration of complete respiration cycles (expiration/inhalation event) in the NARW and HW were 3.07 s (SD = 0.503, n = 15) and 2.85 s (SD = 0.581, n = 21), respectively. Furthermore, we saw no significant differences in respiration cycle duration between age and sex classes in the NARW, but significant differences were observed between age classes in the HW. The observation of seawater covering an open blowhole was also quantified, with NARW having 20% of all breaths with seawater presence versus 90% in HW. Seawater incursion has not been described previously and challenges the general consensus that water does not enter the respiratory tract in baleen whales. Prevalent seawater has implications for the analysis and interpretation of exhaled respiratory vapor/mucosa samples, as well as for the potential inhalation of oil in spills.
    Description: Samples were collected under NMFS NOAA Permits 17355, 17355‐01, and 21371, and with approval from the Woods Hole Oceanographic Institution Institutional Animal Care and Use Committee. Funding by Ocean Life Institute of the Woods Hole Oceanographic Institution, NOAA NA14OAR4320158 and University College London Master of Research in Biodiversity, Evolution and Conservation program.
    Keywords: Humpback whale ; North Atlantic right whale ; Respiratory cycle ; Respiratory health ; Unoccupied aerial systems
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  • 61
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Huynh, A., Maktabi, B., Reddy, C. M., O'Neil, G. W., Chandler, M., & Baki, G. Evaluation of alkenones, a renewably sourced, plant-derived wax as a structuring agent for lipsticks. International Journal of Cosmetic Science, (2020), doi:10.1111/ics.12597.
    Description: OBJECTIVE Waxes are used as structuring agents in lipsticks. There are a variety of waxes combined in a single lipstick to provide good stability, pleasant texture and good pay‐off. Due to a significant growth for natural, green and sustainable products, there is a constant search for alternatives to animal‐derived and petroleum‐derived ingredients. In this study, a green, non‐animalderived wax, namely long‐chain ketones (referred to as alkenones), sourced from marine microalgae was formulated into lipsticks and evaluated as a structuring agent. METHODS Alkenones were used as a substitute for microcrystalline wax, ozokerite and candelilla wax, typical structuring agents. In total, 384 lipsticks were formulated: L1 (control, no alkenones), L2 (alkenones as a substitute for ozokerite), L3 (alkenones as a substitute for microcrystalline wax) and L4 (alkenones as a substitute for candelilla wax). Products were tested for hardness (bending force), stiffness, firmness (needle penetration), pay‐off (using a texture analyser and a consumer panel), friction, melting point and stability for 12 weeks at 25 and 45°C. RESULTS Alkenones influenced each characteristic evaluated. In general, lipsticks with alkenones (L2‐L4) became softer and easier to bend compared to the control (L1). In terms of firmness, lipsticks were similar to the control, except for L4, which was significantly (P 〈 0.05) firmer. The effect on pay‐off was not consistent. L2 and L3 had higher pay‐off to skin and fabric than L1. In addition, L4 had the lowest amount transferred, but it still had the highest colour intensity on skin. Alkenones influenced friction (glide) positively; the average friction decreased for L2‐L4. The lowest friction (i.e. best glide) was shown in L4. Melting point of the lipsticks was lower when alkenones were present. Overall, L4, containing 7% of 4 alkenones in combination with microcrystalline wax, ozokerite and carnauba wax, was found to have the most desirable attributes, including ease of bending, high level of firmness, low pay‐off in terms of amount, high colour intensity on skin and low friction (i.e. better glide). Consumers preferred L4 the most overall. CONCLUSION Results of this study indicate that alkenones offer a sustainable, non‐animal and non‐petroleum‐derived choice as a structuring agent for lipsticks.
    Description: The authors would like to thank Texture Technologies for the technical assistance provided during this project. This research was funded by the Washington Research Foundation and a private donor from friends of the Woods Hole Oceanographic Institution, grant number N‐127244.
    Keywords: Colour cosmetics ; Formulation/stability ; Statistics ; Alkenones ; Lipstick
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  • 62
    Publication Date: 2022-05-27
    Description: NSF EarthCube Workshop for Shipboard Ocean Time Series Data, C-MORE Hale Center, Honolulu, HI, September 13-15, 2019
    Description: Prior to the OceanObs’19 Meeting, the Ocean Carbon and Biogeochemistry (OCB) Project Office planned and hosted an NSF EarthCube Workshop focused on shipboard ocean time series data (https://www.us-ocb.org/earthcube-workshop-ocean-time-series-data/). Data synthesis and modeling efforts across ocean time series represent important and necessary steps forward in broadening our view of a changing ocean, and maximizing the return on our continued investment in these programs. Despite the scientific insights and technology advances of the past couple of decades, significant barriers remain that hinder important synthesis work across time series. This workshop convened 37 participants, including seagoing oceanographers, data managers, and experts in data science and informatics. The goal of the workshop was to identify key ocean time series data challenges related to access and discoverability, metadata reporting, interoperability across databases, and broadening users; and developing recommendations to address those challenges. The workshop adopted the FAIR (Findable, Accessible, Interoperable, Reusable; Wilkinson et al., 2016) Guiding Principles to frame these issues, and included presentations on existing data models and use of controlled vocabularies, guidelines and frameworks for conducting data synthesis and establishing community best practices, and existing and planned ocean time series data products.
    Description: The authors wish to acknowledge NSF EarthCube for the workshop funding and Michael Sieracki (NSF Biological Oceanography) and Hedy Edmonds (NSF Chemical Oceanography) for connecting us with this opportunity. We thank David Karl, Angelicque White, Jennifer Kondo, and all of our wonderful hosts at the C-MORE Hale Center at the University of Hawaii. EarthCube Science Committee representatives Emma Aronson and D. Sarah Stamps provided valuable input throughout the planning of the workshop. Although unable to attend, organizing committee member Rod Johnson also provided assistance with the content and organization of the workshop. We thank the workshop participants for stimulating discussions.
    Repository Name: Woods Hole Open Access Server
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  • 63
    Publication Date: 2022-08-15
    Description: The attenuation coefficient b is one of the most common ways to describe how strong the carbon flux is attenuated throughout the water column. Therefore, b is an essential input variable in many carbon flux and climate models. Marsay et al. (2015, https://doi.org/10.1073/pnas.1415311112) proposed that the median surface water temperature (0–500 m) may be a predictor of b, but our observations from Arctic waters challenge this hypothesis. We found a highly variable attenuation coefficient (b = 0.43–1.84) in cold Arctic waters (〈4.1 °C). Accordingly, we suggest that water temperature is not a globally valid predictor of the attenuation coefficient. We advocate instead that the phytoplankton composition and especially the relative abundance of diatoms can be used to parametrize the carbon flux attenuation in local and global carbon flux models.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , NonPeerReviewed
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  • 64
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: Late in 1955 the Deep Water Propagation Committee recommended procurement of 10 sets of sound analysis equipment to be distributed to laboratories working in the field of underwater acoustics. This recommendation was made to be one of the objectives of Contract Nonr-2129. The equipment, including filters for spectrum analysis, was to compute the time integral of the square of the filter output voltages as discussed by Officer and Dietz (1953), WHOI Ref. No. 53-46. In view of the fact that correlation studies are becoming more important it was recommended that the equipment have an optional mode of operation in which it could compute the time integral of the product of two voltages. Multichannel computers were recommended because analysis of data from one hydrophone for one frequency band at one time is much too slow in view of the large amount of data to be processed. Eight channels per computer were chosen because this is the largest number available in standard direct-writing recorders.
    Description: Undersea Warfare Branch, Office of Naval Research, under Contract Nonr- 2129(00) (NR 261-104).
    Keywords: Sound analyzers ; Sonar
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 65
    Publication Date: 2022-05-26
    Description: Land-based High Frequency (HF) Radars provide critically important observations of the coastal ocean that will be adversely affected by the spinning blades of utility-scale wind turbines. Pathways to mitigate the interference of turbines on HF radar observations exist for small number of turbines; however, a greatly increased pace of research is required to understand how to minimize the complex interference patterns that will be caused by the large arrays of turbines planned for the U.S. outer continental shelf. To support the U.S.’s operational and scientific needs, HF radars must be able to collect high-quality measurements of the ocean’s surface inand around areas with significant numbers of wind turbines. This is a solvable problem, but given the rapid pace of wind energy development, immediate action is needed to ensure that HF radar wind turbine interference mitigation efforts keep pace with the planned build out of turbines.
    Repository Name: Woods Hole Open Access Server
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  • 66
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: Pendulum Program: During subject period Dr. Rose completed the rebuilding of the recording system for the pendulum so that visual records could be obtained with a standard oscillograph type camera. The first teat runs with this equipment showed that the accuracy of observataion was materially improved in that the period could be read with greater precision than was obtainable with the Berkeley counter direct read out system. A field run was made the last of October, which included observations at the following sites: Madison, Wisconsin Washington, D. C. Charleston, S. C. Key West, Florida Lamont Geological Observatory, N. Y. Otta, Canada Measurements were taken on a repeat basis on the return leg at each site and the reliability on the basis of a statistical analysis of the results was approximately 0.1 mgal.
    Description: Contract AF19(604) 2157 with the Geophysics Research Directorate Air Force Cambridge Research Center Air Research and Development Command
    Keywords: Gravity--Measurement
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    Type: Technical Report
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  • 67
    Publication Date: 2022-05-26
    Description: This is a progress report of the Institution's research between April and 30 June 1961 supported under Contract NObsr-72521 with the Bureau of Ships, Navy Department. The program consists of studies of compressional wave transmission (sound and seismic waves) through sea water and the underlying earth's crust, the ambient noise of the ocean, and the scattering of sound in the sea and beneath the ocean floor. During the present reporting period sound transmission studies have included laboratory analysis of data taken previously in a continuing program directed toward describing near-surface transmission into the shadow zone, and toward accounting for the variability of near-surface . transmission under nominally "good" sonar conditions . Seismic studies consisted of analysis of seismic refraction data taken two years ago in: the Mediterranean, completion of a report of a seismic reflection study of the southern part of Narragansett Bay, extension of this latter study into Rhode Island Sound, and a series of new measurements of the apparent reflectivity of the bottom at 12 kcps. In the sound-scattering program we accepted delivery of a small towed fish containing sound gear for scattering experiments over near-horizontal paths. This instrument was taken to sea on CHAIN for initial testing and self-noise measurements. A series of tests of new sound sources, supported under Contract Nonr-1367, have demonstrated that seismic reflection observations can be made in deep ocean basins from a ship underway slowly using only such electrically-powered sources as Thumper or Sparker. Sub-bottom structures have been mapped in fine detail experimentally in water over 2600 fathoms deep. This work was done with a Thumper having a 5000-joule electrical input . Plans have been made for increasing the electrical input of Thumper to about 13, 000 joules and Sparker to 25, 000 joules. We plan to use these new sound sources in sound transmission experiments this summer and fall in the Mediterranean Sea. As an extra-curricular hobby Miss Broughton, a technical assistant at the Institution, made interesting magnetic tape recordings of the sounds of a small pilot whale stranded on a local beach. She held microphones on the whale's head near the blow hole. The recorded sounds are rather different from those heard through the water near pilot whales. These and other parts of our work are detailed below.
    Description: Bureau of Ships Under Contract NObsr-72521
    Keywords: Sonar ; Underwater acoustics ; Submarine geology
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  • 68
    Publication Date: 2022-05-26
    Description: This is a status report for the six-month's period indicated. It includes the closing phase of a long cruise of CHAIN to the Mediterranean Sea during which circulation of the waters of the eastern Mediterranean were studied and sound transmission, seismic reflection, and shallow thermal structure measurements were made at various places in the Mediterranean and the North Atlantic. During the remainder of the period various geophysical, geological, and hydroacoustical analyses were conducted at Woods Hole and preparations for the summer cruising season were made.
    Description: The Undersea Warfare Branch Office of Naval Research Under Contracts Nonr - 1367 (OO)NR261-102 and Nonr-2129(00)NR261-104
    Keywords: Underwater acoustics
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  • 69
    Publication Date: 2022-05-26
    Description: The successful promulgation of any regional gravity program carried out with gravimeters depends upon several factors. These can be described as (1) instrumental characteristics, (2) calibration standard, (3) method of survey, and (4) reduction procedure. It is assumed the instrument is reliable, has adequate range, and that the observer takes normal precautions to secure good data. Although much research has been devoted to the study of the effect of slight imperfections in the pitch of the reading dial screw, reading dial graduation error, effect of pressure and temperature changes on instrumental drift rate and readings, linearity of response, and calibration stability, all that has been ascertained is that each instrument constitutes an individual problem, and that no 'two instruments have the same characteristics although in gross terms they may be identical. Therefore, in order for data obtained using several gravimeters, or data obtained by several unrelated groups to be integrated it is necessary that there be some standards for either evaluating the instruments used directly or the data obtained through spot check observations with a standardized instrument.
    Description: Contract AF 08 (614) • 2923 with the Air Force 138lst Geodetic Squadron, Air Photo and Charting Service, Orlando A.F .B. • Florida
    Keywords: Gravity
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  • 70
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: This report describes the Sweep-Synchronized Positionable Trigger, together with its functions and supplementary components, as designed and built for use with the Precision Graphic Recorder (PGR) at the Woods Hole Oceanographic Institution. The positionable trigger provides a means for plotting a variable on the PGR record as a function of time, for triggering equipment such as oscilloscopes at any time, for displaying ship's heading, and for supplying, semi-automatically, ocean depth to a ship- board computer.
    Description: The Office of Naval Research under Contract Nonr- 40 29(00)
    Keywords: Recording instruments
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  • 71
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: An evaluation was made of the importance of marine zooplankton in elemental cycling and transport of elements through the thermocline. Zooplankton density was measured in the eastern Pacific Ocean. Some measurement of elemental elimination rates were made using zooplankton labeled by fallout from a nuclear test; other measurements used animals tagged with tracer Il31 or ca58. The turnover time for cobalt in the upper 100 m of the sea is not more than 100 years based on cobalt flux rates in zooplankton alone (U).
    Description: U. S. Atomic Energy Commission contract AT(30-l) -3145
    Keywords: Zooplankton ; Marine ecology
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  • 72
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: The theory of oblique-angle seismic reflectivity, as applied to oceanographic research, is presented. An experiment has been developed in which continuous oblique reflection profiles were made by towing an acoustic source behind a ship and listening with a hydrophone suspended beneath a free-floating radio buoy. Information received at the hydrophone was transmitted to the ship and recorded on magnetic tape. Energies of the bottom-reflected signals have been calculated for varying angles of incidence and the corresponding reflectivities produced. Results from the Tyrrhenian Sea and from north of Puerto Rico indicate the possibility that the sound velocity in the first-layer sediments is less than the sound velocity of the bottom water.
    Description: The Bureau of Ships Under Contract NObsr-89464
    Keywords: Marine sediments
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  • 73
    Publication Date: 2022-05-26
    Description: The Deep Submergence Research Program at Woods Hole Oceanographic Institution (WHOI) entered into the first full operational year during 1966. ALVIN and the support catamaran underwent modification and overhaul during the winter months. ALVIN played a key role in the successful recovery of an H-Bomb lost in the sea off Palomares, Spain. This operation is reported in some detail . ALVIN then embarked on a series of dives supported by the catamaran . One series off Bermuda was to inspect the ARTEMIS array. Transit was then made to Tongue-of-the-Ocean (TOTO) in the Bahamas. There portions of the AUTEC range were inspected, several WHOI science dives were made, and a diving program carried out for the Naval Oceanographic Office (NAVOCEANO) . After tow back to Woods Hole, two science dives were made and both ALVIN and the catamaran went into an extensive refit and inspection period. The plans for this activity are reported in some detail. A new ALVIN-type submersible is under design and construction at Electric Boat Division of General Dynamics Corporation.
    Description: The Office of Naval Research under Contract Nonr-3484(00) NR 260-107.
    Keywords: Manned undersea research stations ; Oceanographic submersibles
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 74
    facet.materialart.
    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: Also published as: Buoy Technology, Transactions 2nd International Buoy Technology Symposium/Exposition, Washington, D.C., September 18-20, 1967, pp.409-418, 1967.
    Description: Since January 1965,a program has been underway at the Woods Hole Oceanographic Institution, to measure currents at a limited number of fixed sites on a year round basis. Initially, one site was instrumented with both surface and subsurface moorings. The program has now been expanded to 4 major sites, extending along 70°W, from 39°20 ' N to the Hatteras Abyssal Plain at 30°N . In nearly three years of operation, a total of 65 moorings have been placed at the working sites, for periods up to six months. Recoveries from these sites have provided many velocity records of excellent quality. The repetitive exposure of moorings of essentially similar design under relatively standardized conditions has served to define clearly the design and operational problems that are inherent in such a program. A brief account is given of some of the problems encountered in routine buoy setting operations, and some of the results obtained from the measurements.
    Description: The Office of Naval Research under Contract N00014-66-C0241~ NR 083-004.
    Keywords: Ocean currents ; Oceanographic buoys
    Repository Name: Woods Hole Open Access Server
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  • 75
    Publication Date: 2022-05-26
    Description: Hoagland, Porter; Jin, Di; Holland, Michael; Kostel, Ken; Taylor, Eric; Renier, Natalie; Holmes, Mark. 2019. Value beyond view: illuminating the human benefits of the ocean twilight zone. Woods Hole Oceanographic Institution, 35 pp.
    Description: The twilight zone is a fundamental part of the ocean ecosystem, playing an important role in carbon sequestration and marine food webs and supporting the natural function of many planetary processes. Ecosystem services provided by the twilight zone are highly beneficial to humans, but they occur largely out of sight and they are undervalued by society as a result. To better evaluate the benefits that the twilight zone provides, an ecosystem service framework provides a way to organize our thinking about them and even to quantify their economic value. With this information at hand, leaders and policymakers can think more carefully about what we stand to gain or lose from actions that affect the twilight zone and the broader ocean environment to which it is tightly linked, particularly as we strive for the sustainable use of marine resources. The title was changed from "Ecosystem Services of the Mesopelagic" to "Value beyond view: illuminating the human benefits of the ocean twilight zone."
    Repository Name: Woods Hole Open Access Server
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  • 76
    Publication Date: 2022-05-26
    Description: Presented at Data Curation Network, May 15, 2020
    Description: At domain-specific data repositories, curation that strives for FAIR principles often entails transforming data submissions to improve understanding and reuse. The Biological and Chemical Oceanography Data Management Office (BCO-DMO, https://www.bco-dmo.org) has been adopting the data containerization specification of the Frictionless Data project (https://frictionlessdata.io) in an effort to improve its data curation process efficiency. In doing so, BCO-DMO has been using the Frictionless Data Package Pipelines library (https://github.com/frictionlessdata/datapackage-pipelines) to define the processing steps that transform original submissions to final data products. Because these pipelines are defined using a declarative language they can be serialized into formal provenance data structures using the Provenance Ontology (PROV-O, https://www.w3.org/TR/prov-o/). While there may still be some curation steps that cannot be easily automated, this method is a step towards reproducible transforms that bridge the original data submission to its published state in machine-actionable ways that benefit the research community through transparency in the data curation process. BCO-DMO has built a user interface on top of these modular tools for making it easer for data managers to process submission, reuse existing workflows, and make transparent the added value of domain-specific data curation.
    Description: NSF #1924618
    Keywords: Data Curation ; Provenance ; Workflows ; Frictionless Data ; Data management ; Data repository
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  • 77
    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Beckman, N. G., Asian, C. E., Rogers, H. S., Kogan, O., Bronstein, J. L., Bullock, J. M., Hartig, F., HilleRisLambers, J., Zhou, Y., Zurell, D., Brodie, J. F., Bruna, E. M., Cantrell, R. S., Decker, R. R., Efiom, E., Fricke, E. C., Gurski, K., Hastings, A., Johnson, J. S., Loiselle, B. A., Miriti, M. N., Neubert, M. G., Pejchar, L., Poulsen, J. R., Pufal, G., Razafindratsima, O. H., Sandor, M. E., Shea, K., Schreiber, S., Schupp, E. W., Snell, R. S., Strickland, C., & Zambrano, J. Advancing an interdisciplinary framework to study seed dispersal ecology. Aob Plants, 12(2), (2020): plz048, doi:10.1093/aobpla/plz048.
    Description: Although dispersal is generally viewed as a crucial determinant for the fitness of any organism, our understanding of its role in the persistence and spread of plant populations remains incomplete. Generalizing and predicting dispersal processes are challenging due to context dependence of seed dispersal, environmental heterogeneity and interdependent processes occurring over multiple spatial and temporal scales. Current population models often use simple phenomenological descriptions of dispersal processes, limiting their ability to examine the role of population persistence and spread, especially under global change. To move seed dispersal ecology forward, we need to evaluate the impact of any single seed dispersal event within the full spatial and temporal context of a plant’s life history and environmental variability that ultimately influences a population’s ability to persist and spread. In this perspective, we provide guidance on integrating empirical and theoretical approaches that account for the context dependency of seed dispersal to improve our ability to generalize and predict the consequences of dispersal, and its anthropogenic alteration, across systems. We synthesize suitable theoretical frameworks for this work and discuss concepts, approaches and available data from diverse subdisciplines to help operationalize concepts, highlight recent breakthroughs across research areas and discuss ongoing challenges and open questions. We address knowledge gaps in the movement ecology of seeds and the integration of dispersal and demography that could benefit from such a synthesis. With an interdisciplinary perspective, we will be able to better understand how global change will impact seed dispersal processes, and potential cascading effects on plant population persistence, spread and biodiversity.
    Description: Ideas for this manuscript initiated during the Seed Dispersal Workshop held in May 2016 at the Socio-Environmental Synthesis Center in Annapolis, MD and supported by the US National Science Foundation Grant DEB-1548194 to N.G.B. and the National Socio-Environmental Synthesis Center under the US National Science Foundation Grant DBI-1052875. D.Z. received funding from the Swiss National Science Foundation (SNF, grant: PZ00P3_168136/1) and from the German Science Foundation (DFG, grant: ZU 361/1-1).
    Keywords: Analytical models ; demography ; global change ; individual-based models ; long-distance seed dispersal ; population models ; seed dispersal
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  • 78
    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Sosa, O. A., Burrell, T. J., Wilson, S. T., Foreman, R. K., Karl, D. M., & Repeta, D. J. Phosphonate cycling supports methane and ethylene supersaturation in the phosphate-depleted western North Atlantic Ocean. Limnology and Oceanography, (2020), doi:10.1002/lno.11463.
    Description: In oligotrophic ocean regions, dissolved organic phosphorus (DOP) plays a prominent role as a source of phosphorus (P) to microorganisms. An important bioavailable component of DOP is phosphonates, organophosphorus compounds with a carbon‐phosphorus (C‐P) bond, which are ubiquitous in high molecular weight dissolved organic matter (HMWDOM). In addition to being a source of P, the degradation of phosphonates by the bacterial C‐P lyase enzymatic pathway causes the release of trace hydrocarbon gases relevant to climate and atmospheric chemistry. In this study, we investigated the roles of phosphate and phosphonate cycling in the production of methane (CH4) and ethylene (C2H4) in the western North Atlantic Ocean, a region that features a transition in phosphate concentrations from coastal to open ocean waters. We observed an inverse relationship between phosphate and the saturation state of CH4 and C2H4 in the water column, and between phosphate and the relative abundance of the C‐P lyase marker gene phnJ . In phosphate‐depleted waters, methylphosphonate and 2‐hydroxyethylphosphonate, the C‐P lyase substrates that yield CH4 and C2H4, respectively, were readily degraded in proportions consistent with their abundance and bioavailability in HMWDOM and with the concentrations of CH4 and C2H4 in the water column. We conclude that phosphonate degradation through the C‐P lyase pathway is an important source and a common production pathway of CH4 and C2H4 in the phosphate‐depleted surface waters of the western North Atlantic Ocean and that phosphate concentration can be an important control on the saturation state of these gases in the upper ocean.
    Description: We thank the captain and crew of the R/V Neil Armstrong and chief scientist Benjamin Van Mooy for supporting and leading research at sea. Chiara Santinelli and Eric Grabowski provided analyses of dissolved organic carbon. This research was funded by NSF Chemical Oceanography award OCE‐1634080 to D.J.R. Additional support was provided by the Gordon and Betty Moore Foundation grant 3794 to D.M.K. and grant 6000 to D.J.R., and the Simons Collaboration on Ocean Processes and Ecology (SCOPE) program grant 329108 to D.M.K., E.F.D., and D.J.R.
    Repository Name: Woods Hole Open Access Server
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  • 79
    facet.materialart.
    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: The use of the natural sound channel in the oceans in transmitting sound signals over distances as great as 3000 miles is known as SOFAR. The sound signal is initiated at the axis of the sound channel by some sort of bomb and the signal so generated is picked up at great distance by a hydrophone lying at or near the axis of the channel. It is the purpose of this paper to discuss the design and performance of the bombs developed to date for use in SOFAR. The bombs fall into two general classes, namely explosion bombs and implosion bombs. Explosion bombs consist of a detonator which by means of a booster fires a main charge usually of TNT or other high explosive. The only practical method of actuating the detonator at the present time is on the basis of pressure, the detonator being designed to fire at a pressure corresponding to that at the sound channel axis. As the depth of the axis varies with the geographical location it is necessary that the detonator be replaceable or that it be adjustable to meet the requirements of a given area. Typical firing depth requirements to be met are 100 fathoms in the temperate latitudes in tho Atlantic and 350 fathoms in corresponding latitudes in the Pacific. Explosion bombs have varied in design from uncased demolition blocks fired by a simple dotonator to a cast charge of TNT in a pressure proof case fired by an intricate mechanism with elaborate safety devices. Detonators have been principally of three types; (1) the Woods Hole pressure detonator, (2) the diaphram-percussion pin, and (3) the bourdon-electric. Implosion bombs consist of empty containers designed to collapse at or near the axis of the sound channel and thus to release sound energy. It is not know how efficient this sound source is as development work on it has been somewhat limited. The advantages of this device is that it is perfectly safe to use under all conditions, and that it is simple to manufacture. The main disadvantage is that it is rather bulky.
    Description: Work carried out under contract NObs - 2083 formerly OENsr-31 for Bureau of Ships, Navy Department.
    Keywords: Bombs ; Sound -- Transmission ; Bombs Sound -- Transmission Detonators
    Repository Name: Woods Hole Open Access Server
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  • 80
    Publication Date: 2022-05-26
    Description: The first sounds to arrive at the receiver commence at low intensity and with long intervals between them. Gradually 1 the interval shortens, the sounds become louder until they blend in to one loud sound which ceases abruptly. This peak cut-off is so marked, that when recorded on suitable equipment synchronized with an accurate time piece, the instant of its occurrence may be determined within an accuracy of .01 seconds. In this report, all computations will be based on this interval as a limit of accuracy attainable.
    Description: Work carried out under Contract NObs 2083, formerly OEMsr-31, for Bureau of Ships, Navy Department.
    Keywords: Sound -- Transmission
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  • 81
    Publication Date: 2022-05-26
    Description: Presented at USGS Data Management Working Group, 9, November 2020
    Description: At domain-specific data repositories, curation that strives for FAIR principles often entails transforming data submissions to improve understanding and reuse. The Biological and Chemical Oceanography Data Management Office (BCO-DMO, https://www.bco-dmo.org) has been adopting the data containerization specification of the Frictionless Data project (https://frictionlessdata.io) in an effort to improve its data curation process efficiency. In doing so, BCO-DMO has been using the Frictionless Data Package Pipelines library (https://github.com/frictionlessdata/datapackage-pipelines) to define the processing steps that transform original submissions to final data products. Because these pipelines are defined using a declarative language they can be serialized into formal provenance data structures using the Provenance Ontology (PROV-O, https://www.w3.org/TR/prov-o/). While there may still be some curation steps that cannot be easily automated, this method is a step towards reproducible transforms that bridge the original data submission to its published state in machine-actionable ways that benefit the research community through transparency in the data curation process. BCO-DMO has built a user interface on top of these modular tools for making it easier for data managers to process submission, reuse existing workflows, and make transparent the added value of domain-specific data curation.
    Description: NSF #1924618
    Keywords: Data Curation ; Provenance ; Workflows ; Frictionless Data ; Data management ; Data repository
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  • 82
    Publication Date: 2022-05-26
    Description: Cameras were mounted in a newly designed corehead of a piston corer and used to photograph coring operations during 36 stations on CHAIN cruise 75 and 28 stations on ATLANTIS II cruise 42. Through the analysis of these photographs, the deep-water operation of a piston corer during its descent, tripping, impact with the bottom, and ascent has been studied, providing information on the corer's stability, effectiveness in obtaining a bottom sample, and influence on the nearby sea-floor. Accurate determinations of the amount of penetration were possible, allowing comparisons to be made with the more indirect methods of determining penetration and with the length of core recovered. Sediment clouds produced by bottom currents were noticed in many of the bottom photographs. A number of suggestions are made for future piston coring operations. The corer descends with little rotation and swinging. Free-fall and penetration generally take place in less than 5 seconds, with a rotation of 20-60° and an increase of about 6° in vertical deviation. During penetration, the corer disturbs the surrounding sea floor, producing both mounds and depressions around the core barrels. While resting in the bottom, the corer is very stable although some wobbling does occur. Considerable rotation takes place during both pull-out and ascent; frequent sediment discharges from the piston corer occur. No consistent relationship was found between the amount of penetration and the length of core recovered, and thus with the degree of core shortening. Comparisons between piston and pilot cores indicate that the piston cores have been shortened and disturbed relative to the pilot cores, and that as much as a meter of the upper portion of the piston core has been lost. The position of the mud-mark appears to be a reliable indicator of the amount of penetration; estimates by extrapolation of the thermal gradient to the surface are less reliable. The vertical deviation of the corer in the bottom does not influence the amount of penetration. Stratigraphic dips in the recovered cores correspond poorly to this vertical deviation in the bottom.
    Description: The National Science Foundation Grants GA-1077 and GA-1209 and submitted to the Office of Naval Research under Contract Nonr-4029(00); NR 260-101, and N00014-66-C0241; NR 083- 004.
    Keywords: Underwater photography
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  • 83
    facet.materialart.
    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: This report presents the results of gravity measurements obtained aboard the Research Vessel CHAIN of the Woods Hole Oceanographic Institution during cruise 7 3, 6 to 26 September 1967. Information on bathymetry and other studies conducted during CHAIN cruise 73 may be found in W.H.O.I. Reference No. 68-50 (Knott, et al., 1968). Gravity measurements were made simultaneously with the Massachusetts Institute of Technology (MIT) vibrating string gravity meter and with LaCoste and Romberg sea gravity meter number S-13. The data presented is a selective composite of information from both meters . The base reference station used for the measurements is at the W. H. 0. I. dock in Woods Hole, Massachusetts. Its gravity value was taken to be 980327. 0 mgal, however, recent ties of this station to national gravity network stations (Anonymous, 1965) in the Boston, Massachusetts area indicate that this reading is high by about 1. 4 mgal. Thermal and electrical difficulties with the MIT meter made port-to-port drift prediction uncertain (Bowin, Wing and Aldrich, in press). Drift rate for this meter was determined on the basis of its continuous averaged differences with the LaCoste and Romberg meter. This method showed the MIT meter drifting with respect to the LaCoste and Romberg meter by+ 1. 611 mgal per day for the cruise period. Drift of the LaCoste and Romberg gravity meter during CHAIN 73 was - 0.026 mgal/day from in-port measurements at beginning and end of cruise. This last drift value is anomalous in sign and magnitude with respect to the meter's over-all drift rate , and was not applied. The accuracy of the sea measurements is estimated to be about ±10 mgal (Bowin, Wing, and Aldrich, in press). Free -air anomaly values were calculated using the 1930 International Gravity Formula. Water depths are in meters corrected according to the tables of Matthews ( 1939). Bouguer anomaly values were calculated using an infinite slab correction and an assumed crustal density of 2. 67 gm/cm3 . A density of 1. 03 gm/cm3 was assumed for sea water.
    Description: The National Science Foundation Grant GA-9?6 and submitted to the Office of Naval Research under Contract Nonr-4029(00)~ NR 260-101.
    Keywords: Gravity--Measuremnent--Caribbean Sea ; Gravity--Measurement--North Atlantic Ocean ; Gravity anomalies
    Repository Name: Woods Hole Open Access Server
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  • 84
    facet.materialart.
    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: In July 1962 a short cruise was made on CHAIN to investigate the hypothesis (Worthington 1962) that the major circulation of the North Atlantic is divided into two anti-cyclonic eddies or gyres. Evidence from International Geophysical Year data indicated that the thermocline water east of the Grand Banks had different characteristics from Sargasso Sea water. In particular, the dissolved oxygen content throughout the thermocline was at a much higher level in the more northerly waters than in the Sargasso Sea. It was deduced from this that the Gulf Stream, which transports a large volume of water of the Sargasso Sea type, does not turn south around the Tail of the Banks, but that the strong, narrow currents found to the East of the Banks transport water of different origin.
    Description: The Geqphysics Branch, Office of Naval Research Under Contract-Nonr-2196(00) (NR-083-004)
    Keywords: Oceanography--North Atlantic Ocean ; Ocean circulation--North Atlantic Ocean ; Oceanographic instruments
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  • 85
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Sakinan, S., Lawson, G. L., Wiebe, P. H., Chu, D., & Copley, N. J. Accounting for seasonal and composition-related variability in acoustic material properties in estimating copepod and krill target strength. Limnology and Oceanography-Methods, 17, (2019): 607-625, doi: 10.1002/lom3.10336.
    Description: Estimation of abundance or biomass, using acoustic techniques requires knowledge of the frequency dependent acoustic backscatter characteristics, or target strength, of organisms. Target strength of zooplankton is typically estimated from physics‐based models that involve multiple parameters, notably including the acoustic material properties (i.e., the contrasts in density and sound speed between the animal and surrounding seawater). In this work, variability in the acoustic material properties of two zooplankton species in the Gulf of Maine, the copepod (Calanus finmarchicus) and krill (Meganyctiphanes norvegica), was investigated relative to changing season as well as, for the copepod, temperature and depth. Increases in the density and sound speed contrasts of these species from fall to spring were observed. Target strength predictions based on these measurements varied between fall and spring by 2‐3 dB in krill. Measurements were also conducted on C. finmarchicus lipid extract at changing temperature and pressure. The density contrast of the extract varied negatively with temperature, while the sound speed contrast changed by more than 10 % over the temperature and pressure ranges that the organism expected to occupy. C. finmarchicus target strength predictions showed that the combined effect of temperature and pressure can be significant (more than 10 dB) due to the varying response of lipids. The large vertical migration ranges and lipid accumulation characteristics of these species (e.g., the diapause behaviour of Calanus copepods) suggest that it is necessary for seasonal and environmental variability in material properties to be taken into account to achieve reliable measurements.
    Description: We thank Captain Ken Houtler and Mate Ian Hanley on the R/V Tioga for assistance at sea. Al Bradley kindly loaned and provided assistance with the pressure chamber. We would also like to thank Phil Alatalo and Taylor Crockford for their assistance with at‐sea sampling, Dave Kulis and Jennifer Johnson for their assistance in the laboratory, and Andone Lavery for advice and loaning of the data acquisition system. Special thanks to Alex Bergan for general logistics and overall support. Funding was provided by the WHOI Ocean Life Institute. S.S. was supported by TUBITAK 2219 ‐ International Postdoctoral Research Fellowship Program.
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  • 86
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Weber, L., Gonzalez-Diaz, P., Armenteros, M., & Apprill, A. The coral ecosphere: a unique coral reef habitat that fosters coral-microbial interactions. Limnology and Oceanography, 64(6), (2019): 2373-2388, doi: 10.1002/lno.11190.
    Description: Scleractinian corals are bathed in a sea of planktonic and particle‐associated microorganisms. The metabolic products of corals influence the growth and composition of microorganisms, but interactions between corals and seawater microorganisms are underexplored. We conducted a field‐based survey to compare the biomass, diversity, composition, and functional capacity of microorganisms in small‐volume seawater samples collected adjacent to five coral species with seawater collected 〉 1 m away from the reef substrate on the same reefs. Seawater collected close to corals generally harbored copiotrophic‐type bacteria and its bacterial and archaeal composition was influenced by coral species as well as the local reef environment. Trends in picoplankton abundances were variable and either increased or decreased away from coral colonies based on coral species and picoplankton functional group. Genes characteristic of surface‐attached and potentially virulent microbial lifestyles were enriched in near‐coral seawater compared to reef seawater. There was a prominent association between the coral Porites astreoides and the coral symbiont Endozoicomonas, suggesting recruitment and/or shedding of these cells into the surrounding seawater. This evidence extends our understanding of potential species‐specific and reef site‐influenced microbial interactions that occur between corals and microorganisms within this near‐coral seawater environment that we propose to call the “coral ecosphere.” Microbial interactions that occur within the coral ecosphere could influence recruitment of coral‐associated microorganisms and facilitate the transfer of coral metabolites into the microbial food web, thus fostering reef biogeochemical cycling and a linkage between corals and the water column.
    Description: This project was funded by the Dalio Foundation through the Dalio Ocean Initiative, which helped establish a new partnership between U.S. and Cuban scientists. Data analysis and manuscript preparation support was provided by NSF GRFP award to L. W. and NSF OCE‐1736288 to A. A. Special thanks to our colleague Alyson Santoro (University of California, Santa Barbara) for project advice and discussion, Fernando Bretos (The Ocean Foundation) for cruise conceptualization and organization, and Justin Ossolinski, Sean McNally, Thomas Lankiewicz, as well as the fellow scientists on the missions for field assistance. Thanks to the crew of the R/V Felipe Poey as well as the La Reina vessel and the Avalon diving center. We are grateful for Karen Selph of the University of Hawai‘i School of Ocean and Earth Science and Technology for training in flow cytometry methods and Chris Wright and the University of Illinois W. M. Keck Center for Comparative and Functional Genomics for sequencing support. We would also like to thank Greg Fournier, Elizabeth Kujawinski, and Stefan Sievert for comments on this manuscript.
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  • 87
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Hunter-Cevera, K. R., Neubert, M. G., Olson, R. J., Shalapyonok, A., Solow, A. R., & Sosik, H. M. Seasons of Syn. Limnology and Oceanography. (2019), doi: 10.1002/lno.11374.
    Description: Synechococcus is a widespread and important marine primary producer. Time series provide critical information for identifying and understanding the factors that determine abundance patterns. Here, we present the results of analysis of a 16‐yr hourly time series of Synechococcus at the Martha's Vineyard Coastal Observatory, obtained with an automated, in situ flow cytometer. We focus on understanding seasonal abundance patterns by examining relationships between cell division rate, loss rate, cellular properties (e.g., cell volume, phycoerythrin fluorescence), and environmental variables (e.g., temperature, light). We find that the drivers of cell division vary with season; cells are temperature‐limited in winter and spring, but light‐limited in the fall. Losses to the population also vary with season. Our results lead to testable hypotheses about Synechococcus ecophysiology and a working framework for understanding the seasonal controls of Synechococcus cell abundance in a temperate coastal system.
    Description: We would like to thank E. T. Crockford, E. E. Peacock, J. Fredericks, Z. Sandwith, the MVCO Operations Team, divers of the WHOI diving program, and captain Houtler and first mate Hanley of the R/V Tioga for logistical support; S. Laney for assistance with radiometer data processing; and P. Henderson of the Woods Hole Oceanographic Institution (WHOI) Nutrient Analytical Facility for analytical support. This work was supported by U.S. NSF grants OCE‐0119915, OCE‐0530830, OCE‐1031256, OCE‐1655686, DEB‐1145017, and DEB‐1257545; NASA grants NNX11AF07G and NNX13AC98G; Gordon and Betty Moore Foundation grant GGA#934; the Investment in Science Fund, given primarily by WHOI Trustee and Corporation Members; Simons Foundation award 561126; National Defense Science and Engineering graduate fellowship from the U.S. Department of Defense, and the Hibbitt Early Career Fellowship at the Marine Biological Laboratory.
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  • 88
    Publication Date: 2022-05-26
    Description: This directory contains BBTRE/DoMORE processed data (“all_BBTRE.mat” and “all_DoMORE.mat”) that was used to produce all figures in the above research letter. Each mat file has two structure arrays named “location” and “patch10”. The “location” array includes microstructure profile information used in this study (Table D1). The “patch10” array includes 10-m patch-wise parameter estimates used in this study (Table D2). Note that bulk averaged parameters can be constructed from parameters saved in “patch10” (see the above paper).
    Description: This project was funded by the Japan Society for the Promotion of Science.
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  • 89
    Publication Date: 2022-05-26
    Description: The goal of this cruise was to deploy 51 ocean bottom seismometers (OBS) and conduct rock dredges at the Quebrada/Discovery/Gofar (QDG) transform fault systems, with a focus on the Gofar system. QDG is located in the equatorial east Pacific on the East Pacific Rise (Figure 1). Sections of the Gofar and Discovery systems rupture with large (Mw 〉 5.3) earthquakes every 5-6 years, while only one event of this size has occurred on Quebrada in the last 35 years. Variations in along-strike earthquake behavior during these seismic cycles are further constrained by results from a 2008 OBS experiment on QDG. The 2008 experiment revealed the presence of ‘rupture zones’, which fail quasi-periodically in M6 earthquakes, and ‘rupture barriers’, which repeatedly stop large ruptures, yet undergo intense foreshock sequences. The current OBS deployment on Gofar is thus aimed at recording variations in stress build up, stress release, and fault strength within the context of a well-known seismic cycle.
    Description: 2022-03-03
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  • 90
    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Bhatnagar, S., Cowley, E. S., Kopf, S. H., Pérez Castro, S., Kearney, S., Dawson, S. C., Hanselmann, K., & Ruff, S. E. Microbial community dynamics and coexistence in a sulfide-driven phototrophic bloom. Environmental Microbiome, 15(1),(2020): 3, doi:10.1186/s40793-019-0348-0.
    Description: Background: Lagoons are common along coastlines worldwide and are important for biogeochemical element cycling, coastal biodiversity, coastal erosion protection and blue carbon sequestration. These ecosystems are frequently disturbed by weather, tides, and human activities. Here, we investigated a shallow lagoon in New England. The brackish ecosystem releases hydrogen sulfide particularly upon physical disturbance, causing blooms of anoxygenic sulfur-oxidizing phototrophs. To study the habitat, microbial community structure, assembly and function we carried out in situ experiments investigating the bloom dynamics over time. Results: Phototrophic microbial mats and permanently or seasonally stratified water columns commonly contain multiple phototrophic lineages that coexist based on their light, oxygen and nutrient preferences. We describe similar coexistence patterns and ecological niches in estuarine planktonic blooms of phototrophs. The water column showed steep gradients of oxygen, pH, sulfate, sulfide, and salinity. The upper part of the bloom was dominated by aerobic phototrophic Cyanobacteria, the middle and lower parts by anoxygenic purple sulfur bacteria (Chromatiales) and green sulfur bacteria (Chlorobiales), respectively. We show stable coexistence of phototrophic lineages from five bacterial phyla and present metagenome-assembled genomes (MAGs) of two uncultured Chlorobaculum and Prosthecochloris species. In addition to genes involved in sulfur oxidation and photopigment biosynthesis the MAGs contained complete operons encoding for terminal oxidases. The metagenomes also contained numerous contigs affiliating with Microviridae viruses, potentially affecting Chlorobi. Our data suggest a short sulfur cycle within the bloom in which elemental sulfur produced by sulfide-oxidizing phototrophs is most likely reduced back to sulfide by Desulfuromonas sp. Conclusions: The release of sulfide creates a habitat selecting for anoxygenic sulfur-oxidizing phototrophs, which in turn create a niche for sulfur reducers. Strong syntrophism between these guilds apparently drives a short sulfur cycle that may explain the rapid development of the bloom. The fast growth and high biomass yield of Chlorobi-affiliated organisms implies that the studied lineages of green sulfur bacteria can thrive in hypoxic habitats. This oxygen tolerance is corroborated by oxidases found in MAGs of uncultured Chlorobi. The findings improve our understanding of the ecology and ecophysiology of anoxygenic phototrophs and their impact on the coupled biogeochemical cycles of sulfur and carbon.
    Description: This work was carried out at the Microbial Diversity summer course at the Marine Biological Laboratory in Woods Hole, MA. The course was supported by grants from National Aeronautics and Space Administration, the US Department of Energy, the Simons Foundation, the Beckman Foundation, and the Agouron Institute. Additional funding for SER was provided by the Marine Biological Laboratory.
    Keywords: Microbial succession ; Green sulfur bacteria ; Prosthecochloris ; Syntrophy ; Brackish coastal ecosystem ; Anoxygenic phototrophy ; Microviridae ; Sulfur cycling ; CRISPR-Cas ; Resilience
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 91
    Publication Date: 2022-05-26
    Description: Presented at Ocean Sciences Meeting (OSM), San Diego, CA, 16 - 21 February 2020
    Description: BCO-DMO is the Biological and Chemical Oceanography Data Management Office. We help oceanography researchers who are funded by the National Science Foundation’s (NSF's) Division of Ocean Sciences' (OCE) Biological or Chemical Oceanography Sections or the Division of Polar Programs' Antarctic Organisms & Ecosystems Program manage their data, making them accessible over the internet. This lightning talk gives a brief overview of who we are, who we work with, and the types of data we manage.
    Description: Award(s): NSF #1924618
    Keywords: Data Curation ; Data management ; Data repository
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 92
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: The Woods Hole Oceanographic Institution has been using deepsea moored buoys for acquiring serial observations of ocean currents, temperature .and other data for over twelve years. A brief description of the deep-sea mooring program is given. The mooring statistics and performance are described. Mooring failures of 1970 and 1971 have been categorized and statistics on the modes and causes of failures are presented. The reliabilities of different types of moorings are computed and compared. The role of radio telemetry for the real-time measurement of mooring line tension and its use in checking the mooring status are discussed. Examples of potential design data like tension and currents recorded by moorings that failed are provided. Finally, recommendations for research and development needed to improve mooring reliability are given.
    Description: Prepared for the Office of NavaZ Research under Contract N00014-66-C024lj NR 083-004.
    Keywords: Oceanographic buoys ; Deep-sea moorings
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 93
    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Addamo, A. M., Miller, K. J., Haussermann, V., Taviani, M., & Machordom, A. Global-scale genetic structure of a cosmopolitan cold-water coral species. Aquatic Conservation: Marine and Freshwater Ecosystems, (2020): 1-14, doi:10.1002/aqc.3421.
    Description: 1. When considering widely distributed marine organisms with low dispersal capabilities, there is often an implication that the distribution of cosmopolitan species is an artefact of taxonomy, constrained by the absence of characters for delimiting either sibling or cryptic species. Few studies have assessed the relationship among populations across the global range of the species' distribution, and the presence of oceanographic barriers that might influence gene flow among populations are underestimated. 2. In this study, evolutionary and ecological drivers of connectivity patterns have been inferred among populations of the cold‐water coral Desmophyllum dianthus, a common and widespread solitary scleractinian species, whose reproduction strategy and larval dispersal are still poorly unknown. 3. The genetic structure of D. dianthus was explored using 30 microsatellites in 347 specimens from 13 localities distributed in the Mediterranean Sea and Atlantic and Pacific Oceans. 4. Results clearly reveal genetically differentiated populations in the Northern and Southern Hemispheres (FST = 0.16, FSC = 0.01, FCT = 0.15, P‐values highly significant), and Chilean and New Zealand populations with independent genetic profiles. 5. Marine connectivity patterns at different spatial scales are discussed to characterize larval dispersal and gene flow through the Northern and Southern Hemispheres.
    Description: This research was supported by the Spanish Ministry of Science and Innovation (CGL2011‐23306), and EU CoCoNET—“Towards COast to COast NETworks of marine protected areas (from the shore to the high and deep sea), coupled with sea‐based wind energy potential”—from FP7‐KKBE of the European Commission (project ID: 287844). This scientific contribution commits to EESF Cocarde, Italian Flag Ritmare, and Region Apulia Biomap programmes. This is scientific publication no. 1888 Ismar‐CNR Bologna. Funding to VH was partially provided through Fondecyt project nos. 1131039 and 1161699. This is publication no. 179 of Huinay Scientific Field Station.
    Keywords: cold‐water corals ; cosmopolitan species ; gene flow ; larval dispersal ; microsatellite ; molecular ecology ; population structure
    Repository Name: Woods Hole Open Access Server
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  • 94
    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Ralston, D. K., Yellen, B., Woodruff, J. D., & Fernald, S. Turbidity hysteresis in an estuary and tidal river following an extreme discharge event. Geophysical Research Letters, 47(15), (2020): e2020GL088005, doi:10.1029/2020GL088005.
    Description: Nonlinear turbidity‐discharge relationships are explored in the context of sediment sourcing and event‐driven hysteresis using long‐term (≥12‐year) turbidity observations from the tidal freshwater and saline estuary of the Hudson River. At four locations spanning 175 km, turbidity generally increased with discharge but did not follow a constant log‐log dependence, in part due to event‐driven adjustments in sediment availability. Following major sediment inputs from extreme precipitation and discharge events in 2011, turbidity in the tidal river increased by 20–50% for a given discharge. The coherent shifts in the turbidity‐discharge relationship along the tidal river over the subsequent 2 years suggest that the 2011 events increased sediment availability for resuspension. In the saline estuary, changes in the sediment‐discharge relationship were less apparent after the high discharge events, indicating that greater background turbidity due to internal sources make event‐driven inputs less important in the saline estuary at interannual time scales.
    Description: This work was sponsored by the National Estuarine Research Reserve System Science Collaborative, funded by the National Oceanic and Atmospheric Administration and managed by the University of Michigan Water Center (NAI4NOS4190145), with additional support to Yellen and Woodruff from USGS Cooperative Agreement No. G19AC00091.
    Repository Name: Woods Hole Open Access Server
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  • 95
    Publication Date: 2022-05-26
    Description: Author Posting. © The Author(s), 2020. This is the author's version of the work. It is posted here by permission of Oxford University Press for personal use, not for redistribution. The definitive version was published in Toxicological Sciences (2020): kfaa158, doi:10.1093/toxsci/kfaa158.
    Description: Chemical modifications of proteins, DNA, and RNA moieties play critical roles in regulating gene expression. Emerging evidence suggests the RNA modifications (epitranscriptomics) have substantive roles in basic biological processes. One of the most common modifications in mRNA and noncoding RNAs is N6-methyladenosine (m6A). In a subset of mRNAs, m6A sites are preferentially enriched near stop codons, in 3′ UTRs, and within exons, suggesting an important role in the regulation of mRNA processing and function including alternative splicing and gene expression. Very little is known about the effect of environmental chemical exposure on m6A modifications. As many of the commonly occurring environmental contaminants alter gene expression profiles and have detrimental effects on physiological processes, it is important to understand the effects of exposure on this important layer of gene regulation. Hence, the objective of this study was to characterize the acute effects of developmental exposure to PCB126, an environmentally relevant dioxin-like PCB, on m6A methylation patterns. We exposed zebrafish embryos to PCB126 for 6 h starting from 72 h post fertilization and profiled m6A RNA using methylated RNA immunoprecipitation followed by sequencing (MeRIP-seq). Our analysis revealed 117 and 217 m6A peaks in the DMSO and PCB126 samples (false discovery rate 5%), respectively. The majority of the peaks were preferentially located around the 3′ UTR and stop codons. Statistical analysis revealed 15 m6A marked transcripts to be differentially methylated by PCB126 exposure. These include transcripts that are known to be activated by AHR agonists (eg, ahrra, tiparp, nfe2l2b) as well as others that are important for normal development (vgf, cebpd, sned1). These results suggest that environmental chemicals such as dioxin-like PCBs could affect developmental gene expression patterns by altering m6A levels. Further studies are necessary to understand the functional consequences of exposure-associated alterations in m6A levels.
    Description: National Institute of Health National Institute of Environmental Health Sciences Outstanding New Environmental Scientist (NIH R01ES024915 to N.A.); Woods Hole Center for Oceans and Human Health [National Institutes of Health (NIH) (Grant P01ES028938); National Science Foundation (Grant OCE-1840381) to M. E. Hahn, J. J. Stegeman, N.A., and S.K.].
    Description: 2021-10-16
    Keywords: dioxin-like PCBs ; development ; zebrafish ; epitranscriptomics ; m6A ; MeRIP
    Repository Name: Woods Hole Open Access Server
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  • 96
    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Lamb, D. C., Hargrove, T. Y., Zhao, B., Wawrzak, Z., Goldstone, J. V., Nes, W. D., Kelly, S. L., Waterman, M. R., Stegeman, J. J., & Lepesheva, G. I. Concerning P450 evolution: structural analyses support bacterial origin of sterol 14α-demethylases. Molecular Biology and Evolution, (2020): msaa260, doi:10.1093/molbev/msaa260.
    Description: Sterol biosynthesis, primarily associated with eukaryotic kingdoms of life, occurs as an abbreviated pathway in the bacterium Methylococcus capsulatus. Sterol 14α-demethylation is an essential step in this pathway and is catalyzed by cytochrome P450 51 (CYP51). In M. capsulatus, the enzyme consists of the P450 domain naturally fused to a ferredoxin domain at the C-terminus (CYP51fx). The structure of M. capsulatus CYP51fx was solved to 2.7 Å resolution and is the first structure of a bacterial sterol biosynthetic enzyme. The structure contained one P450 molecule per asymmetric unit with no electron density seen for ferredoxin. We connect this with the requirement of P450 substrate binding in order to activate productive ferredoxin binding. Further, the structure of the P450 domain with bound detergent (which replaced the substrate upon crystallization) was solved to 2.4 Å resolution. Comparison of these two structures to the CYP51s from human, fungi, and protozoa reveals strict conservation of the overall protein architecture. However, the structure of an “orphan” P450 from nonsterol-producing Mycobacterium tuberculosis that also has CYP51 activity reveals marked differences, suggesting that loss of function in vivo might have led to alterations in the structural constraints. Our results are consistent with the idea that eukaryotic and bacterial CYP51s evolved from a common cenancestor and that early eukaryotes may have recruited CYP51 from a bacterial source. The idea is supported by bioinformatic analysis, revealing the presence of CYP51 genes in 〉1,000 bacteria from nine different phyla, 〉50 of them being natural CYP51fx fusion proteins.
    Description: The study was supported by National Institutes of Health (Grant No. R01 GM067871 to G.I.L.) and by a UK-USA Fulbright Scholarship and the Royal Society (to D.C.L.).
    Keywords: sterol biosynthesis ; evolution ; cytochrome P450 ; CYP51 redox partner ; crystallography
    Repository Name: Woods Hole Open Access Server
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  • 97
    Publication Date: 2022-05-26
    Description: This is the second part in three of an observational study of tropical oceanic clouds and their relation to the large-scale flow patterns. The first part appeared in preliminary form in 1959 in a volume entitled "Cloud Structure am.d Distributions over the Tropical Pacific. Part I", an unpublished Technical Report (Reference No.58-62) of the Woods Hole Oceanographic Institution. The four authors were the same as those of this report. In addition, a very brief summary of the work (by J. Malkus and C. Ronne) was published in Monograph No.5 of the American Geophysical Union in 1960. A review of the cloud code evolved during this program has been published by M. Alaka in the Bulletin of World Meteorological Organization for April, 1960. The basic material for this study consists of three photographic flights made during July and August 1957 on Military Air Transport (MATS) cargo aircraft flying on regular schedules between San Francisco and the Phillipines. The photographer was Claude Ronne of Woods Hole, accompanied by Joanne Malkus om. the third flight. The appropriate synoptic data were kindly collected by Prof. Colin Ramage of the University of Hawaii and were analyzed by Professor Riehl (then at the University of Chicago) and his colleague Mr. W.S.Gray. The first report described the purposes and methods of the inquiry and presented the results of the first trans-Pacific flight. This report is concerned primarily with the results of the Second flight. A third report on the last flight is planned later, as well as eventual publication of all three parts together. The part of the program reported here has been supported jointly by the Office of Naval Research and the National Science Foundation.
    Description: Office of Naval Research under Contract No. 1721(00) and to the National Science Foundation under Grantt No.7368 with the Woods Hole Oceanographic Institution.
    Keywords: Clouds ; Marine meteorology--Tropics ; Pacific Ocean
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 98
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    Unknown
    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: This manual describes the objectives, design, operation, and maintenance of the Precision Graphic Recorder (PGR), emphasizing its application to echo-sounding. The words "precision graphic recording" describe a method for displaying data by means of successive, precisely-timed rectilinear sweeps of a recording point or "stylus" across a long, moving strip of sensitized paper (Veatch and Smith, 1939, p. 61-63). The recorded data appear as dye-markings, shaded in proportion to signal amplitude along the sweep of the moving recording point.
    Description: The Bureau of Ships Under Contract NObsr-72521 and Office of Naval Research Under Contract Nonr-1367 (00) (NR-261-102)
    Keywords: Sonar ; Echo sounding ; Oceanographic instruments
    Repository Name: Woods Hole Open Access Server
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  • 99
    Publication Date: 2022-05-26
    Description: Research during this six month period was performed during cruises of the CHAIN to the Romanche Trench, to the Puerto Rico Trench, and to the Mediterranean Sea, and during a cruise of the BEAR to the Gulf of Maine. New instrumentation aboard the CHAIN included the 12, 000 joule Boomer and a 25, 000 joule Sparker for continuous Seismic reflection profiles and other research in hydroacoustics. A semiautomatic data recording system for shipboard use was in.stalled and operated by IBM and, to facilitate launching and retrieving deep gear, a closed circuit television system was used . Also the navigational system, GEON, was installed and tested. Prior to the cruises of the summer and fall redesign and refinement of the instrumentation and equipment entailed overhaul of the thermistor chain and contouring temperature recorder, modification of the heat probe for thermal gradient measurements to lessen lowering time, and improvement of the inverted echo-sounding equipment. Research at sea included collecting samples of rock and sediment and photographing the ocean floor in support of research into the structure and dynamics of the Romanche and Puerto Rico Trenches and the Mid-Atlantic Ridge , observing internal waves in the North Atlantic studying water circulation in the Mediterranean, the dynamics of flow through the Strait of Gibraltar (concentrating this year on internal waves there), observing the behavior and measuring the sound scattering properties of deep scattering layers in the Mediterranean, measuring heat flow from the inner Earth across the Mid-Atlantic Ridge and in the western Mediterranean, and studying the relationship between sound transmission and the physical properties of the water and sea floor in the eastern Mediterranean. At Woods Hole various analysis programs progressed. Several of these used programs of digital computing which have been prepared lately at Woods Hole. The precision time source for remote control reported earlier was improved and tested ashore. A tape recording system for Scuba divers was devised and tested satisfactorily in thirty feet of water.
    Description: Undersea Warfare Branch Office of Naval Research Contracts Nonr-1367(00)NR 261-102 and Nonr-2129(00)NR 261-104
    Keywords: Underwater acoustics
    Repository Name: Woods Hole Open Access Server
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  • 100
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    Woods Hole Oceanographic Institution | Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: Measurements of the acoustic pressure of spark discharges were made at a shallow depth (10 feet) for various voltages, stored energies, inductances and capacitances of the system, and electrode areas. The voltages ranged from 1500 V to 11 KV, and the energy storing capacitances from 8 to 800 ufd. In this range the peak pressure observed was proportional to peak current and the decay constant of the pressure-time curve was essentially the same as the electrical discharge decay constant.
    Description: Office of Naval Research under Contract Nonr 1 367(00) NR 261-103
    Keywords: Sound pressure ; Underwater acoustics
    Repository Name: Woods Hole Open Access Server
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