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  • Acoustic doppler current profiler (ADCP), Nortek, Eco; Brazil; Carbon dioxide; Carbon dioxide, partial pressure; Carbon dioxide saturation; chlorophyll; Chlorophyll total; CO2; Costeira; current; Current velocity, horizontal; DATE/TIME; DEPTH, water; dissolved oxygen; ELEVATION; Event label; Florianópolis, Brazil; LATITUDE; LONGITUDE; Mamanguá; mangrove; MULT; Multiparameter probe, YSI Xylem Inc., EXO2; Multiple investigations; Oxygen; Oxygen logger, PME, miniDOT; Oxygen saturation; Paraty, Brazil; pH; pH logger, Onset, HOBO; radon; Radon-222; Radon detector, DURRIDGE, RAD7; Salinity; subtropical area; Temperate; Temperature, water; tidal cycle; Tides; Trace gas analyzer, LI-COR, LI-7810; Tropical; Water level datalogger, Solinst, Levelogger 5  (1)
  • Alkalinity, total; Alkalinity, total, flux; Ammonium; Aragonite saturation state; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, air-sea, flux; Charophyta; Coast and continental shelf; Entire community; Field observation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Heron_Island; Irradiance; Net calcification rate of calcium carbonate; Net production; Nitrate and Nitrite; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Phosphate; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Rocky-shore community; Salinity; South Pacific; Spectrophotometric; Temperate; Temperature, water; Time of day  (1)
  • Siliceous algae  (1)
Collection
Keywords
Publisher
Years
  • 1
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    Hysteresis between coral reef calcification and the seawater aragonite saturation state (2013)
    PANGAEA
    In:  Supplement to: McMahon, Ashly; Santos, Isaac R; Cyronak, Tyler; Eyre, Bradley D (2013): Hysteresis between coral reef calcification and the seawater aragonite saturation state. Geophysical Research Letters, 40(17), 4675-4679, https://doi.org/10.1002/grl.50802
    Details
    Publication Date: 2024-03-15
    Description: Some predictions of how ocean acidification (OA) will affect coral reefs assume a linear functional relationship between the ambient seawater aragonite saturation state (Omega a) and net ecosystem calcification (NEC). We quantified NEC in a healthy coral reef lagoon in the Great Barrier Reef during different times of the day. Our observations revealed a diel hysteresis pattern in the NEC versus Omega a relationship, with peak NEC rates occurring before the Omega a peak and relatively steady nighttime NEC in spite of variable Omega a. Net ecosystem production had stronger correlations with NEC than light, temperature, nutrients, pH, and Omega a. The observed hysteresis may represent an overlooked challenge for predicting the effects of OA on coral reefs. If widespread, the hysteresis could prevent the use of a linear extrapolation to determine critical Omega a threshold levels required to shift coral reefs from a net calcifying to a net dissolving state.
    Keywords: Alkalinity, total; Alkalinity, total, flux; Ammonium; Aragonite saturation state; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, air-sea, flux; Charophyta; Coast and continental shelf; Entire community; Field observation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Heron_Island; Irradiance; Net calcification rate of calcium carbonate; Net production; Nitrate and Nitrite; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Phosphate; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Rocky-shore community; Salinity; South Pacific; Spectrophotometric; Temperate; Temperature, water; Time of day
    Type: Dataset
    Format: text/tab-separated-values, 1204 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Salinity, depth, current, temperature, dissolved oxygen, carbon dioxide, radon (222Rn), pH and chlorophyll hourly variation in two mangrove tidal creeks in Brazil: Paraty and Florianópolis (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Salinity, depth, current, temperature, oxygen, carbon dioxide (CO2), radon (222Rn), pH and chlorophyll hourly variation during a complete neap to spring tidal cycle in 2 mangrove creeks in Brazil: Paraty (23°18'06.2S 44°38'53.6W) and Florianópolis (27°38'55.6S 48°33'11.2W). Sea level and current velocities were measured every 2 minutes using a ADCP (Nortek ECO) deployed in the mouth of each tidal creek. Salinity and temperature (Solinst Levelogger 5), dissolved oxygen (PME miniDOT) and pH (Onset HOBO pH logger) probes were attached to the vessel at 0.5 m depth and set to record every minute. Chlorophyll was also recorded every minute using a YSI EXO2. A submergible water pump was installed from the vessel at 0.5 m depth to continuously transport (3 L min-1) surface mangrove creek water into a RAD AQUA DURRIDGE showerhead gas equilibrator. The headspace air was pumped to a Drierite® desiccant and then to an automated radon (222Rn) detector (RAD7, DURRIDGE) coupled with a CO2 trace gas analyzer (LI-COR 7810). The gas equilibrator and detectors were connected in series in a closed air loop . The 222Rn activities (measured each 30 min) and pCO2 (1 min frequency) in air were converted to dissolved in seawater using their partitioning and solubility coefficients. The time series data were integrated using moving averages every hour to allow comparison across the different variables and time scales.
    Keywords: Acoustic doppler current profiler (ADCP), Nortek, Eco; Brazil; Carbon dioxide; Carbon dioxide, partial pressure; Carbon dioxide saturation; chlorophyll; Chlorophyll total; CO2; Costeira; current; Current velocity, horizontal; DATE/TIME; DEPTH, water; dissolved oxygen; ELEVATION; Event label; Florianópolis, Brazil; LATITUDE; LONGITUDE; Mamanguá; mangrove; MULT; Multiparameter probe, YSI Xylem Inc., EXO2; Multiple investigations; Oxygen; Oxygen logger, PME, miniDOT; Oxygen saturation; Paraty, Brazil; pH; pH logger, Onset, HOBO; radon; Radon-222; Radon detector, DURRIDGE, RAD7; Salinity; subtropical area; Temperate; Temperature, water; tidal cycle; Tides; Trace gas analyzer, LI-COR, LI-7810; Tropical; Water level datalogger, Solinst, Levelogger 5
    Type: Dataset
    Format: text/tab-separated-values, 3716 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
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    Closing the global marine Ra-226 budget reveals the biological pump as a dominant removal flux in the upper ocean (2022)
    American Geophysical Union
    Details
    Publication Date: 2022-12-10
    Description: Author Posting. © American Geophysical Union, 2022. 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 49(12), (2022): e2022GL098087, https://doi.org/10.1029/2022GL098087.
    Description: Radium isotopes are powerful proxies in oceanography and hydrology. Radium mass balance models, including assessments of submarine groundwater discharge (SGD), often overlook particle scavenging (PS) as a pathway for dissolved radium removal from the world ocean. Here, we build a global ocean 226Ra mass balance model and reevaluate the potential importance of PS. We find that PS is the major 226Ra sink for the upper ocean, removing about 96% of the total input from various sources. Aside from vertical exchange with the lower ocean, SGD is the largest 226Ra source into the upper ocean. The biological pump transfers particles to the deep ocean, resulting in a major but often overlooked impact on the global 226Ra marine budget. Our findings suggest that radium mass balance models should consider PS in systems with high siliceous algae production and export fluxes and long water residence times to prevent underestimation of large-scale SGD fluxes.
    Description: The authors are grateful to the many researchers and funding agencies responsible for the collection of data and quality control. The authors are very grateful to Jesus Gomez-Velez of Vanderbilt University for suggesting the statistical approach for distribution expansion and helping with the coding. The authors from Ocean University of China were funded by the Natural Science Foundation of China 41876075, 42130410, and 91958214, and Fundamental Research Funds for the Central Universities China 201962003 and 202072001. Funding for M.A.C. was provided by U.S. National Science Foundation OCE-1736277 and a WHOI-OUC Cooperative Research Initiative award. Valentí Rodellas acknowledges financial support from the Beatriu de Pinós postdoctoral programme of the Catalan Government (2019-BP-00241).
    Description: 2022-12-10
    Keywords: Particle scavenging ; Submarine groundwater discharge ; Siliceous algae ; Global ocean
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Location Call Number Expected Availability
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    PAPER (OA)
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