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  • PANGAEA  (6,242)
  • American Geophysical Union
  • Annual Reviews
  • Blackwell Publishing Ltd
  • 2020-2024  (6,252)
  • 2005-2009
  • 1990-1994
  • 1965-1969
  • 2022  (6,252)
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  • 2020-2024  (6,252)
  • 2005-2009
  • 1990-1994
  • 1965-1969
  • 2020-2023  (94)
Year
  • 1
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    Literature synthesis data of surface energy fluxes and environmental drivers from Arctic vegetation and glacier sites (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Despite the importance of surface energy budgets (SEBs) for land-climate interactions in the Arctic, uncertainties in their prediction persist. In situ observational data of SEB components - useful for research and model validation - are collected at relatively few sites across the terrestrial Arctic, and not all available datasets are readily interoperable. Furthermore, the terrestrial Arctic consists of a diversity of vegetation types, which are generally not well represented in land surface schemes of current Earth system models. This dataset describes the data generated in a literature synthesis, covering 358 study sites on vegetation or glacier (〉=60°N latitude), which contained surface energy budget observations. The literature synthesis comprised 148 publications searched on the ISI Web of Science Core Collection.
    Language: English
    Type: info:eu-repo/semantics/workingPaper
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  • 2
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    Effects of a brackish water inflow on peat pore water variables and methane-cycling microbial community abundances in a freshwater rewetted coastal fen. (2022)
    PANGAEA
    Details
    Publication Date: 2023-02-09
    Description: The rewetting of peatlands is a promising measure to mitigate greenhouse gas (GHG) emissions by preventing the further mineralization of the peat soil through aeration. In coastal peatland, the rewetting with brackish water can increase the GHG mitigation potential by the introduction of sulfate, a terminal electron acceptor (TEA). Sulfate is known to lower the CH4 production and thus, its emission by favoring the growth of sulfate-reducers, which outcompete methanogens for substrate. The data contain porewater variables such as pH, electrical conductivity (EC) and sulfate, chloride, dissolved CO2 and CH4 concentrations, as well as absolute abundances of methane- and sulfate-cycling microbial communities. The data were collected in spring and autumn 2019 after a storm surge with brackish water inflow in January 2019. Field sampling was conducted in the nature reserve Heiligensee and Hütelmoor in North-East Germany, close to the Southern Baltic Sea coast. We took peat cores using a Russian peat corer in addition to pore water diffusion samplers and plastic liners (length: 60cm; inner diameter 10 cm) at four locations along a transect from further inland towards the Baltic Sea. We wanted to compare the soil and pore water geochemistry as well as the microbial communities after the brackish water inflow to the common freshwater rewetting state. Pore water was extracted using pore water suction samplers in the lab and environmental variables were quantified with an ICP. Microbial samples were sampled from the peat core using sterile equipment. We used quantitative polymerase chain reaction (qPCR) to characterize pools of DNA and cDNA targeting total and putatively active bacteria and archaea. qPCR was performed on key functional genes of methane production (mcrA), aerobic methane oxidation (pmoA) and sulfate reduction (dsrB) in addition to the 16S rRNA gene for the absolute abundance of total prokaryotes. Furthermore, we retrieved soil plugs to determine the concentrations and isotopic signatures of dissolved trace gases (CO2/DIC and CH4) in the pore water.
    Language: English
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  • 3
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    Varve thickness of lateglacial ICDP core 5017-1-A-44 (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: This dataset provides annually resolved microfacies data from ICDP core 5017-1-A, retrieved from the deep northern Dead Sea basin in 2010/11, for the last glacial-interglacial transition (ca. 14-13 ka BP). Sediments of the Lisan Formation were investigated between ~94.7 and 91.8 m sediment depth below lake floor (lithozone C2) by continuous thin section microscopy. Thin sections were prepared following the standard procedure by Brauer and Casanova (2001) that was adjusted for salty sediments. Thin section analyses were performed on overlapping large-scale thin sections using a Zeiss Axiolab pol microscope at magnifications of 50-400x. Microfacies analyses included varve counting and measurements of varve and sublayer thickness. The amount of varves in erosional gaps was interpolated and the position of mass flow deposits (MFD) is marked.
    Language: English
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  • 4
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    Physical properties of sea ice cores from L sites measured on leg 1 of the MOSAiC expedition (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: We present sea ice temperature and salinity data from first-year ice (FYI) and second-year ice (SYI) relevant to the temporal development of sea ice permeability and brine drainage efficiency from the early growth phase in October 2019 to the onset of spring warming in May 2020. Our dataset was collected in the central Arctic Ocean during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Expedition in 2019 to 2020. MOSAiC was an international transpolar drift expedition in which the German icebreaker RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. In October 2019, RV Polarstern moored to an ice floe in the Siberian sector of the Arctic at 85 degrees north and 137 degrees east to begin the drift towards the North Pole and the Fram Strait via the Transpolar Drift Stream. The data presented here were collected during the first three legs of the expedition, so all the coring activities took place on the same floe. The end dates of legs 1, 2, and 3 were 13 December, 24 February, and 4 June, respectively. The dataset contributed to a baseline study entitled, Deciphering the properties of different Arctic ice types during the growth phase of the MOSAiC floes: Implications for future studies. The study highlights downward directed gas pathways in FYI and SYI by inferring sea ice permeability and potential brine release from several time series of temperature and salinity measurements. The physical properties presented in this paper lay the foundation for subsequent analyses on actual gas contents measured in the ice cores, as well as air-ice and ice-ocean gas fluxes. Sea ice cores were collected with a Kovacs Mark II 9 cm diameter corer. To measure ice temperatures, about 4.5 cm deep holes were drilled into the core (intervals varied by site and leg) . The temperatures were measured by a digital thermometer within minutes after the cores were retrieved. The ice cores were placed into pre-labelled plastic sleeves sealed at the bottom end. The ice cores were transported to RV Polarstern and stored in a -20 degrees Celsius freezer. Each of the cores was sub-sampled, melted at room temperature, and processed for salinity within one or two days. The practical salinity was estimated by measuring the electrical conductivity and temperature of the melted samples using a WTW Cond 3151 salinometer equipped with a Tetra-Con 325 four-electrode conductivity cell. The practical salinity represents the the salinity estimated from the electrical conductivity of the solution. The dataset also contains derived variables, including sea ice density, brine volume fraction, and the Rayleigh number.
    Language: English
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  • 5
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    n-Fatty acid composition per sediment mass in a rapidly eroding permafrost cliff (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Organic carbon (OC) stored in Arctic permafrost represents one of Earth’s largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing processes. Accelerating erosion of terrestrial permafrost along shorelines leads to increased transfer of organic matter (OM) to nearshore waters. However, the amount of terrestrial permafrost carbon and nitrogen as well as the OM quality in these deposits are still poorly quantified. Here, we characterise the sources and the quality of OM supplied to the Lena River at a rapidly eroding permafrost river shoreline cliff in the eastern part of the delta (Sobo-Sise Island). Our multi-proxy approach captures bulk elemental, molecular geochemical and carbon isotopic analyses of late Pleistocene Yedoma permafrost and Holocene cover deposits, discontinuously spanning the last ~52 ka. We show that the ancient permafrost exposed in the Sobo-Sise cliff has a high organic carbon content (mean of about 5 wt%).We found that the OM quality, which we define as the intrinsic potential to further transformation, decomposition, and mineralization, is also high as inferred by the lipid biomarker inventory. The oldest sediments stem from Marine Isotope Stage (MIS) 3 interstadial deposits (dated to 52 to 28 cal kyr BP) and is overlaid by Last Glacial MIS 2 (dated to 28 to 15 cal ka BP) and Holocene MIS 1 (dated to 7–0 cal ka BP) deposits. The relatively high average chain length (ACL) index of n-alkanes along the cliff profile indicates a predominant contribution of vascular plants to the OM composition. The elevated ratio of iso and anteiso-branched FAs relative to long chain (C ≥ 20) n-FAs in the interstadial MIS 3 and the interglacial MIS 1 deposits, suggests stronger microbial activity and consequently higher input of bacterial biomass during these climatically warmer periods. The overall high carbon preference index (CPI) and higher plant fatty acid (HPFA) values as well as high C / N ratios point to a good quality of the preserved OM and thus to a high potential of the OM for decomposition upon thaw. A decrease of HPFA values downwards along the profile probably indicates a relatively stronger OM decomposition in the oldest (MIS 3) deposits of the cliff.
    Language: English
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  • 6
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    Physical properties of sea ice cores from site MCS_FYI measured on legs 1 to 3 of the MOSAiC expedition (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: We present sea ice temperature and salinity data from first-year ice (FYI) and second-year ice (SYI) relevant to the temporal development of sea ice permeability and brine drainage efficiency from the early growth phase in October 2019 to the onset of spring warming in May 2020. Our dataset was collected in the central Arctic Ocean during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Expedition in 2019 to 2020. MOSAiC was an international transpolar drift expedition in which the German icebreaker RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. In October 2019, RV Polarstern moored to an ice floe in the Siberian sector of the Arctic at 85 degrees north and 137 degrees east to begin the drift towards the North Pole and the Fram Strait via the Transpolar Drift Stream. The data presented here were collected during the first three legs of the expedition, so all the coring activities took place on the same floe. The end dates of legs 1, 2, and 3 were 13 December, 24 February, and 4 June, respectively. The dataset contributed to a baseline study entitled, Deciphering the properties of different Arctic ice types during the growth phase of the MOSAiC floes: Implications for future studies. The study highlights downward directed gas pathways in FYI and SYI by inferring sea ice permeability and potential brine release from several time series of temperature and salinity measurements. The physical properties presented in this paper lay the foundation for subsequent analyses on actual gas contents measured in the ice cores, as well as air-ice and ice-ocean gas fluxes. Sea ice cores were collected with a Kovacs Mark II 9 cm diameter corer. To measure ice temperatures, about 4.5 cm deep holes were drilled into the core (intervals varied by site and leg) . The temperatures were measured by a digital thermometer within minutes after the cores were retrieved. The ice cores were placed into pre-labelled plastic sleeves sealed at the bottom end. The ice cores were transported to RV Polarstern and stored in a -20 degrees Celsius freezer. Each of the cores was sub-sampled, melted at room temperature, and processed for salinity within one or two days. The practical salinity was estimated by measuring the electrical conductivity and temperature of the melted samples using a WTW Cond 3151 salinometer equipped with a Tetra-Con 325 four-electrode conductivity cell. The practical salinity represents the the salinity estimated from the electrical conductivity of the solution. The dataset also contains derived variables, including sea ice density, brine volume fraction, and the Rayleigh number.
    Language: English
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  • 7
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    Alkane, fatty acid, total (organic) carbon and nitrogen distribution in ancient permafrost deposits at the Batagay Megaslump, East Siberia (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: These datasets describe sediment samples taken from the Batagay megaslump, located in Yana Uplands in northeastern Siberia. Most sediment samples were taken from the slump headwall (B19-P1) by rapelling down on a rope from the slump surface and taking samples with a hole saw (diameter 55 mm, 40 mm deep) mounted on a handheld power drill. A second profile (B19-02) of the lowest part of the slump headwall was sampled (~100 m south) using a hammer and axe from the slump floor. Two permafrost sediment blocks (B19-03 and B19-04) at the slump bottom that had fallen from the headwall were sampled using a chainsaw. Finally, a baidzherakh (thermokarst mound; B19-05) in the north of the slump was sampled using a hammer and axe. The samples cover 5 stratigraphical units: 1. lower ice complex, 2. lower sand unit, 3. woody layer, 4. upper ice complex, 5. Holocene cover.
    Language: English
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  • 8
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    n-Fatty acid composition per total organic carbon in a rapidly eroding permafrost cliff (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Organic carbon (OC) stored in Arctic permafrost represents one of Earth’s largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing processes. Accelerating erosion of terrestrial permafrost along shorelines leads to increased transfer of organic matter (OM) to nearshore waters. However, the amount of terrestrial permafrost carbon and nitrogen as well as the OM quality in these deposits are still poorly quantified. Here, we characterise the sources and the quality of OM supplied to the Lena River at a rapidly eroding permafrost river shoreline cliff in the eastern part of the delta (Sobo-Sise Island). Our multi-proxy approach captures bulk elemental, molecular geochemical and carbon isotopic analyses of late Pleistocene Yedoma permafrost and Holocene cover deposits, discontinuously spanning the last ~52 ka. We show that the ancient permafrost exposed in the Sobo-Sise cliff has a high organic carbon content (mean of about 5 wt%).We found that the OM quality, which we define as the intrinsic potential to further transformation, decomposition, and mineralization, is also high as inferred by the lipid biomarker inventory. The oldest sediments stem from Marine Isotope Stage (MIS) 3 interstadial deposits (dated to 52 to 28 cal kyr BP) and is overlaid by Last Glacial MIS 2 (dated to 28 to 15 cal ka BP) and Holocene MIS 1 (dated to 7–0 cal ka BP) deposits. The relatively high average chain length (ACL) index of n-alkanes along the cliff profile indicates a predominant contribution of vascular plants to the OM composition. The elevated ratio of iso and anteiso-branched FAs relative to long chain (C ≥ 20) n-FAs in the interstadial MIS 3 and the interglacial MIS 1 deposits, suggests stronger microbial activity and consequently higher input of bacterial biomass during these climatically warmer periods. The overall high carbon preference index (CPI) and higher plant fatty acid (HPFA) values as well as high C / N ratios point to a good quality of the preserved OM and thus to a high potential of the OM for decomposition upon thaw. A decrease of HPFA values downwards along the profile probably indicates a relatively stronger OM decomposition in the oldest (MIS 3) deposits of the cliff.
    Language: English
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  • 9
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    Alkane distribution in ancient permafrost deposits at the Batagay Megaslump, East Siberia (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Language: English
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  • 10
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    Physical properties of sea ice cores from site MCS-SYI measured on legs 1 to 3 of the MOSAiC expedition (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: We present sea ice temperature and salinity data from first-year ice (FYI) and second-year ice (SYI) relevant to the temporal development of sea ice permeability and brine drainage efficiency from the early growth phase in October 2019 to the onset of spring warming in May 2020. Our dataset was collected in the central Arctic Ocean during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Expedition in 2019 to 2020. MOSAiC was an international transpolar drift expedition in which the German icebreaker RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. In October 2019, RV Polarstern moored to an ice floe in the Siberian sector of the Arctic at 85 degrees north and 137 degrees east to begin the drift towards the North Pole and the Fram Strait via the Transpolar Drift Stream. The data presented here were collected during the first three legs of the expedition, so all the coring activities took place on the same floe. The end dates of legs 1, 2, and 3 were 13 December, 24 February, and 4 June, respectively. The dataset contributed to a baseline study entitled, Deciphering the properties of different Arctic ice types during the growth phase of the MOSAiC floes: Implications for future studies. The study highlights downward directed gas pathways in FYI and SYI by inferring sea ice permeability and potential brine release from several time series of temperature and salinity measurements. The physical properties presented in this paper lay the foundation for subsequent analyses on actual gas contents measured in the ice cores, as well as air-ice and ice-ocean gas fluxes. Sea ice cores were collected with a Kovacs Mark II 9 cm diameter corer. To measure ice temperatures, about 4.5 cm deep holes were drilled into the core (intervals varied by site and leg) . The temperatures were measured by a digital thermometer within minutes after the cores were retrieved. The ice cores were placed into pre-labelled plastic sleeves sealed at the bottom end. The ice cores were transported to RV Polarstern and stored in a -20 degrees Celsius freezer. Each of the cores was sub-sampled, melted at room temperature, and processed for salinity within one or two days. The practical salinity was estimated by measuring the electrical conductivity and temperature of the melted samples using a WTW Cond 3151 salinometer equipped with a Tetra-Con 325 four-electrode conductivity cell. The practical salinity represents the the salinity estimated from the electrical conductivity of the solution. The dataset also contains derived variables, including sea ice density, brine volume fraction, and the Rayleigh number.
    Language: English
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  • 11
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    Rock and paleomagnetic data from two sediment cores from the Black Sea for the past 30 ka (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Rock magnetic and paleomagnetic results covering the past 30 ka were constructed from two sediment cores MSM33_856-1 (MSM33-55-1) and MSM33_855-1 (54-3) from the Black Sea. After the Mediterranean Sea water ingression, finely laminated organic-rich sapropelic sediments and coccolith oozes were deposited in the Black Sea since about 8.3 ka. Relict magnetic minerals in the Black Sea sarpoples are ferrous hemoilmenite, Fe-Mn and Fe-Cr spinels, and magnetite inclusions. In sediments deposited between about 14 and 8 ka, greigite and pyrite were formed in sediments because of the seawater penetration from overlying sediments after the seawater ingression. Before ~14 ka, the Black Sea sediments are dominated by detrital (titano-)magnetite minerals and the sporadically formed greigite which has SIRM/kLF ratios 〉 10 kAm-2. By comparison with detrital (titano-)magnetite samples between 20-30 ka, we found that relict magnetic mineral samples between 0-8.3 ka have similar behavior in recording the geomagnetic field. Moreover, the geomagnetic field variations reconstructed from the Black Sea sapropels are comparable with other validated regional datasets for the past 8.3 ka. The natural remanent magnetization (NRM) and the anhysteretic remanent magnetization (ARM) were measured with a 2G Enterprises 755 SRM (cryogenic) long-core magnetometer equipped with a sample holder for eight discrete samples at a separation of 20 cm. The magnetometer's in-line tri-axial alternating field (AF) demagnetizer was used to demagnetize the NRM and ARM of the samples. The NRM was measured after application of AF peak amplitudes of 0, 5, 10, 15, 20, 30, 40, 50, 65, 80, and 100 mT. Directions of the characteristic remanent magnetization (ChRM) were determined by principle component analysis (PCA) according to Kirschvink (1980). The error range of the ChRM is given as the maximum angular deviation (MAD). The ARM was imparted along the samples' z-axis with a static field of 0.05 mT and an AF field of 100 mT. Demagnetization then was performed in steps of 0, 10, 20, 30, 40, 50, 65, and 80 mT. The median destructive field of the ARM (MDFARM) was determined to estimate the coercivity of the sediments. The slope of NRM versus ARM of common demagnetization steps was used to determine the relative paleointensity (RPI). In most cases, demagnetization steps from 20 to 65 mT were used to determine the RPI.
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  • 12
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    TICON-td: Third-degree tidal constants based on GESLA sea-level records from globally distributed tide gauges (data) (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: This dataset provides data for four third-degree tidal constituents used in the publication of Sulzbach et al (2022). The tidal constituents provided are the 3M1, 3M3, 3N2 and 3L2 for 134 globally distributed stations. The tide information, such as the nodal modulations of these tides, are taken from Table 1 and Table S2 of Ray (2020). These tidal constants are estimated using the GESLA dataset (Woodworth et al 2014) following the approach presented in Piccioni et al (2019). This record is an add-on to the full TICON dataset (https://doi.org/10.1594/PANGAEA.896587), using exactly the same data format and pre-processing. These steps include using tide gauge data that contains at least ten years of continuous data. Further, the dataset is restricted to only contain open ocean tide gauges by limiting it to a mean surrounding depth of tide gauges to be deeper than 500 meters in a 2-degree radius and excluding stations not native to the ocean domain of the employed tidal model TiME. Duplicate and closely neighbouring tide gauges, found within a 0.2-degree radius, are also removed from the dataset. This resulted in the availability of the four tidal constants for 134 tide gauges. The results are stored in one tab-separated text/ASCII file with 13 columns: 1. Latitude of the tide gauge station 2. Longitude of the tide gauge station 3. Constituent name 4. Amplitude (in cm) 5. Phase (in degrees) 6. Standard deviation of the amplitude (in cm) 7. Standard deviation of the phase (in degrees) 8. Percentage of missing observations 9. Total number of observations analyzed 10. Length of the maximum temporal gap found in the time series in days 11. Date of the first observation 12. Date of the last observation 13. Code that corresponds to the original source of the record TICON is a useful and easy-to-handle data set for tide model validation and allows the users to select the records according to the different criteria most suitable for their purposes. The options span from the choice of a geographical region to the use of single constituents or time periods.
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  • 13
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    Total (organic) carbon and nitrogen content in ancient permafrost deposits at the Batagay Megaslump, East Siberia (2022)
    PANGAEA
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    Publication Date: 2023-01-30
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  • 14
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    Rock and paleomagnetic results of sediment core MSM33\_856-1 over the past 30 ka (2022)
    PANGAEA
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    Publication Date: 2023-01-30
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  • 15
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    Microfacies data and age model from the International Continental Scientific Drilling Program (ICDP) Dead Sea core and the Masada outcrop (southwestern shore of the Dead Sea) (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: These datasets provide sedimentological data partly at annual resolution and an age model for the lateglacial part of (1) the ICDP sediment core 5017-1-A retrieved from the deep northern Dead Sea basin in 2010/11, and (2) for the Masada outcrop located at the southwestern shore of the Dead Sea sampled in 2018. The here investigated two sediment sections cover the last glacial-interglacial transition (ca. 17-11.5 ka BP) in the hydroclimatically sensitive Levant, when the water level of Lake Lisan – the precursor of the Dead Sea – dropped dramatically from its glacial high-stand to the Holocene low levels. Here, we analyze the interval between the last two gypsum units – the Upper Gypsum Unit (UGU) and the Additional Gypsum Unit (AGU) – which were also used to correlate the two sites. In the ICDP core this section is located between ~101 and 88.5 m sediment depth below lake floor and at Masada it encompasses the uppermost ~3.8 m sediments of the Lisan Formation, which form the terminal deposit at this site. Due to the lake level decline, the complete transition into the Holocene is only recorded in the ICDP core, while sedimentation at Masada terminates earlier. The microfacies was investigated by continuous thin section microscopy, while additional macroscopic information is provided from over- and underlying sediment sections. A revised chronology using age modelling in OxCal (Ramsey 2008; Ramsey 2009; Ramsey and Lee 2013) was developed for the ICDP core and a floating varve chronology was constructed at Masada. Using these new microfacies data from marginal (Masada) and deep-water (ICDP core) sediments, the hydroclimatic variability during the final stage of Lake Lisan can be reconstructed, which could provide important insights into the development of human sedentism in the region at this time.
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  • 16
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    Physical properties of sea ice cores from site BGC3 measured on legs 1 to 3 of the MOSAiC expedition (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: We present sea ice temperature and salinity data from first-year ice (FYI) and second-year ice (SYI) relevant to the temporal development of sea ice permeability and brine drainage efficiency from the early growth phase in October 2019 to the onset of spring warming in May 2020. Our dataset was collected in the central Arctic Ocean during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Expedition in 2019 to 2020. MOSAiC was an international transpolar drift expedition in which the German icebreaker RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. In October 2019, RV Polarstern moored to an ice floe in the Siberian sector of the Arctic at 85 degrees north and 137 degrees east to begin the drift towards the North Pole and the Fram Strait via the Transpolar Drift Stream. The data presented here were collected during the first three legs of the expedition, so all the coring activities took place on the same floe. The end dates of legs 1, 2, and 3 were 13 December, 24 February, and 4 June, respectively. The dataset contributed to a baseline study entitled, Deciphering the properties of different Arctic ice types during the growth phase of the MOSAiC floes: Implications for future studies. The study highlights downward directed gas pathways in FYI and SYI by inferring sea ice permeability and potential brine release from several time series of temperature and salinity measurements. The physical properties presented in this paper lay the foundation for subsequent analyses on actual gas contents measured in the ice cores, as well as air-ice and ice-ocean gas fluxes. Sea ice cores were collected with a Kovacs Mark II 9 cm diameter corer. To measure ice temperatures, about 4.5 cm deep holes were drilled into the core (intervals varied by site and leg) . The temperatures were measured by a digital thermometer within minutes after the cores were retrieved. The ice cores were placed into pre-labelled plastic sleeves sealed at the bottom end. The ice cores were transported to RV Polarstern and stored in a -20 degrees Celsius freezer. Each of the cores was sub-sampled, melted at room temperature, and processed for salinity within one or two days. The practical salinity was estimated by measuring the electrical conductivity and temperature of the melted samples using a WTW Cond 3151 salinometer equipped with a Tetra-Con 325 four-electrode conductivity cell. The practical salinity represents the the salinity estimated from the electrical conductivity of the solution. The dataset also contains derived variables, including sea ice density, brine volume fraction, and the Rayleigh number.
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  • 17
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    Fatty acid distribution in ancient permafrost deposits at the Batagay Megaslump, East Siberia (2022)
    PANGAEA
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    Publication Date: 2023-01-30
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    Varve thickness of lateglacial ICDP core 5017-1-A (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: This dataset provides annually resolved microfacies data from ICDP core 5017-1-A, retrieved from the deep northern Dead Sea basin in 2010/11, for the last glacial-interglacial transition (ca. 17-11.5 ka BP). Sediments of the Lisan Formation were investigated between ~101 and 88.5 m sediment depth below lake floor by continuous thin section microscopy, while additional macroscopic information is provided from core catchers, as well as from over- and underlying sediment sections. Thin sections were prepared following the standard procedure by Brauer and Casanova (2001) that was adjusted for salty sediments. Thin section analyses were performed on overlapping large-scale thin sections using a Zeiss Axiolab pol microscope at magnifications of 50-400x. Microfacies analyses included varve counting and measurements of varve and sublayer thickness.
    Language: English
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  • 19
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    Harmonized in-situ observations of surface energy fluxes and environmental drivers at 64 Arctic vegetation and glacier sites - Metadata (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Despite the importance of surface energy budgets (SEBs) for land-climate interactions in the Arctic, uncertainties in their prediction persist. In situ observational data of SEB components - useful for research and model validation - are collected at relatively few sites across the terrestrial Arctic, and not all available datasets are readily interoperable. Furthermore, the terrestrial Arctic consists of a diversity of vegetation types, which are generally not well represented in land surface schemes of current Earth system models. This dataset contains metadata information about surface energy budget components measured at 64 tundra and glacier sites 〉60° N across the Arctic. This information was taken from the open-access repositories FLUXNET, Ameriflux, AON, GC-Net and PROMICE. The contained datasets are associated with the publication vegetation type as an important predictor of the Arctic Summer Land Surface Energy Budget by Oehri et al. 2022, and intended to support research of surface energy budgets and their relationship with environmental conditions, in particular vegetation characteristics across the terrestrial Arctic.
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  • 20
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    Age model of lateglacial ICDP core 5017-1-A (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: This dataset provides the results from Bayesian age depth modelling in OxCal for ICDP core 5017-1-A, retrieved from the deep northern Dead Sea basin in 2010/11, for the last glacial-interglacial transition between ~101 and 88.5 m sediment depth below lake floor (ca. 17-11.5 ka BP). The model was performed in OxCal v.4.4 using a P_Sequence (1,1,C(-2,2)) (Ramsey 2008; Ramsey 2009; Ramsey and Lee 2013) and includes three tephrochronological ages from Neugebauer et al. (2021) and three radiocarbon ages from Kitagawa et al. (2017).
    Language: English
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  • 21
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    Harmonized in-situ observations of surface energy fluxes and environmental drivers at 64 Arctic vegetation and glacier sites - Surface energy budget componenent data (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Despite the importance of surface energy budgets (SEBs) for land-climate interactions in the Arctic, uncertainties in their prediction persist. In situ observational data of SEB components - useful for research and model validation - are collected at relatively few sites across the terrestrial Arctic, and not all available datasets are readily interoperable. Furthermore, the terrestrial Arctic consists of a diversity of vegetation types, which are generally not well represented in land surface schemes of current Earth system models. This dataset comprises harmonized, standardized and aggregated in-situ observations of surface energy budget components measured at 64 sites on vegetated and glaciated sites north of 60° latitude, in the time period from 1994 till 2021. The surface energy budget components include net radiation, sensible heat flux, latent heat flux, ground heat flux, net shortwave radiation, net longwave radiation, surface temperature and albedo, which were aggregated to daily mean, minimum and maximum values from hourly and half-hourly measurements. Data were retrieved from the monitoring networks FLUXNET, AmeriFlux, AON, GC-Net and PROMICE.
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  • 22
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    Physical properties of sea ice cores from site BGC2 measured on legs 1 to 3 of the MOSAiC expedition (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: We present sea ice temperature and salinity data from first-year ice (FYI) and second-year ice (SYI) relevant to the temporal development of sea ice permeability and brine drainage efficiency from the early growth phase in October 2019 to the onset of spring warming in May 2020. Our dataset was collected in the central Arctic Ocean during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Expedition in 2019 to 2020. MOSAiC was an international transpolar drift expedition in which the German icebreaker RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. In October 2019, RV Polarstern moored to an ice floe in the Siberian sector of the Arctic at 85 degrees north and 137 degrees east to begin the drift towards the North Pole and the Fram Strait via the Transpolar Drift Stream. The data presented here were collected during the first three legs of the expedition, so all the coring activities took place on the same floe. The end dates of legs 1, 2, and 3 were 13 December, 24 February, and 4 June, respectively. The dataset contributed to a baseline study entitled, Deciphering the properties of different Arctic ice types during the growth phase of the MOSAiC floes: Implications for future studies. The study highlights downward directed gas pathways in FYI and SYI by inferring sea ice permeability and potential brine release from several time series of temperature and salinity measurements. The physical properties presented in this paper lay the foundation for subsequent analyses on actual gas contents measured in the ice cores, as well as air-ice and ice-ocean gas fluxes. Sea ice cores were collected with a Kovacs Mark II 9 cm diameter corer. To measure ice temperatures, about 4.5 cm deep holes were drilled into the core (intervals varied by site and leg) . The temperatures were measured by a digital thermometer within minutes after the cores were retrieved. The ice cores were placed into pre-labelled plastic sleeves sealed at the bottom end. The ice cores were transported to RV Polarstern and stored in a -20 degrees Celsius freezer. Each of the cores was sub-sampled, melted at room temperature, and processed for salinity within one or two days. The practical salinity was estimated by measuring the electrical conductivity and temperature of the melted samples using a WTW Cond 3151 salinometer equipped with a Tetra-Con 325 four-electrode conductivity cell. The practical salinity represents the the salinity estimated from the electrical conductivity of the solution. The dataset also contains derived variables, including sea ice density, brine volume fraction, and the Rayleigh number.
    Language: English
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  • 23
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    Physical properties of sea ice cores for biogeochemistry studies measured on legs 1 to 3 of the MOSAiC expedition (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: We present sea ice temperature and salinity data from first-year ice (FYI) and second-year ice (SYI) relevant to the temporal development of sea ice permeability and brine drainage efficiency from the early growth phase in October 2019 to the onset of spring warming in May 2020. Our dataset was collected in the central Arctic Ocean during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Expedition in 2019 to 2020. MOSAiC was an international transpolar drift expedition in which the German icebreaker RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. In October 2019, RV Polarstern moored to an ice floe in the Siberian sector of the Arctic at 85 degrees north and 137 degrees east to begin the drift towards the North Pole and the Fram Strait via the Transpolar Drift Stream. The data presented here were collected during the first three legs of the expedition, so all the coring activities took place on the same floe. The end dates of legs 1, 2, and 3 were 13 December, 24 February, and 4 June, respectively. The dataset contributed to a baseline study entitled, Deciphering the properties of different Arctic ice types during the growth phase of the MOSAiC floes: Implications for future studies. The study highlights downward directed gas pathways in FYI and SYI by inferring sea ice permeability and potential brine release from several time series of temperature and salinity measurements. The physical properties presented in this paper lay the foundation for subsequent analyses on actual gas contents measured in the ice cores, as well as air-ice and ice-ocean gas fluxes. Sea ice cores were collected with a Kovacs Mark II 9 cm diameter corer. To measure ice temperatures, about 4.5 cm deep holes were drilled into the core (intervals varied by site and leg) . The temperatures were measured by a digital thermometer within minutes after the cores were retrieved. The ice cores were placed into pre-labelled plastic sleeves sealed at the bottom end. The ice cores were transported to RV Polarstern and stored in a -20 degrees Celsius freezer. Each of the cores was sub-sampled, melted at room temperature, and processed for salinity within one or two days. The practical salinity was estimated by measuring the electrical conductivity and temperature of the melted samples using a WTW Cond 3151 salinometer equipped with a Tetra-Con 325 four-electrode conductivity cell. The practical salinity represents the the salinity estimated from the electrical conductivity of the solution. The dataset also contains derived variables, including sea ice density, brine volume fraction, and the Rayleigh number.
    Language: English
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  • 24
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    Biogeochemical parameters of thawed sediments underneath a Yedoma and Alas thermokarst lake in Eastern Siberia, version 2 (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: This dataset describes two 17 m long sediment cores taken from beneath two thermokarst lakes in the Yukechi Alas, Central Yakutia, Russia. The first core was taken from below an Alas thermokarst lake (YU-L7; 61.76397°N, 130.46442°E) and the second core below and Yedoma lake (YU-L15; 61.76086°N, 130.47466°E). The dataset presents biogeochemical and biomarker parameters of sediment cores YU-L7 and YU-L15. Biogeochemical analyses include total carbon (TC) content, total organic carbon (TOC) content, total nitrogen (TN) content. Biomarker parameters include the n-alkane concentration, average chain length (ACL), carbon preference index (CPI), brGDGT concentration, archaeol concentration and the isoGDGT-0 concentration. The n-alkanes were measured in the aliphatic fraction by gas chromatography-mass spectromety using a Trace GC Ultra coupled to a DSQ MS. The branched and isoprenoid glycerol dialkyl glycerol tetraethers, as well as the dialkyl glycerol diether lipid (archaeol) were measured in the NSO fraction using a Shimadzu LC-10AD high-performance liquid chromatograph coupled to a Finnigan TSQ 7000 mass spectrometer via an atmospheric pressure chemical ionization interface. The pH soil is the sediment pH which was assessed by adding 6.12 mL of 0.01 M CaCl~2~ to ~2.5 g dried sediment and measuring with a Multilab 540 (WTW) at 20°C.
    Language: English
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  • 25
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    Physical properties of sea ice cores from site BGC1 measured on legs 1 to 3 of the MOSAiC expedition (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: We present sea ice temperature and salinity data from first-year ice (FYI) and second-year ice (SYI) relevant to the temporal development of sea ice permeability and brine drainage efficiency from the early growth phase in October 2019 to the onset of spring warming in May 2020. Our dataset was collected in the central Arctic Ocean during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Expedition in 2019 to 2020. MOSAiC was an international transpolar drift expedition in which the German icebreaker RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. In October 2019, RV Polarstern moored to an ice floe in the Siberian sector of the Arctic at 85 degrees north and 137 degrees east to begin the drift towards the North Pole and the Fram Strait via the Transpolar Drift Stream. The data presented here were collected during the first three legs of the expedition, so all the coring activities took place on the same floe. The end dates of legs 1, 2, and 3 were 13 December, 24 February, and 4 June, respectively. The dataset contributed to a baseline study entitled, Deciphering the properties of different Arctic ice types during the growth phase of the MOSAiC floes: Implications for future studies. The study highlights downward directed gas pathways in FYI and SYI by inferring sea ice permeability and potential brine release from several time series of temperature and salinity measurements. The physical properties presented in this paper lay the foundation for subsequent analyses on actual gas contents measured in the ice cores, as well as air-ice and ice-ocean gas fluxes. Sea ice cores were collected with a Kovacs Mark II 9 cm diameter corer. To measure ice temperatures, about 4.5 cm deep holes were drilled into the core (intervals varied by site and leg) . The temperatures were measured by a digital thermometer within minutes after the cores were retrieved. The ice cores were placed into pre-labelled plastic sleeves sealed at the bottom end. The ice cores were transported to RV Polarstern and stored in a -20 degrees Celsius freezer. Each of the cores was sub-sampled, melted at room temperature, and processed for salinity within one or two days. The practical salinity was estimated by measuring the electrical conductivity and temperature of the melted samples using a WTW Cond 3151 salinometer equipped with a Tetra-Con 325 four-electrode conductivity cell. The practical salinity represents the the salinity estimated from the electrical conductivity of the solution. The dataset also contains derived variables, including sea ice density, brine volume fraction, and the Rayleigh number.
    Language: English
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  • 26
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    Harmonized in-situ observations of surface energy fluxes and environmental drivers at 64 Arctic vegetation and glacier sites (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Despite the importance of surface energy budgets (SEBs) for land-climate interactions in the Arctic, uncertainties in their prediction persist. In-situ observational data of SEB components - useful for research and model validation - are collected at relatively few sites across the terrestrial Arctic, and not all available datasets are readily interoperable. Furthermore, the terrestrial Arctic consists of a diversity of vegetation types, which are generally not well represented in land surface schemes of current Earth system models. Therefore, we here provide four datasets comprising: 1. Harmonized, standardized and aggregated in situ observations of SEB components at 64 vegetated and glaciated sites north of 60° latitude, in the time period 1994-2021 2. A description of all study sites and associated environmental conditions, including the vegetation types, which correspond to the classification of the Circumpolar Arctic Vegetation Map (CAVM, Raynolds et al. 2019). 3. Data generated in a literature synthesis from 358 study sites on vegetation or glacier (〉=60°N latitude) covered by 148 publications. 4. Metadata, including data contributor information and measurement heights of variables associated with Oehri et al. 2022.
    Language: English
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  • 27
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    Lithology of lateglacial ICDP core 5017-1-A (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: This dataset provides lithological data from ICDP core 5017-1-A, retrieved from the deep northern Dead Sea basin in 2010/11, for the last glacial-interglacial transition (ca. 17-11.5 ka BP). The microfacies of the Lisan Formation was investigated between ~101 and 88.5 m sediment depth below lake floor by continuous thin section microscopy, while additional macroscopic information is provided from core catchers, as well as from over- and underlying sediment sections. Thin sections were prepared following the standard procedure by Brauer and Casanova (2001) that was adjusted for salty sediments. Thin section analyses were performed on overlapping large-scale thin sections using a Zeiss Axiolab pol microscope at magnifications of 50-400x.
    Language: English
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  • 28
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    Rock and paleomagnetic results of sediment core MSM33\_855-1 over the past 30 ka (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Language: English
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  • 29
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    Lateral and vertical carbon fluxes from the polygonal tundra in the Lena River Delta, Siberia (summer 2014) (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: This dataset contains observations of water discharge rates and concentrations of dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) from a polygonal tundra site in the Lena River Delta, Russia. This dataset also contains lateral carbon fluxes of DOC and DIC that were estimated from these observations. Additionally, this dataset contains vertical fluxes of carbon dioxide and methane from the same study site. All observations were recorded on Samoylov Island (N 72.377188, E 126.495144) in the summer of 2014. The abbreviations A1, A2 and B refer to three outflows on the island where the hydrological parameters were observed (A1: N 72.379991, E 126.480886; A2: N 72.380134, E 126.481433; B: N 72.381348, E 126.483482). All outflows were approximately 10 meters. More information can be found in https://doi.org/10.5194/bg-19-3863-2022.
    Language: English
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  • 30
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    Harmonized in-situ observations of surface energy fluxes and environmental drivers at 64 Arctic vegetation and glacier sites - Environmental conditions (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Despite the importance of surface energy budgets (SEBs) for land-climate interactions in the Arctic, uncertainties in their prediction persist. In situ observational data of SEB components - useful for research and model validation - are collected at relatively few sites across the terrestrial Arctic, and not all available datasets are readily interoperable. Furthermore, the terrestrial Arctic consists of a diversity of vegetation types, which are generally not well represented in land surface schemes of current Earth system models. This dataset describes the environmental conditions for 64 tundra and glacier sites (〉=60°N latitude) across the Arctic, for which in situ measurements of surface energy budget components were harmonized (see Oehri et al. 2022). These environmental conditions are (proxies of) potential drivers of SEB-components and could therefore be called SEB-drivers. The associated environmental conditions, include the vegetation types graminoid tundra, prostrate dwarf-shrub tundra, erect-shrub tundra, wetland complexes, barren complexes (≤ 40% horizontal plant cover), boreal peat bogs and glacier. These land surface types (apart from boreal peat bogs) correspond to the main classification units of the Circumpolar Arctic Vegetation Map (CAVM, Raynolds et al. 2019). For each site, additional climatic and biophysical variables are available, including cloud cover, snow cover duration, permafrost characteristics, climatic conditions and topographic conditions.
    Language: English
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  • 31
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    Marine ERT surveys acquired in the region of Tuktoyaktuk Island, Northwest Territories, Canada (2022)
    PANGAEA
    Details
    Publication Date: 2023-02-01
    Description: This dataset contains over 30 marine Electrical Resistivity Tomography (ERT) profiles taken in September 2021 around Tuktoyaktuk Island (NWT / Beaufort Sea, Canada). The measurements were part of the “Mackenzie Delta Permafrost Field Campaign” (mCan2021) within the “Modular Observation solutions for Earth Systems” (MOSES) program. The collected profiles consist of numerous adjacent vertical soundings in a (quasi-symmetric) reciprocal Wenner-Schlumberger array, using a floating cable towed behind a boat. GPS records along the electrode streamer were taken, enabling the improvement of pre- processing by excluding measurements for which the cable was curved and electrode positions deviated too widely. The aim of the study was to determine the depth of the submarine permafrost. Cleaned data is provided in csv format.
    Language: English
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  • 32
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    Permafrost related measurements in the Mackenzie Delta, Northwest Territories, Canada, from the MOSES field campaign in September 2021 (2022)
    PANGAEA
    Details
    Publication Date: 2023-02-01
    Description: This collection contains permafrost related measurements in the Mackenzie Delta, NWT, Canada from the MOSES (Modular Observation Solutions for Earth Systems) field campaign in September 2021. The field campaign was focused on three subaquatic sites: a small thermokarst lake along the ITH just south of Trail Valley Creek, "Lake 3", an elongated lake with known methane occurence in the outer Mackenzie Delta, "Swiss Cheese Lake", and north and south of Tuktoyaktuk Island. At "Swiss Cheese Lake", we measured methane and CO2 concentrations in surface water and in the air above the lake, lake bed temperatures and detailed bathymetry. At "Lake 3" we measured active layer thickness on the lake banks, lake bed temperatures, and detailed bathymetry, as well as an ERT survey to estimate the talik depth below the lake. North and south of Tuktoyaktuk Island, we measured active layer thickness and sea bed temperatures and did an extensive ERT survey to obtain the depth of the subsea permafrost table. An additional passive seismic survey was carried out and the data is available at https://doi.org/10.5880/GIPP.202199.1.
    Language: English
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  • 33
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    Lacustrine and amphibian ERT surveys acquired in the region of Inuvik, Northwest Territories, Canada (2022)
    PANGAEA
    Details
    Publication Date: 2023-02-01
    Description: This dataset contains seven Electrical Resistivity Tomography (ERT) profiles taken in September 2021 at “Lake 3”, a thermokarst lake near the Inuvik-Tuktoyaktuk-Highway (ITH), about 50 km north of Inuvik (NWT, Canada). The measurements were part of the “Mackenzie Delta Permafrost Field Campaign” (mCan2021) within the “Modular Observation solutions for Earth Systems” (MOSES) program. The collected profiles consist of numerous adjacent vertical soundings in a (quasi-symmetric) reciprocal Wenner-Schlumberger array. In addition to surveys on the lake, using a floating cable towed behind a boat, two “amphibian” profiles were taken. Starting as purely terrestrial surveys using metal spike electrodes, the cable was then moved towards the lake with some of the electrodes floating on the water surface, and some still on land. The aim of the study was to determine permafrost properties on the land, to detect a possible talik beneath the lake and to especially be able to infer the transition between the two below the shoreline.
    Language: English
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  • 34
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    Organic Matter Supply and Utilization in Oxygen Minimum Zones (2022)
    Annual Reviews
    Details
    Publication Date: 2024-02-07
    Description: Organic matter (OM) plays a significant role in the formation of oxygen minimum zones (OMZs) and associated biogeochemical cycling. OM supply processes to the OMZ include physical transport, particle formation, and sinking as well as active transport by migrating zooplankton and nekton. In addition to the availability of oxygen and other electron acceptors, the remineralization rate of OM is controlled by its biochemical quality. Enhanced microbial respiration of OM can induce anoxic microzones in an otherwise oxygenated water column. Reduced OM degradation under low-oxygen conditions, on the other hand, may increase the CO2 storage time in the ocean. Understanding the interdependencies between OM and oxygen cycling is of high relevance for an ocean facing deoxygenation as a consequence of global warming. In this review, we describe OM fluxes into and cycling within two large OMZs associated with eastern boundary upwelling systems that differ greatly in the extent of oxygen loss: the highly oxygen-depleted OMZ in the tropical South Pacific and the moderately hypoxic OMZ in the tropical North Atlantic. We summarize new findings from a large German collaborative research project, Collaborative Research Center 754 (SFB 754), and identify knowledge gaps and future research priorities.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
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  • 35
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    The Land–Sea Connection: Insights Into the Plant Lineage from a Green Algal Perspective (2022)
    Annual Reviews
    Details
    Publication Date: 2024-02-07
    Description: The colonization of land by plants generated opportunities for the rise of new heterotrophic life forms, including humankind. A unique event underpinned this massive change to earth ecosystems-the advent of eukaryotic green algae. Today, an abundant marine green algal group, the prasinophytes, alongside prasinodermophytes and nonmarine chlorophyte algae, is facilitating insights into plant developments. Genome-level data allow identification of conserved proteins and protein families with extensive modifications, losses, or gains and expansion patterns that connect to niche specialization and diversification. Here, we contextualize attributes according to Viridiplantae evolutionary relationships, starting with orthologous protein families, and then focusing on key elements with marked differentiation, resulting in patchy distributions across green algae and plants. We place attention on peptidoglycan biosynthesis, important for plastid division and walls; phytochrome photosensors that are master regulators in plants; and carbohydrate-active enzymes, essential to all manner of carbohydratebiotransformations. Together with advances in algal model systems, these areas are ripe for discovering molecular roles and innovations within and across plant and algal lineages
    Type: Article , PeerReviewed
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  • 36
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    Contributions of different sea-level processes to high-tide flooding along the US coastline (2022)
    American Geophysical Union
    Details
    Publication Date: 2023-01-14
    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 Journal of Geophysical Research: Oceans 127(7), (2022): e2021JC018276, https://doi.org/10.1029/2021JC018276.
    Description: Coastal communities across the United States (U.S.) are experiencing an increase in the frequency of high-tide flooding (HTF). This increase is mainly due to sea-level rise (SLR), but other factors such as intra- to inter-annual mean sea level variability, tidal anomalies, and non-tidal residuals also contribute to HTF events. Here we introduce a novel decomposition approach to develop and then analyze a new database of different sea-level components. Those components represent processes that act on various timescales to contribute to HTF along the U.S. coastline. We find that the relative importance of components to HTF events strongly varies in space and time. Tidal anomalies contribute the most along the west and northeast coasts, where HTF events mostly occur in winter. Non-tidal residuals are most important along the Gulf of Mexico and mid-Atlantic coasts, where HTF events mostly occur in fall. We also quantify the minimum number of components that were required to cause HTF events in the past and how this number changed over time. The results highlight that at present, due to SLR, fewer components are needed to combine to push water levels above HTF thresholds, but tidal anomalies alone are still not sufficient to reach HTF thresholds in most locations. Finally, we explore how co-variability between different components leads to compounding effects. In some places, positive correlation between sea-level components leads to significantly more HTF events than would be expected if sea-level components were uncorrelated, whereas in other places negative correlation leads to fewer HTF events.
    Description: his work was supported by NASA's Sea Level Change Team award number 80NSSC20K1241. S.L. also acknowledges support by the China Scholarship Council (no. 201904910413) and the Ministry of Science and Technology of the People's Republic of China (grant no. 2011YQ120045).
    Description: 2023-01-14
    Repository Name: Woods Hole Open Access Server
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  • 37
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    Vertical SOC distribution and aromatic carbon in centuries old charcoal‐rich Technosols (2022)
    Bonhage, Alexander ; Raab, Thomas ; Schneider, Anna ; [et al.]
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publication Date: 2023-01-21
    Description: Charcoal‐rich Technosols on century‐old relict charcoal hearths (RCHs) are the subject of ongoing research regarding potential legacy effects that result from historic charcoal production and subsequent charcoal amendments on forest soil properties and forest ecosystems today. RCHs consist mostly of Auh horizons that are substantially enriched in soil organic carbon (SOC), of which the largest part seems to be of pyrogenic origin (PyC). However, the reported range of SOC and PyC contents in RCH soil also suggests that they are enriched in nonpyrogenic SOC. RCH soils are discussed as potential benchmarks for the long‐term influence of biochar amendment and the post‐wildfire influences on soil properties. In this study, we utilised a large soil sample dataset (n = 1245) from 52 RCH sites in north‐western Connecticut, USA, to quantify SOC contents by total element analysis. The contents of condensed highly aromatic carbon as a proxy for black carbon (BC) were predicted by using a modified benzene polycarboxylated acid (BPCA) marker method in combination with diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy‐based partial least square regression (r2 = 0.89). A high vertical spatial sampling resolution allowed the identification of soil organic matter (SOM) enrichment and translocation processes. The results show an average 75% and 1862% increase in TOC and BPCA‐derived carbon, respectively, for technogenic Auh horizons compared to reference soils. In addition to an increase in aromatic properties, increased carboxylic properties of the RCH SOC suggest self‐humification effects of degrading charcoal and thereby the continuing formation of leachable aromatic carbon compounds, which could have effects on pedogenic processes in buried soils. Indeed, we show BPCA‐derived carbon concentrations in intermediate technogenic Cu horizons and buried top/subsoils that suggest vertical translocation of highly aromatic carbon originating in RCH Auh horizons. Topmost Auh horizons showed a gradual decrease in total organic carbon (TOC) contents with increasing depth, suggesting accumulation of recent, non‐pyrogenic SOM. Lower aliphatic absorptions in RCH soil spectra suggest different SOM turnover dynamics compared to reference soils. Furthermore, studied RCH soils featured additional TOC enrichment, which cannot be fully explained now. Highlights BC to TOC ratio and high resolution vertical SOC distribution in 52 RCH sites were studied. RCH soils non‐BC pool was potentially different to reference soils. RCH soils feature TOC accumulation in the topmost horizon. There is BC translocation into buried soils on RCH sites.
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Keywords: ddc:631.4 ; benzene polycarboxylated acid marker (BPCA) ; black carbon ; charcoal degradation ; charcoal kiln ; pyrogenic carbon ; relict charcoal hearth ; biochar
    Language: English
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    Skillful long-lead prediction of summertime heavy rainfall in the US Midwest from sea surface salinity (2022)
    American Geophysical Union
    Details
    Publication Date: 2023-01-07
    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(13), (2022): e2022GL098554, https://doi.org/10.1029/2022GL098554.
    Description: Summertime heavy rainfall and its resultant floods are among the most harmful natural hazards in the US Midwest, one of the world's primary crop production areas. However, seasonal forecasts of heavy rain, currently based on preseason sea surface temperature anomalies (SSTAs), remain unsatisfactory. Here, we present evidence that sea surface salinity anomalies (SSSAs) over the tropical western Pacific and subtropical North Atlantic are skillful predictors of summer time heavy rainfall one season ahead. A one standard deviation change in tropical western Pacific SSSA is associated with a 1.8 mm day−1 increase in local precipitation, which excites a teleconnection pattern to extratropical North Pacific. Via extratropical air-sea interaction and long memory of midlatitude SSTA, a wave train favorable for US Midwest heavy rain is induced. Combined with soil moisture feedbacks bridging the springtime North Atlantic salinity, the SSSA-based statistical prediction model improves Midwest heavy rainfall forecasts by 92%, complementing existing SSTA-based frameworks.
    Description: This study is supported by the NSF PREEVENTS program under ICER-1663138 (LL) and ICER-1663704 (RWS and CCU).
    Description: 2023-01-07
    Keywords: Sea surface salinity ; Midwest precipitation ; Heavy rainfall ; Long-lead prediction
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 39
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    Submarine groundwater discharge in the northern Bohai Sea, China: Implications for coastal carbon budgets and buffering capacity (2022)
    American Geophysical Union
    Details
    Publication Date: 2023-01-20
    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 Journal of Geophysical Research: Biogeosciences 127(8), (2022): e2022JG006810, https://doi.org/10.1029/2022jg006810.
    Description: Submarine groundwater discharge (SGD) has been widely recognized as an important source of dissolved nutrients in coastal waters and affects nutrient biogeochemistry. In contrast, little information is available on SGD impacts on coastal carbon budgets. Here, we assessed the SGD and associated carbon (dissolved inorganic carbon [DIC] and total alkalinity [TA]) fluxes in Liaodong Bay (the largest bay of the Bohai Sea, China) and discussed their border implications for coastal DIC budget and buffering capacity. Based on 223Ra and 228Ra mass balance models, the SGD flux was estimated to be (0.92–1.43) × 109 m3 d−1. SGD was the largest contributor of DIC, accounting for 55%–77% of the total DIC sources. The low ratio (〈1) of SGD-derived TA to DIC fluxes and negative correlation between radium isotopes and pH in seawater implied that SGD would potentially reduce seawater pH in Liaodong Bay. Combining the groundwater carbon data in Liaodong Bay with literature data, we found that the SGD-derived DIC flux off China was 4–9 times greater than those from rivers. By analyzing the TA/DIC ratios in groundwater along the Chinese coast and related carbon fluxes, SGD was thought to partially reduce the CO2 buffer capacity in receiving seawater. These results obtained at the bay scale and national scale suggest that SGD is a significant component of carbon budget and may play a critical role in modulating coastal buffering capacity and atmospheric CO2 sequestration.
    Description: his research was supported by National Natural Science Foundation of China (Grant Nos. 42130703, 42007170) and the Science, Technology and Innovation Commission of Shenzhen (Grant No. 20200925174525002.
    Description: 2023-01-20
    Keywords: Submarine groundwater discharge ; Radium isotopes ; Dissolved inorganic carbon ; Total alkalinity ; Carbon budgets ; Buffering capacity
    Repository Name: Woods Hole Open Access Server
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  • 40
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    Potential erodibility of semi‐arid steppe soils derived from aggregate stability tests (2022)
    Koza, Moritz ; Pöhlitz, Julia ; Prays, Aleksey ; [et al.]
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publication Date: 2023-01-26
    Description: Erosion is a severe threat to the sustainable use of agricultural soils. However, the structural resistance of soil against the disruptive forces steppe soils experience under field conditions has not been investigated. Therefore, 132 topsoils under grass‐ and cropland covering a large range of physico‐chemical soil properties (sand: 2–76%, silt: 18–80%, clay: 6–30%, organic carbon: 7.3–64.2 g kg−1, inorganic carbon: 0.0–8.5 g kg−1, pH: 4.8–9.5, electrical conductivity: 32–946 μS cm−1) from northern Kazakhstan were assessed for their potential erodibility using several tests. An adjusted drop‐shatter method (low energy input of 60 Joule on a 250‐cm3 soil block) was used to estimate the stability of dry soil against weak mechanical forces, such as saltating particles striking the surface causing wind erosion. Three wetting treatments with various conditions and energies (fast wetting, slow wetting, and wet shaking) were applied to simulate different disruptive effects of water. Results indicate that aggregate stability was higher for grassland than cropland soils and declined with decreasing soil organic carbon content. The results of the drop‐shatter test suggested that 29% of the soils under cropland were at risk of wind erosion, but only 6% were at high risk (i.e. erodible fraction 〉60%). In contrast, the fast wetting treatment revealed that 54% of the samples were prone to become “very unstable” and 44% “unstable” during heavy rain or snowmelt events. Even under conditions comparable to light rain events or raindrop impact, 53–59% of the samples were “unstable.” Overall, cropland soils under semi‐arid conditions seem much more susceptible to water than wind erosion. Considering future projections of increasing precipitation in Kazakhstan, we conclude that the risk of water erosion is potentially underestimated and needs to be taken into account when developing sustainable land use strategies. Highlights Organic matter is the important binding agent enhancing aggregation in steppe topsoils. Tillage always declines aggregate stability even without soil organic carbon changes. All croplands soil are prone to wind or water erosion independent of their soil properties. Despite the semi‐arid conditions, erosion risk by water seems higher than by wind.
    Description: Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347
    Keywords: ddc:631.4 ; climate change ; land use ; soil organic carbon ; soil texture ; water erosion ; wind erosion
    Language: English
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  • 41
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    Non‐exchangeable stable hydrogen isotope ratios in clay minerals and soil clay fractions: A method test (2022)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publication Date: 2023-01-20
    Description: Stable hydrogen isotope ratios (δ2H values) in structural hydroxyl groups of pedogenic clay minerals are inherited from the surrounding water at the time of their formation. Only non‐exchangeable H preserves the environmental forensic and paleoclimate information (δ2Hn value). To measure δ2Hn values in structural H of clay minerals and soil clay fractions, we adapted a steam equilibration method by accounting for high hygroscopicity. Our δ2Hn values for USGS57 biotite (−95.3 ± SD 0.9‰) and USGS58 muscovite (30.7 ± 1.4‰) differed slightly but significantly from the reported δ2H values (−91.5 ± 2.4‰ and −28.4 ± 1.6‰), because the minerals contained 1.1%–4.4% of exchangeable H. The low SD of replicate measurements (n = 3) confirmed a high precision. The clay separation method including destruction of Fe oxides, carbonates and soil organic matter, and dispersion did not significantly change the δ2Hn values of five different clay minerals. However, we were unable to remove all organic matter from the soil clay fractions resulting in an estimated bias of 1‰ in two samples and 15‰ in the carbon‐richest sample. Our results demonstrate that δ2Hn values of structural H of clay minerals and soil clay fractions can be reliably measured without interference from atmospheric water and the method used to separate the soil clay fraction. Highlights We tested steam equilibration to determine stable isotope ratios of structural H in clay. Gas‐tight capsule sealing in Ar atmosphere was necessary to avoid remoistening. Our steam equilibration method showed a high accuracy and precision. The clay separation method did not change stable isotope ratios of structural H in clay.
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Keywords: ddc:549 ; controlled isotope exchange technique ; deuterium ; montmorillonite ; soil clay separation ; soil organic matter removal ; steam equilibration ; structural H ; USGS57 biotite ; vermiculite ; δ2H
    Language: English
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  • 42
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    Reducing tillage intensity benefits the soil micro‐ and mesofauna in a global meta‐analysis (2022)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publication Date: 2024-03-22
    Description: Soil fauna drives crucial processes of energy and nutrient cycling in agricultural systems, and influences the quality of crops and pest incidence. Soil tillage is the most influential agricultural manipulation of soil structure, and has a profound influence on soil biology and its provision of ecosystem services. The objective of this study was to quantify through meta‐analyses the effects of reducing tillage intensity on density and diversity of soil micro‐ and mesofaunal communities, and how these effects vary among different pedoclimatic conditions and interact with concurrent management practices. We present the results of a global meta‐analysis of available literature data on the effects of different tillage intensities on taxonomic and functional groups of soil micro‐ and mesofauna. We collected paired observations (conventional vs. reduced forms of tillage/no‐tillage) from 133 studies across 33 countries. Our results show that reduced tillage intensity or no‐tillage increases the total density of springtails (+35%), mites (+23%), and enchytraeids (+37%) compared to more intense tillage methods. The meta‐analyses for different nematode feeding groups, life‐forms of springtails, and taxonomic mite groups showed higher densities under reduced forms of tillage compared to conventional tillage on omnivorous nematodes (+53%), epedaphic (+81%) and hemiedaphic (+84%) springtails, oribatid (+43%) and mesostigmatid (+57%) mites. Furthermore, the effects of reduced forms of tillage on soil micro‐ and mesofauna varied with depth, climate and soil texture, as well as with tillage method, tillage frequency, concurrent fertilisation, and herbicide application. Our findings suggest that reducing tillage intensity can have positive effects on the density of micro‐ and mesofaunal communities in areas subjected to long‐term intensive cultivation practices. Our results will be useful to support decision making on the management of soil faunal communities and will facilitate modelling efforts of soil biology in global agroecosystems. HIGHLIGHTS Global meta‐analysis to estimate the effect of reducing tillage intensity on micro‐ and mesofauna Reduced tillage or no‐tillage has positive effects on springtail, mite and enchytraeid density Effects vary among nematode feeding groups, springtail life forms and mite suborders Effects vary with texture, climate and depth and depend on the tillage method and frequency
    Description: Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347
    Description: https://doi.org/10.20387/bonares-eh0f-hj28
    Keywords: ddc:631.4 ; agricultural land use ; conservation agriculture ; conventional agriculture ; soil biodiversity ; soil cultivation
    Language: English
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  • 43
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    Defining Hydrogeological Site Similarity with Hierarchical Agglomerative Clustering (2022)
    Blackwell Publishing Ltd | Malden, US
    Details
    Publication Date: 2024-02-28
    Description: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Hydrogeological information about an aquifer is difficult and costly to obtain, yet essential for the efficient management of groundwater resources. Transferring information from sampled sites to a specific site of interest can provide information when site‐specific data is lacking. Central to this approach is the notion of site similarity, which is necessary for determining relevant sites to include in the data transfer process. In this paper, we present a data‐driven method for defining site similarity. We apply this method to selecting groups of similar sites from which to derive prior distributions for the Bayesian estimation of hydraulic conductivity measurements at sites of interest. We conclude that there is now a unique opportunity to combine hydrogeological expertise with data‐driven methods to improve the predictive ability of stochastic hydrogeological models.〈/p〉
    Description: 〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉〈italic〉Article impact statement〈/italic〉: This article introduces hierarchical clustering as a method for defining a notion of site similarity; the aim of this method is to improve the derivation of prior distributions in Bayesian methods in hydrogeology.〈/p〉
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: https://github.com/GeoStat-Bayesian/geostatDB
    Description: https://github.com/GeoStat-Bayesian/exPrior
    Description: https://github.com/GeoStat-Bayesian/siteSimilarity
    Keywords: ddc:551.49 ; hydrogeological sites ; hydrogeological modeling
    Language: English
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  • 44
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    Zoobenthos and sediments time series at List Reede, Sylt, Germany, 2003 to 2019 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored over 17 years for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, always during preceeded high tide. Granulometric sediment composition was analysed from a sub-sample of each box-core using a diffraction laser particle-size analyser. Macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. The amount of shell detritus was quantified as wet-weight in the benthos samples. From 2003 to 2007 sampling was approximatively monthly and from 2008 to 2013 seasonally. When a new ship with larger drought was put into operation, the number of sampling sites needed to be reduced to 33 from 2014 onwards and sampling frequency was only once per year in autumn.
    Keywords: AWI_Coast; Coastal Ecology @ AWI; Macrobenthos; sediment analysis; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: application/zip, 34 datasets
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  • 45
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    Oceanographic parameters for the sample stations of Ludwig Prandtl cruise LP20160725 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: Offshore wind energy is a steadily growing sector contributing to the worldwide energy production. The impact of these offshore constructions on the marine environment, however, remains unclear in many aspects. In fact, little is known about potential emissions from corrosion protection systems such as organic coatings or galvanic anodes composed of Al and Zn alloys, used to protect offshore structures. In order to assess potential chemical emissions from offshore wind farms and their impact on the marine environment water and sediment samples were taken in the surroundings of offshore wind farms of the German Bight between 25.07.2016 and 02.08.2016. At every sampling station oceanographic parameters were measured directly on board with respective probes of a multimeter covering pH, dissolved oxygen, temperature and conductivity.
    Keywords: Conductivity, electrical; Date/Time of event; Event label; Helmholtz-Zentrum Hereon; Hereon; Latitude of event; Longitude of event; LP20160725; LP20160725_Stat_1_2; LP20160725_Stat_10_2; LP20160725_Stat_11_3; LP20160725_Stat_12_3; LP20160725_Stat_13_3; LP20160725_Stat_14_2; LP20160725_Stat_15_3; LP20160725_Stat_16_3; LP20160725_Stat_17_2; LP20160725_Stat_18_3; LP20160725_Stat_19_3; LP20160725_Stat_2_2; LP20160725_Stat_20_3; LP20160725_Stat_21_3; LP20160725_Stat_22_3; LP20160725_Stat_23_2; LP20160725_Stat_24_3; LP20160725_Stat_25_2; LP20160725_Stat_26_3; LP20160725_Stat_27_3; LP20160725_Stat_28_3; LP20160725_Stat_29_3; LP20160725_Stat_3_3; LP20160725_Stat_30_3; LP20160725_Stat_31_3; LP20160725_Stat_32_3; LP20160725_Stat_33_3; LP20160725_Stat_34_3; LP20160725_Stat_35_3; LP20160725_Stat_36_3; LP20160725_Stat_37_3; LP20160725_Stat_38_3; LP20160725_Stat_39_3; LP20160725_Stat_4_2; LP20160725_Stat_40_3; LP20160725_Stat_41_3; LP20160725_Stat_42_3; LP20160725_Stat_43_3; LP20160725_Stat_44_3; LP20160725_Stat_45_3; LP20160725_Stat_46_3; LP20160725_Stat_47_3; LP20160725_Stat_48_3; LP20160725_Stat_49_3; LP20160725_Stat_5_2; LP20160725_Stat_50_3; LP20160725_Stat_51_3; LP20160725_Stat_52_3; LP20160725_Stat_53_3; LP20160725_Stat_54_3; LP20160725_Stat_55_3; LP20160725_Stat_56_2; LP20160725_Stat_57_2; LP20160725_Stat_6_3; LP20160725_Stat_7_3; LP20160725_Stat_8_3; LP20160725_Stat_9_3; Ludwig Prandtl; Multimeter; North Sea; Oxygen, dissolved; pH; S001; S002; S003; S004; S005; S006; S007; S008; S009; S010; S011; S012; S013; S014; S015; S016; S017; S018; S019; S020; S021; S022; S023; S024; S025; S026; S027; S028; S029; S030; S031; S032; S033; S034; S035; S036; S037; S038; S039; S040; S041; S042; S043; S044; S045; S046; S047; S048; S049; S050; S051; S052; S053; S054; S055; S056; Sample code/label; Station label; Temperature, water; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 342 data points
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  • 46
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    Topsoil isotopic composition (δ2H) from the catchment of lake Khar Nuur, Mongolia (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-13
    Keywords: Altai Mountains, Mongolia; compound-specific biomarker isotopes; DEPTH, soil; Depth, soil, maximum; Depth, soil, minimum; Event label; GASC; Gas chromatograph; KN_2H_A1; KN_2H_A10; KN_2H_A11; KN_2H_A12; KN_2H_A13; KN_2H_A2; KN_2H_A3; KN_2H_A4; KN_2H_A5; KN_2H_A6; KN_2H_A7; KN_2H_A8; KN_2H_A9; lake surface sediments; LATITUDE; LONGITUDE; Mongolia; n-Alkane C27, δD; n-Alkane C27, δD, standard deviation; n-Alkane C31, δD; n-Alkane C31, δD, standard deviation; Sample ID; SOIL; Soil profile; topsoils
    Type: Dataset
    Format: text/tab-separated-values, 65 data points
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  • 47
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    Stable oxygen and carbon isotopes of planktic and benthic foraminifera from the Lardos SW hill section, Rhodes, Greece (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-13
    Description: Stable oxygen and carbon isotopes were measured on (i) the planktic foraminifera species Globigerinoides ruber (white) and alternatively, in samples in which G. ruber was lacking, on Globigerinoides conglobatus; and (ii) the benthic foraminifera species Cibicidoides pachyderma and alternatively, in samples in which C. pachyderma was lacking, on Cibicides lobatulus. 10–15 planktic and 4-6 benthic specimens of the fraction 〉250 μm were selected. Additionally, attention was paid to select specimens of similar size to minimise influences of metabolic effects and changing preferential habitats during ontogeny. For cleaning and removal of sediment, the selected foraminifera were cracked between two glass plates, transferred to a sample cup, covered with ethanol and immerged into an ultrasonic bath for 5–10 s. The sediment brought into suspension was decanted. The procedure was repeated until the ethanol remained clear after the ultrasonic bath. The cleaned foraminifera were reacted with 100% phosphoric acidat 75 °C using a Kiel III online carbonate preparation line connected to a ThermoFinnigan 252 mass spectrometer (Geochemical Laboratory of the GeoZentrum Nordbayern,Germany). Isotopic data are expressed in per mil relative to V-PDB by assigning a δ18O-value of -2.20 ‰ to NBS19, using the standard δ-notation. The reproducibility was checked by replicate analysis of laboratory standards and was found to be better than ±0.05 for δ18O and δ13C (1σ).
    Keywords: Benthic and planktonic foraminifera; Greece; Rhodes; stable oxygen and carbon isotopes
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 48
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    Physicochemical parameters of the water column for the sample stations of the Weser river campaign 2016 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: A key task in understanding and mapping the complex mass transport pathways and potential transformation processes of contaminants in coastal regions such as the German Bight is to determine and evaluate the most significant contribution sources into coastal areas. Rivers represent one key input source within this context. As part of a river campaign in June 2016, sediment and freshwater samples were taken from the Weser river and its tributaries to identify their elemental and isotopic fingerprint and to investigate potential inputs to the German Bight. At every sampling station physicochemical parameters of the water column were measured directly after sampling with respective probes of a multimeter covering pH, dissolved oxygen, temperature and conductivity.
    Keywords: Conductivity, electrical; Date/Time of event; Event label; Helmholtz-Zentrum Hereon; Hereon; Latitude of event; Longitude of event; Multimeter; Oxygen, dissolved; pH; pH sensor; Sample code/label; Station label; Temperature, water; Water sample; WESER_2016; WESER_2016_Stat_1_1; WESER_2016_Stat_10_1; WESER_2016_Stat_11_1; WESER_2016_Stat_12_1; WESER_2016_Stat_13_1; WESER_2016_Stat_14_1; WESER_2016_Stat_15_1; WESER_2016_Stat_16_1; WESER_2016_Stat_17_1; WESER_2016_Stat_18_1; WESER_2016_Stat_19_1; WESER_2016_Stat_2_1; WESER_2016_Stat_20_1; WESER_2016_Stat_23_1; WESER_2016_Stat_24_1; WESER_2016_Stat_25_1; WESER_2016_Stat_26_1; WESER_2016_Stat_27_1; WESER_2016_Stat_28_1; WESER_2016_Stat_29_1; WESER_2016_Stat_3_1; WESER_2016_Stat_30_1; WESER_2016_Stat_31_1; WESER_2016_Stat_32_1; WESER_2016_Stat_33_1; WESER_2016_Stat_34_1; WESER_2016_Stat_35_1; WESER_2016_Stat_36_1; WESER_2016_Stat_37_1; WESER_2016_Stat_38_1; WESER_2016_Stat_4_1; WESER_2016_Stat_5_1; WESER_2016_Stat_6_1; WESER_2016_Stat_7_1; WESER_2016_Stat_8_1; WESER_2016_Stat_9_1; Weser_S_01; Weser_S_02; Weser_S_03; Weser_S_04; Weser_S_05; Weser_S_06; Weser_S_07; Weser_S_08; Weser_S_09; Weser_S_10; Weser_S_11; Weser_S_12; Weser_S_13; Weser_S_14; Weser_S_15; Weser_S_16; Weser_S_17; Weser_S_18; Weser_S_19; Weser_S_20; Weser_S_23; Weser_S_24; Weser_S_25; Weser_S_26; Weser_S_27; Weser_S_28; Weser_S_29; Weser_S_30; Weser_S_31; Weser_S_32; Weser_S_33; Weser_S_34; Weser_S_35; Weser_S_36; Weser_S_37; Weser_S_38; Weser, Germany, Europe; WS
    Type: Dataset
    Format: text/tab-separated-values, 213 data points
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  • 49
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    Physicochemical parameters of the water column for the sample stations of the Ems river campaign 2016 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: In order to understand and map the complex mass transport pathways and possible transformation processes of contaminants in coastal regions such as the German Bight, the main coastal contributors must be identified and evaluated. In this context, rivers represent a major input source. In the framework of a river campaign from 20.06.16 till 25.06.2016, sediment and freshwater samples of the Ems and its tributaries were taken to determine their elemental and isotopic fingerprint and to investigate possible inputs into the German Bight. All sediment samples were obtained using a Van Veen grab sampler and were analyzed for their grain size distribution by laser diffraction.
    Keywords: Conductivity, electrical; Date/Time of event; EM2016_Stat_1_1; EM2016_Stat_10_1; EM2016_Stat_11_1; EM2016_Stat_12_1; EM2016_Stat_13_1; EM2016_Stat_14_1; EM2016_Stat_15_1; EM2016_Stat_16_1; EM2016_Stat_17_1; EM2016_Stat_18_1; EM2016_Stat_19_1; EM2016_Stat_2_1; EM2016_Stat_20_1; EM2016_Stat_21_1; EM2016_Stat_22_1; EM2016_Stat_23_1; EM2016_Stat_24_1; EM2016_Stat_25_1; EM2016_Stat_26_1; EM2016_Stat_27_1; EM2016_Stat_3_1; EM2016_Stat_4_1; EM2016_Stat_5_1; EM2016_Stat_6_1; EM2016_Stat_7_1; EM2016_Stat_8_1; EM2016_Stat_9_1; EMS_2016; Ems_S_01; Ems_S_02; Ems_S_03; Ems_S_04; Ems_S_05; Ems_S_06; Ems_S_07; Ems_S_08; Ems_S_09; Ems_S_10; Ems_S_11; Ems_S_12; Ems_S_13; Ems_S_14; Ems_S_15; Ems_S_16; Ems_S_17; Ems_S_18; Ems_S_19; Ems_S_20; Ems_S_21; Ems_S_22; Ems_S_23; Ems_S_24; Ems_S_25; Ems_S_26; Ems_S_27; Ems, Germany, Europe; Event label; Helmholtz-Zentrum Hereon; Hereon; Latitude of event; Longitude of event; Multimeter; Oxygen, dissolved; pH; Sample code/label; Station label; Temperature, water; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 162 data points
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    DATA PANGAEA
  • 50
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    Oceanic surface water isotopic compositions calibrated data from POLARSTERN cruise PS93.1 (ARK-XXIX/2.1) (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: Isotopic measurements of seawater sampled on-board Polarstern research vessel
    Keywords: Arctic; ARK-XXIX/2.1; AWI_Envi; CT; d18O; DATE/TIME; Deuterium excess; ISOARC; Isotope signature of water vapour over the Arctic Ocean; LATITUDE; LONGITUDE; Polarstern; Polar Terrestrial Environmental Systems @ AWI; PS93.1; PS93.1-track; surface water; Underway cruise track measurements; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 57 data points
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    DATA PANGAEA
  • 51
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    Oceanic surface water isotopic compositions calibrated data from POLARSTERN cruise PS93.2 (ARK-XXIX/2.2) (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: Isotopic measurements of seawater sampled on-board Polarstern research vessel
    Keywords: Arctic; ARK-XXIX/2.2; AWI_Envi; CT; d18O; DATE/TIME; Deuterium excess; ISOARC; Isotope signature of water vapour over the Arctic Ocean; LATITUDE; LONGITUDE; Polarstern; Polar Terrestrial Environmental Systems @ AWI; PS93.2; PS93.2-track; surface water; Underway cruise track measurements; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 63 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 52
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2012 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 1098 individuals from the five sampling dates in 2012.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 5490 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 53
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2013 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 669 individuals from the three sampling dates in 2013.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 2370 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 54
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2017 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 259 individuals from the 2017 sampling.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 1160 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 55
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2016 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 253 individuals from the 2016 sampling.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 1070 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 56
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    Oceanic surface water isotopic compositions calibrated data from POLARSTERN cruise PS97 (ANT-XXXI/3) (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-17
    Description: Isotopic measurements of seawater sampled on-board Polarstern research vessel
    Keywords: ANT-XXXI/3; AWI_Envi; CT; d18O; DATE/TIME; Deuterium excess; ISOARC; Isotope signature of water vapour over the Arctic Ocean; LATITUDE; LONGITUDE; ocean; Polarstern; Polar Terrestrial Environmental Systems @ AWI; PS97; PS97-track; surface water; Underway cruise track measurements; water isotopes; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 63 data points
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    DATA PANGAEA
  • 57
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    Oceanic surface water isotopic compositions calibrated data from POLARSTERN cruise PS99.2 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-17
    Description: Isotopic measurements of seawater sampled on-board Polarstern research vessel
    Keywords: ARK-XXX/1.2; AWI_Envi; CT; d18O; DATE/TIME; dD; Deuterium excess; ISOARC; Isotope signature of water vapour over the Arctic Ocean; LATITUDE; LONGITUDE; ocean; Polarstern; Polar Terrestrial Environmental Systems @ AWI; PS99.2; PS99.2-track; surface water; Underway cruise track measurements; water isotopes; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 54 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 58
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    Oceanic surface water isotopic compositions calibrated data from POLARSTERN cruise PS100 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-17
    Description: Isotopic measurements of seawater sampled on-board Polarstern research vessel
    Keywords: ARK-XXX/2, GN05; AWI_Envi; CT; d18O; DATE/TIME; dD; Deuterium excess; ISOARC; Isotope signature of water vapour over the Arctic Ocean; LATITUDE; LONGITUDE; ocean; Polarstern; Polar Terrestrial Environmental Systems @ AWI; PS100; PS100-track; surface water; Underway cruise track measurements; water isotopes; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 141 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 59
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    Oceanic surface water isotopic compositions calibrated data from POLARSTERN cruise PS104 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-17
    Description: Isotopic measurements of seawater sampled on-board Polarstern research vessel
    Keywords: ANT-XXXII/3; AWI_Envi; CT; d18O; DATE/TIME; dD; Deuterium excess; ISOARC; Isotope signature of water vapour over the Arctic Ocean; LATITUDE; LONGITUDE; ocean; Polarstern; Polar Terrestrial Environmental Systems @ AWI; PS104; PS104-track; surface water; Underway cruise track measurements; water isotopes; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 90 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 60
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2003 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 1629 individuals from the four sampling dates in 2003.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 6430 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 61
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2004 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 3198 individuals from the 11 sampling dates in 2004.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 12290 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 62
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2005 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 15918 individuals from the 10 sampling dates in 2005.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 14645 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 63
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2006 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 1990 individuals from the nine sampling dates in 2006.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 7955 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 64
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2007 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 3555 individuals from the 10 sampling dates in 2007.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 11565 data points
    Location Call Number Expected Availability
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  • 65
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2009 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 734 individuals from the three sampling dates in 2009.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 2645 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 66
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2010 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 672 individuals from the three sampling dates in 2010.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 2760 data points
    Location Call Number Expected Availability
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  • 67
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2011 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 1018 individuals from the five sampling dates in 2011.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 4565 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 68
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2008 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 1072 individuals from the five sampling dates in 2008.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 3830 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 69
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2014 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 1055 individuals from the 2014 sampling.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; Disc diameter; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 1605 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 70
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2015 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 294 individuals from the 2015 sampling.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 1074 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 71
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2018 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 120 individuals from the 2018 sampling.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 510 data points
    Location Call Number Expected Availability
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  • 72
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    Size of hard-shelled individuals in the zoobenthos time series at List Reede, Sylt, Germany, in 2019 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: A shallow subtidal area in the northern Wadden Sea was monitored for sediment parameters and macrobenthic fauna using stratified random sampling of a grid of 50 sampling positions. Samples were collected with a Reineck-type box-corer of 0.02 m² surface area, macrobenthos (sieved through 1 mm square meshes and fixed in buffered formalin solution) was counted, identified to species level, and the size of hard-shelled individuals measured. This dataset contains the size measurements of 134 individuals from the 2019 sampling.
    Keywords: AWI_Coast; Body length; Carapace width; Coastal Ecology @ AWI; DATE/TIME; DEPTH, water; Diameter, including arms; German Bight Wadden Sea; LATITUDE; List_Reede; Lister_Ley; Location; LONGITUDE; Long-term time series Sylt; Macrobenthos; MULT; Multiple investigations; Number of individuals per size class; Sample code/label; Shell diameter; Shell length; Species; Time-Series Data; Wadden Sea
    Type: Dataset
    Format: text/tab-separated-values, 655 data points
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  • 73
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    Radiocarbon data of high molecular weight fatty acids from sediment core ARA04C/37 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-22
    Keywords: 37GVC1; AGE; ARA04C; ARA04C/37; Araon; Arctic Ocean; Beaufort Sea; BICYCLE-SE carbon cycle model; Biomarker; Blank- and methyl-corrected; DEPTH, sediment/rock; Fraction modern carbon; Fraction modern carbon, standard deviation; GC; Gravity corer; Radiocarbon analysis (14C); radiocarbon isotope (Fm); Rock-Eval; Sample material
    Type: Dataset
    Format: text/tab-separated-values, 45 data points
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  • 74
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    Radiocarbon data of bulk organic carbon from sediment core ARA04C/37 (2022)
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    Details
    Publication Date: 2023-03-22
    Keywords: 37GVC1; AGE; ARA04C; ARA04C/37; Araon; Arctic Ocean; Beaufort Sea; BICYCLE-SE carbon cycle model; Biomarker; DEPTH, sediment/rock; Fraction modern carbon; Fraction modern carbon, standard deviation; GC; Gravity corer; Radiocarbon analysis (14C); radiocarbon isotope (Fm); Rock-Eval; Sample material
    Type: Dataset
    Format: text/tab-separated-values, 144 data points
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  • 75
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    Impact of Indian Ocean surface temperature gradient reversals on the Indian Summer Monsoon over the last 26 kyr (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-06
    Description: The 26,000-year long time-series analyzed in a marine sediment core from the northern Bay of Bengal includes Mg/Ca-based SST estimates, Ba/Ca-based mixed layer salinity estimates, and estimates of ice-volume corrected d18O of the mixed layer. The data are provide new insights into the control of Indian Summer Monsoon over the last 26,000 years, including a strong influence of zonal and meridional SST gradient changes within the tropical Indian Ocean on Indian Summer Monsoon variability.
    Keywords: Ba/Ca-based salinitt estimates; Bay of Bengal; Holocene climate variability; Indian Monsoon; Indian Ocean Dipole; last deglaciation; Last Glacial Maximum; Mg/Ca-based paleotemperatures; runoff; Salinity; Temperature
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 76
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    Aerosol lithium concentration data from the Indian and Pacific ocean (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-04
    Description: A total of 125 aerosol samples were analysed for their lithium concentrations and deposition flux. Daily aerosol samples were collected from the Pacific Ocean during CLIVAR-CO2 Repeat Hydrography Sections P16 and P2. The P16 section follows 150°-152°W and was divided into two legs, a southern leg from 17°S to 71°S in January-February 2005, and a northern leg from 16°S to 56°N in February-March 2006. CLIVAR-CO2 section P2 from Japan to San Diego, along 30°N, was visited in June-August 2004. The aerosol data from both CLIVAR-CO2 sections include aerosol lithium concentration measured following digestion in HF:HNO3:HCl mixture and corrected for sea-salt contributions (Li xs total), the P16 data also includes aerosol lithium extracted with ultrapure deionised water (≥18 MΩ) by pulling 100 mL of deionised water within ten seconds through the filter (Li xs MQ). Aerosol lithium deposition flux was calculated based on the local rain rate.
    Keywords: aerosol; Cruise/expedition; DATE/TIME; Indian Ocean; LATITUDE; Lithium; Lithium, flux; Lithium, soluble; LONGITUDE; Pacific Ocean; Precipitation, annual, mean; Sinking velocity
    Type: Dataset
    Format: text/tab-separated-values, 999 data points
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  • 77
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    Physical properties of sediments in the Norwegian Trough measured on short cores taken between 1992 and 1996 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-02
    Description: Wet bulk density, dry bulk density, porosity, water content and water saturation of sediments from the Norwegian Trough were determined on short cores taken between 1992 and 1996. On the cruises 17-25 July 1992 (station 2-55) and 1-6 July 1993 (station 56-75) in the easternmost part of the Skagerrak, cores were taken with a Niemistö corer. Plastic liners (length 76 cm, outer diameter 63 mm, inner diameter 59 mm) were placed in the corer with holes drilled every five centimetres downwards. These holes were sealed with tape before sampling. After the sample was taken, the tape was removed. In most cases, there was water along the inside of the plastic liner. This water was allowed to drain before sub-samples were taken. Then plastic syringes without a tip were carefully inserted into each hole, and 10 ml of wet sediment was taken out. The sub-samples were then pressed out of the syringes into plastic bags that had been weighed in advance and stored in a refrigerator until they were measured in the laboratory. Upon arrival at the laboratory, the plastic bags with samples were weighed, the weight of the plastic bags was deducted, and the weight of 10 ml of the wet sample was noted. The weight of the dry sample was found by transferring the sample material onto a pre-weighted ceramic bowl before it was weighed again, then drying the bowl with sample in drying cabinet at 70 degrees C for 24 hours, and finally weighing the bowl with sample after drying. The weight of 10 ml of dry sample corresponds to the difference before and after drying. On the cruises 5-16 June 1994 (stations 76-133), 17-24 July 1995 (stations 135-180) and 9-19 September 1996 (stations 181-286), cores were taken with a multicorer. Plastic liners (length 61 cm, outer diameter 63 mm, inner diameter 59 mm) were placed in the corer, which after sampling was closed at both ends with rubber caps to prevent water in the core and on top of the core from leaking out or to evaporate. The cores were then transported to the laboratory in an upright position and stored as such until they were opened. After removing the rubber cap on top of the core, the water was drained by drilling holes in the plastic liner just above the top of the sediment. Lying in a rack, the core was then divided lengthwise with a circular saw by sawing through the plastic liner on both sides of the core. A thin string was then pulled in the saw gap through the sediment and the core split in two halves. Metal rings of known weight and volume were used to take sub-samples. The ring (approx. 2 cm in diameter) was gently pressed into the sediment at certain depths in the middle of one of the core halves, until the ring was full, and then gently tilted out with a spatula. The ends were levelled with a wire saw or spatula, and the excess sediment was discarded. The wet sample plus ring was weighed immediately after the sediment on the outside of the metal ring was removed. The sample was then pressed out into a pre-weighed porcelain bowl. Then the weight of bowl plus wet sample was measured, and the weight of wet sample was determined. The sample was dried in a porcelain bowl in a heating cabinet at 105 degrees C for 24 hours, before the sample plus bowl was weighed again and the dry weight was determined. More details on the methods can be found in Rise and Bøe (1995) and Bøe and Rise (1997).
    Keywords: 10; 100; 101; 102; 103; 104; 105; 106; 107; 108; 109; 11; 110; 111; 112; 113; 114; 115; 116; 117; 118; 119; 12; 120; 121; 122; 123; 127; 128; 129; 13; 130; 131; 132; 133; 135; 136; 137; 138; 139; 14; 140; 141; 142; 143; 144; 145; 146; 147; 148; 149; 15; 150; 151; 152; 153; 154; 155; 156; 157; 158; 16; 160; 161; 162; 163; 164; 165; 166; 166B; 167; 169; 17; 170; 171; 172; 173; 175; 176; 177; 178; 179; 18; 180; 181; 182; 183; 184; 185; 186; 188; 189; 19; 190; 191; 192; 193; 194; 195; 196; 197; 198; 199; 2; 200; 201; 203; 205; 206; 207; 208; 209; 21; 210; 211; 212; 213; 214; 215; 216; 22; 220; 221; 222; 223; 224; 225; 226; 227; 228; 229; 23; 230; 231; 232; 235; 236; 237; 238; 239; 24; 240; 241; 242; 243; 244; 245; 246; 247; 25; 251; 252; 253; 254; 255; 256; 257; 258; 259; 26; 260; 261; 262; 263; 264; 268; 269; 27; 270; 271; 272; 273; 274; 275; 276; 277; 28; 280; 281; 282; 283; 284; 285; 286; 29; 3; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 4; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 5; 50; 51; 52; 53; 54; 55; 56; 57; 58; 59; 6; 60; 61; 62; 63; 64; 65; 66; 67; 68; 69; 7; 70; 71; 72; 73; 74; 75; 76; 77; 78; 79; 8; 80; 81; 82; 83; 84; 85; 86; 87; 88; 89; 9; 90; 91; 92; 93; 94; 95; 96; 97; 98; 99; Date/Time of event; Density, dry bulk; Density, wet bulk; DEPTH, sediment/rock; dry bulk density; Event label; Håkon Mosby; HM9205; HM9205_10; HM9205_11; HM9205_12; HM9205_13; HM9205_14; HM9205_15; HM9205_16; HM9205_17; HM9205_18; HM9205_19; HM9205_2; HM9205_21; HM9205_22; HM9205_23; HM9205_24; HM9205_25; HM9205_26; HM9205_27; HM9205_28; HM9205_29; HM9205_3; HM9205_30; HM9205_31; HM9205_32; HM9205_33; HM9205_34; HM9205_35; HM9205_36; HM9205_37; HM9205_38; HM9205_39; HM9205_4; HM9205_40; HM9205_41; HM9205_42; HM9205_43; HM9205_44; HM9205_45; HM9205_46; HM9205_47; HM9205_48; HM9205_49; HM9205_5; HM9205_50; HM9205_51; HM9205_52; HM9205_53; HM9205_54; HM9205_55; HM9205_6; HM9205_7; HM9205_8; HM9205_9; HM9307; HM9307_56; HM9307_57; HM9307_58; HM9307_59; HM9307_60; HM9307_61; HM9307_62; HM9307_63; HM9307_64; HM9307_65; HM9307_66; HM9307_67; HM9307_68; HM9307_69; HM9307_70; HM9307_71; HM9307_72; HM9307_73; HM9307_74; HM9307_75; HM9404; HM9404_100; HM9404_101; HM9404_102; HM9404_103; HM9404_104; HM9404_105; HM9404_106; HM9404_107; HM9404_108; HM9404_109; HM9404_110; HM9404_111; HM9404_112; HM9404_113; HM9404_114; HM9404_115; HM9404_116; HM9404_117; HM9404_118; HM9404_119; HM9404_120; HM9404_121; HM9404_122; HM9404_123; HM9404_127; HM9404_128; HM9404_129; HM9404_130; HM9404_131; HM9404_132; HM9404_133; HM9404_76; HM9404_77; HM9404_78; HM9404_79; HM9404_80; HM9404_81; HM9404_82; HM9404_83; HM9404_84; HM9404_85; HM9404_86; HM9404_87; HM9404_88; HM9404_89; HM9404_90; HM9404_91; HM9404_92; HM9404_93; HM9404_94; HM9404_95; HM9404_96; HM9404_97; HM9404_98; HM9404_99; HM9506; HM9506_135; HM9506_136; HM9506_137; HM9506_138; HM9506_139; HM9506_140; HM9506_141; HM9506_142; HM9506_143; HM9506_144; HM9506_145; HM9506_146; HM9506_147; HM9506_148; HM9506_149; HM9506_150; HM9506_151; HM9506_152; HM9506_153; HM9506_154; HM9506_155; HM9506_156; HM9506_157; HM9506_158; HM9506_160; HM9506_161; HM9506_162; HM9506_163; HM9506_164; HM9506_165; HM9506_166; HM9506_166B; HM9506_167; HM9506_169; HM9506_170; HM9506_171; HM9506_172; HM9506_173; HM9506_175; HM9506_176; HM9506_177; HM9506_178; HM9506_179; HM9506_180; HM9606; HM9606_181; HM9606_182; HM9606_183; HM9606_184; HM9606_185; HM9606_186; HM9606_188; HM9606_189; HM9606_190; HM9606_191; HM9606_192; HM9606_193; HM9606_194; HM9606_195; HM9606_196; HM9606_197; HM9606_198; HM9606_199; HM9606_200; HM9606_201; HM9606_203; HM9606_205; HM9606_206; HM9606_207; HM9606_208; HM9606_209; HM9606_210; HM9606_211; HM9606_212; HM9606_213; HM9606_214; HM9606_215; HM9606_216; HM9606_220; HM9606_221; HM9606_222; HM9606_223; HM9606_224; HM9606_225; HM9606_226; HM9606_227; HM9606_228; HM9606_229; HM9606_230; HM9606_231; HM9606_232; HM9606_235; HM9606_236; HM9606_237; HM9606_238; HM9606_239; HM9606_240; HM9606_241; HM9606_242; HM9606_243; HM9606_244; HM9606_245; HM9606_246; HM9606_247; HM9606_251; HM9606_252; HM9606_253; HM9606_254; HM9606_255; HM9606_256; HM9606_257; HM9606_258; HM9606_259; HM9606_260; HM9606_261; HM9606_262; HM9606_263; HM9606_264; HM9606_268; HM9606_269; HM9606_270; HM9606_271; HM9606_272; HM9606_273; HM9606_274; HM9606_275; HM9606_276; HM9606_277; HM9606_280; HM9606_281; HM9606_282; HM9606_283; HM9606_284; HM9606_285; HM9606_286; Latitude of event; Longitude of event; MUC; MultiCorer; NC; Niemistoe corer; North Sea; Norwegian Trough, North Sea; porosity; Porosity; Saturation; Skagerrak; Station label; water content; Water content, sediment; water saturation; wet bulk density
    Type: Dataset
    Format: text/tab-separated-values, 6366 data points
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  • 78
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    Solid phase concentrations in the sediment at 5 sites along a water depth transect in the Gulf of Mexico (Louisiana continental shelf) (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Description: All sediments were freeze-dried and the porosity was determined from the weight loss upon freeze drying. To determine the total elemental concentrations of aluminum (Al), Co, Fe, Mn, Ni, and S, ca. 125 mg of sediment was digested in 2.5 ml mixed acid (HNO3:HClO4; 2:3) and 2.5 ml 40% HF at 90◦C. After fuming off the acids, the residue was redissolved in 4.5% HNO3. The solutions were subsequently analyzed on an ICP-OES. The analytical uncertainty based on duplicates and triplicates was 〈1% for Al, 〈4.2% for Co, 〈1.6% for Fe, 〈2.5% for Mn, 〈2.3% for Ni, and 〈1.7% for S. A subsample of circa 300 mg was decalcified with 2 wash steps of 1M HCl and subsequently dried, powdered and analyzed for carbon (C) using an elemental analyser (Fisons Instrumentsmodel NA 1500 NCS). Organic C content was determined after correction for the weight loss following decalcification. The analytical uncertainty based on duplicates and triplicates was 〈0.07 wt%.
    Keywords: 64PE434_1; 64PE434_2; 64PE434_3; 64PE434_4; 64PE434_5; 64PE434_NICO_Leg7; Aluminium, total; Carbon, organic; Cobalt, total; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Event label; Gulf of Mexico; Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES); Iron; Iron, total; Iron ascorbic acid extraction; Iron disulfide; Iron II, ferrous iron; Iron monosulfide; Iron oxides; Manganese, total; Nickel, total; Pelagia; Porosity; Station 1; Station 2; Station 3; Station 4; Station 5; Sulfur, total; Surface water sample; SWS
    Type: Dataset
    Format: text/tab-separated-values, 1511 data points
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  • 79
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    Porewater concentrations of ammonium, nitrite, nitrate, sulfate, hydrogen sulfide, dissolved iron and dissolved manganese at 5 sites along a water depth transect in the Gulf of Mexico (Louisiana continental shelf) (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Description: Porewater samples for NH4+, NO3- , and NO2- were analyzed on board with Quattro gas-segmented continuous flow analysers using the indophenolblue method (NH+4), and the sulphanyl-amide method (NOx). Porewater sulfide was determined spectrophotometrically using phenylenediamine and ferric chloride. Porewater samples for SO4 2- were analyzed by ion-chromatography. Dissolved Fe and Mn were analyzed by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES; Spectro Arcos). Porewater concentrations were around or below the detection limit (0.5 and 0.8 μmol L−1, respectively) and are therefore not presented.
    Keywords: 64PE434_1; 64PE434_2; 64PE434_3; 64PE434_4; 64PE434_5; 64PE434_NICO_Leg7; Ammonium; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Event label; Gulf of Mexico; Hydrogen sulfide; Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES); Ion chromatography; Iron, dissolved; Manganese, dissolved; Nitrate; Nitrite; Pelagia; see description in data abstract; Station 1; Station 2; Station 3; Station 4; Station 5; Sulfate; Surface water sample; SWS
    Type: Dataset
    Format: text/tab-separated-values, 839 data points
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  • 80
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    Surface sediment and topsoil biomarker isotope data from Lake Khar Nuur and its catchment, Mongolia (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-13
    Description: The compound-specific hydrogen isotopic composition (δ2H) of n-alkanes well reflect hydrological conditions in lake sediments, but the spatial distribution of the δ2H signal of terrestrial and aquatic n - alkanes within lakes is not systematically investigated so far. Therefore, we analyzed compound-specific δ2H of terrestrial and aquatic n-alkanes of 46 surface sediment samples from Lake Khar Nuur, a semi-arid and high-altitude lake in the Mongolian Altai (2,486 m a.s.l.; 48°37'22.9N, 88°56'42.5E). Additionally, we analyzed the terrestrial δ2H signal of 13 topsoils from the catchment. Lake surface sediments were recovered from the lake floor with a Van Veen Grab sampler and topsoils (0-5 cm) were sampled as a mixed samples of three subsamples from each site during a fieldtrip in July 2018. Sample extraction procedure is described in detail by Strobel et al. (in revision). Compound-specific δ2H was analyzed for the terrestrial n-alkane C31 (δ2HC31) in the topsoil and surface sediment samples, whereas δ2H of the aquatic C23 (δ2HC23) was analyzed in the lake surface sediments. One topsoil site is grown by Betula nana (L.) showing C27 as the dominant chain-length, which was target for compound-specific δ2H measurements at this site (δ2HC27). All δ2H measurements were carried out on an IsoPrime visION isotope ratio mass spectrometer coupled to an Agilent 7890A GC via a GC5 pyrolysis/combustion interface operating in pyrolysis mode with a Cr (ChromeHD) reactor at 1050 °C.
    Keywords: compound-specific biomarker isotopes; lake surface sediments; Mongolia; topsoils
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 81
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    Limnological, sedimentological, mineralogical and geological data of 76 aquatic ecosystems of the northern Neotropics (from Yucatán Peninsula Mexico to Nicaragua) sampled in 2013 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: Here, we present 23 water physical (temperature, dissolved oxygen, pH, conductivity) and chemical (major anions Cl-, SO42-, CO32-, HCO3- and cations Ca2+, K+, Mg2+, Na+), sedimentological (total carbon (TC), total inorganic carbon (TIC), total organic carbon (TOC), total nitrogen (TN)), mineralogical (quartz, carbonate, phyllosilicates and feldspars) and geological (altitude, bedrock type and age of sediments) variables of aquatic systems of the Northern Neotropical region. Sampling was conducted in 76 aquatic systems during July-October 2013, coinciding with the rainy season in the region. Sampling sites are located on the Yucatán Peninsula Mexico (n=28), Guatemala (n=26), El Salvador (n=14), Honduras (n=5) and Nicaragua (n=3). We aim to identify limnological regions based on the measured variables and to infer the influence of geodiversity in observed patterns. Water physical and chemical variables were measured in situ with a WTW Multi Set 350i multiparameter probe at a water depth of 0.5 m. Water samples for analysis of major anions and cations were collected at water depths of 0.5 m below surface. TC and TN in sediments contents were determined by combustion with a LECO TruSpec Macro CHN analyzer. TIC was quantified with a Woesthoff Carmhograph C-16. TOC was calculated by subtracting TIC from TC. Qualitative and semi-quantitative mineralogical compounds were examined by x-ray diffraction with a RIGAKU Miniflex600. ArcGIS software was used to identify geological attributes of sampling sites such as bedrock and age of sediments. Altitude, latitude, and longitude were determined with the navigator Garmin GPSmap 60c.
    Keywords: ArcGIS software; Bedrock type; Bicarbonate ion; Calcium; Calculated by subtracting TIC from TC; Carbon, inorganic, total; Carbon, organic, total; Carbon, total; Carbonate; Carbonate, Intensity; Chloride; Conductivity, electrolytic; DATE/TIME; DEPTH, water; Device type; ELEVATION; Epoch; Event label; Feldspar, Intensity; LATITUDE; LECO TruSpec Macro CHN analyzer; Limnolgy; LONGITUDE; Magnesium; mineralogy; MULT; Multiple investigations; Nitrogen, total; northern Neotropical region; northern Neotropics; Oxygen; pH; Phyllosilicates, Intensity; Potassium; Quartz, intensity; Sample ID; Sedimentology; Sodium; Sulfate; Temperature, water; Woesthoff Carmhograph C-16; WTW Multi Set 350i multiparameter probe; X-ray diffraction (RIGAKU Miniflex600); YP-GSHN-2013; YP-GSHN-2013_ALE; YP-GSHN-2013_AMA; YP-GSHN-2013_APA; YP-GSHN-2013_ARA; YP-GSHN-2013_ATI; YP-GSHN-2013_BAC; YP-GSHN-2013_CAL; YP-GSHN-2013_CAMP; YP-GSHN-2013_CAN; YP-GSHN-2013_CAO; YP-GSHN-2013_CH1; YP-GSHN-2013_CH2; YP-GSHN-2013_CHA; YP-GSHN-2013_CHI; YP-GSHN-2013_COA; YP-GSHN-2013_COL; YP-GSHN-2013_COM; YP-GSHN-2013_CSAB; YP-GSHN-2013_DIE; YP-GSHN-2013_EMI; YP-GSHN-2013_ENC; YP-GSHN-2013_ESP; YP-GSHN-2013_GLO; YP-GSHN-2013_GMI; YP-GSHN-2013_GRA; YP-GSHN-2013_GUI; YP-GSHN-2013_ILO; YP-GSHN-2013_IPA; YP-GSHN-2013_ITZ; YP-GSHN-2013_JOC; YP-GSHN-2013_JOS; YP-GSHN-2013_JUA; YP-GSHN-2013_JUC; YP-GSHN-2013_KAN; YP-GSHN-2013_LAC; YP-GSHN-2013_LCH1; YP-GSHN-2013_LCH2; YP-GSHN-2013_MAD; YP-GSHN-2013_MAG; YP-GSHN-2013_MAN; YP-GSHN-2013_MAS; YP-GSHN-2013_MET; YP-GSHN-2013_MIG; YP-GSHN-2013_MIS; YP-GSHN-2013_MU1; YP-GSHN-2013_MU2; YP-GSHN-2013_MUY; YP-GSHN-2013_NAG; YP-GSHN-2013_NEG; YP-GSHN-2013_NIC; YP-GSHN-2013_NOH; YP-GSHN-2013_OLO; YP-GSHN-2013_OQU; YP-GSHN-2013_OXO; YP-GSHN-2013_PE1; YP-GSHN-2013_PET; YP-GSHN-2013_PIN; YP-GSHN-2013_PO1; YP-GSHN-2013_PO2; YP-GSHN-2013_QUE; YP-GSHN-2013_ROS; YP-GSHN-2013_SAB; YP-GSHN-2013_SAC; YP-GSHN-2013_SAL; YP-GSHN-2013_SEN; YP-GSHN-2013_SEP; YP-GSHN-2013_SIJ; YP-GSHN-2013_SIL; YP-GSHN-2013_TEK; YP-GSHN-2013_TIC; YP-GSHN-2013_VAL; YP-GSHN-2013_VER; YP-GSHN-2013_YAL; YP-GSHN-2013_YAX; YP-GSHN-2013_YOJ; YP-GSHN-2013_YUM
    Type: Dataset
    Format: text/tab-separated-values, 1652 data points
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  • 82
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    Carbohydrates at SML stations during Alkor cruises AL510 and AL516 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Description: During two crusies in June (AL510) and September (AL516) 2018, a data set (N=76) from the sea surface microlayer (SML) was compiled in Eckernförde Bay, Germany. SML samples were collected with the glass plate technique. Reference samples from the underlying water (ULW) at an approx. depth of 20cm were collected with the help of a bottle. Total and dissolved hydrolysable amino acids, combined carbohydrates and dissolved organic carbon were analyzed to describe surfactant dynamics (based on phase-sensitive AC voltammetry). Flow cytometry provided additional information on bacteria and phytoplankton community composition. This data set resolves dynamics on short temporal (diurnal sampling ) and local scales (within an area of 50km^2).
    Keywords: air-sea gas transfer; AL510; AL510_27-1; AL510_29-1; AL510_31-1; AL510_33-1; AL510_35-1; AL510_37-1; AL510_41-1; AL510_44-1; AL510_48-1; AL510_50-1; AL510_52-1; AL510_54-1; AL510_57-1; AL510_60-1; AL510_62-1; AL510_65-1; AL510_68-1; AL510_70-1; AL510_71-1; AL510_73-1; AL510_75-1; AL510_77-1; AL510_9-1; AL516; AL516_21-1; AL516_23-1; AL516_24-1; AL516_26-1; AL516_28-1; AL516_30-1; AL516_32-1; AL516_34-1; AL516_36-1; AL516_38-1; AL516_40-1; AL516_42-1; AL516_44-1; AL516_46-1; AL516_48-1; AL516_50-1; AL516_52-1; AL516_54-1; AL516_56-1_SML; Alkor (1990); amino acids; Arabinose; Baltic Sea; carbohydrates; CTD/Rosette; CTD-RO; DATE/TIME; DOC; Event label; flow cytometry; Fucose; Galactosamine; Galactose; Galacturonic acid; Glucosamine; Glucose; Glucuronic acid; local controls; Mannose/Xylose; Rhamnose; sea surface microlayer; Station label; Surfactants
    Type: Dataset
    Format: text/tab-separated-values, 1743 data points
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  • 83
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    Radiocarbon age measurements on foraminifera from sediment core OR1-1218-C2-BC (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Description: Radiocarbon ages measured on different sample types from the marine sediment core OR1-1218-C2-BC which was retrieved from the southern South China Sea using a box corer. Onboard the ship, the core was separated into several sub-cores of which nine sub-core were analysed. Bulk samples contain 1/3 of 200 individual foraminifera (~800 µg) picked from the nine sub-cores at discrete depths (0 - 2, 6 - 8, 10 - 12, 16 - 18, 22 - 24, 28 - 30 and 32 - 34 cm.). Additional small number samples are based on 5 specimens with ten replications for two depths (6 - 8 and 36 - 37 cm) from sub-core 1. The data are used to estimate the sediment accumulation rate and the vertical extent of the sediment mixing. Additionally, the data are used to assess the intensity of the sediment mixing and the three-dimensional age-heterogeneity within the core.
    Keywords: AWI_Envi; AWI_SPACE; Foraminifera; marine; Polar Terrestrial Environmental Systems @ AWI; radiocarbon; sediment; Space-time structure of climate change @ AWI
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 84
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    Temperature, Salinity, pH, oxygen and chlorophyll measurements in the Oddewatt oyster reef in 2020 (2022)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Description: Temperature, Salinity, pH, oxygen and chlorophyll data was collected with a Hydrolab HL7 multi parameter sonde installed on an oyster table in the Oddewatt oyster reef in Königshafen, Sylt, Germany (55.028483, 8.433876). The table and sonde surface during low tide.
    Keywords: abiotic parameters; Chlorophyll a; DATE/TIME; DEPTH, water; HydroLab HL7; Königshafen; Königshafen, Sylt, Germany; Oxygen, dissolved; Oxygen saturation; OysterBed_2020; pH; Salinity; Temperature, water; Waddensea
    Type: Dataset
    Format: text/tab-separated-values, 58880 data points
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  • 85
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    Western tropical South Atlantic sea surface temperature for the Last Interglacial based on Mg/Ca in shells of Globigerinoides ruber (white) from sediment core GL-1180 (2022)
    PANGAEA
    Details
    Publication Date: 2023-04-08
    Description: The Last Interglacial (LIG, 129-116 thousand years ago) is an excellent case study for global warming scenarios and a target for proxy-model comparisons. The LIG global average sea surface temperature (SST) was ~0.5°C higher than pre-industrial (PI). Despite the global average, tropical SST compilations and model simulations show a negative anomaly in LIG SST relative to PI. Here, we present a LIG SST record from marine sediment core GL-1180 retrieved from the western tropical South Atlantic (WTSA). The SST record is based on Mg/Ca ratios of planktonic foraminifera Globigerinoides ruber (white).
    Keywords: AGE; Core; CORE; DEPTH, sediment/rock; Derived from measurements in shells of Globigerinoides ruber (white); GL1180; GL-1180; Globigerinoides ruber; Globigerinoides ruber white, Aluminium/Calcium ratio; Globigerinoides ruber white, Iron/Calcium ratio; Globigerinoides ruber white, Manganese/Calcium ratio; Last Interglacial; Mg/Ca-based sea surface temperature; Sea surface temperature; Sea surface temperature, standard error; western tropical Atlantic; western tropical South Atlantic
    Type: Dataset
    Format: text/tab-separated-values, 210 data points
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  • 86
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    Borehole temperature measurements and drilling data at MeBo200 drill sites in the Black Sea and the South China Sea (2022)
    PANGAEA
    Details
    Publication Date: 2023-04-27
    Description: Drilling data and borehole temperature data for one MARUM-MeBo200 drill site in the Black Sea (GeoB22605-1) and three MARUM-MeBo200 drill sites in the South China Sea (GeoB23213-1, GeoB23231-1, GeoB23234-1). Drilling data contain time, drilling depth and flush water flow rate, that is assumed to have an impact on the temperature distribution within the borehole. Borehole temperature data were measured at the end of the drilling operation with an autonomous borehole logging tool during trip out of the drill string. The temperature data sets contain time, depth of temperature sensor, and event descriptions that refer to the end of flush water operation as well as to the operation of the logging tool.
    Keywords: Drilling data; MeBo200
    Type: Dataset
    Format: application/zip, 8 datasets
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  • 87
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    Glacier surface velocities of Kesselwandferner, 2020/2021 (2022)
    PANGAEA
    Details
    Publication Date: 2023-04-27
    Description: Glacier surface velocities are measured on four neighbouring glaciers in the Ötztal Alps (Austria). Measurements of the annual horizontal flow velocity (Δs/a [m/a]) on Hintereisferner (HEF) were started in 1885 at stone lines (cross-profiles). Annual values for the stone lines are given as mean values from the stones at the cross-profiles. On Kesselwandferner, the annual horizontal (Δs/a [m/a]) and vertical velocities (Δv/a [m/a], positive upwards and negative downwards) are measured at ablation and accumulation stakes since 1965. On Taschachferner (TSF) and Gepatschferner (GPF), the records of annual and subseasonal horizontal flow velocities at ablation stakes were started in 2009. This data series is a continuation of: doi:10.1594/PANGAEA.896741
    Keywords: DATE/TIME; GLAC; Glacial flow, horizontal; Glacial flow, vertical; Glacial flow velocity, horizontal, annual; Kesselwandferner; Kesselwandferner, Ötztaler Alpen, Austria; KWF; LATITUDE; Line; LONGITUDE; Sampling/measurements on glacier; UTM Easting, Universal Transverse Mercator; UTM Northing, Universal Transverse Mercator; Years
    Type: Dataset
    Format: text/tab-separated-values, 64 data points
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  • 88
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    Glacier surface velocities of Hintereisferner, 2020/2021 (2022)
    PANGAEA
    Details
    Publication Date: 2023-04-27
    Description: Glacier surface velocities are measured on four neighbouring glaciers in the Ötztal Alps (Austria). Measurements of the annual horizontal flow velocity (Δs/a [m/a]) on Hintereisferner (HEF) were started in 1885 at stone lines (cross-profiles). Annual values for the stone lines are given as mean values from the stones at the cross-profiles. On Kesselwandferner, the annual horizontal (Δs/a [m/a]) and vertical velocities (Δv/a [m/a], positive upwards and negative downwards) are measured at ablation and accumulation stakes since 1965. On Taschachferner (TSF) and Gepatschferner (GPF), the records of annual and subseasonal horizontal flow velocities at ablation stakes were started in 2009. This data series is a continuation of: doi:10.1594/PANGAEA.896741
    Keywords: DATE/TIME; Glacial flow velocity, horizontal, annual; HEF; Hintereisferner; Hintereisferner, Ötztaler Alpen, Austria; LATITUDE; Line; LONGITUDE; UTM Easting, Universal Transverse Mercator; UTM Northing, Universal Transverse Mercator; Years
    Type: Dataset
    Format: text/tab-separated-values, 7 data points
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    DATA PANGAEA
  • 89
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    Glacier surface velocities of Gepatschferner and Taschachferner, 2020/2021 (2022)
    PANGAEA
    Details
    Publication Date: 2023-04-27
    Description: Glacier surface velocities are measured on four neighbouring glaciers in the Ötztal Alps (Austria). Measurements of the annual horizontal flow velocity (Δs/a [m/a]) on Hintereisferner (HEF) were started in 1885 at stone lines (cross-profiles). Annual values for the stone lines are given as mean values from the stones at the cross-profiles. On Kesselwandferner, the annual horizontal (Δs/a [m/a]) and vertical velocities (Δv/a [m/a], positive upwards and negative downwards) are measured at ablation and accumulation stakes since 1965. On Taschachferner (TSF) and Gepatschferner (GPF), the records of annual and subseasonal horizontal flow velocities at ablation stakes were started in 2009. This data series is a continuation of: doi:10.1594/PANGAEA.896741
    Keywords: Austria; DATE/TIME; Event label; Gepatschferner; GLAC; Glacial flow velocity, horizontal, annual; LATITUDE; LONGITUDE; Number; Sampling/measurements on glacier; Taschachferner_E; Tirol, Austria; UTM Easting, Universal Transverse Mercator; UTM Northing, Universal Transverse Mercator; Years
    Type: Dataset
    Format: text/tab-separated-values, 70 data points
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  • 90
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    Borehole temperature measurements at MeBo200 drill site GeoB22605-1, Black Sea (2022)
    PANGAEA
    Details
    Publication Date: 2023-04-27
    Description: Borehole temperature measurements at site GeoB22605-1 were performed with the sea floor drill rig MARUM-MeBo200 during research expedition M142 in November 2017 at the Danube Deep Sea fan in the Black Sea. A platinum resistance sensor integrated in the 1343 Slimhole Memory Acoustic Tool developed by ANTARES Datasystems GmbH was used to measure the temperature of the fluid within the borehole with 103 mm diameter. The temperature range is –20 to +80 °C, the absolute accuracy within the limits of the measuring range is about 1 °C. The resolution of the temperature measurements is about 0.003 °C. Temperatures were logged with a frequency of 0.5 Hz by a memory adapter with an integrated clock that was synchronized with GPS-time. Borehole logging was conducted during trip out of the drill string. When the drilling operation was completed and the drill string was lifted by about 3.5 m the logging string was dropped into the drill string. After landing on the drill bit the logging string together with the drill string were tripped out of borehole. The depth control system of the drill rig was used to calculate the sensor depth with an accuracy of 0.1%.
    Keywords: Black Sea; borehole logging; Borehole temperature; Center for Marine Environmental Sciences; Comment; DATE/TIME; DEPTH, sediment/rock; Depth temperature sensor; GeoB22605-1; M142; M142_06-1; MARUM; MeBo; MeBo200; Meteor (1986); Temperature, technical
    Type: Dataset
    Format: text/tab-separated-values, 20786 data points
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  • 91
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    Sedimentary hydrodynamic processes under low-oxygen conditions: implications for past, present, and future oceans (2022)
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Description: The Benguela Upwelling System is situated between 18°S and 26°S and is characterized by seasonally variable upwelling cells, elevated surface primary and secondary productivity, high sedimentary organic carbon concentrations (up to 20 %), and locally stable bottom water anoxia. Between 2014 and 2019, surface sediment cores were collected, subsampled, and analysed using geochemical and sedimentological tools. For the grain size fractionation, a combined sieve-centrifuge-filtering approach was developed to create seven fractions (〉 250, 250-200, 200-125, 125-63, 63-10, 10-2, ≤ 2.0 µm) and the density fractionation followed a centrifugation sequence to yield four fractions using sodium polytungstate (NaW) heavy liquid (≤ 1.6, 1.6-2.0, 2.0-2.5, 〉 2.5 g cm-3) (cf., Wakeham et al., 2009, https://doi.org/10.1016/j.marchem.2009.08.005). The bulk surface sediment and each fraction were analysed for TOC (%), radiocarbon age (F14C), and surface area (m2 g-1). Together with literature data, these samples are used to test and illustrate a novel hypothesis on sediment hydrodynamic properties in oxygen-depleted environments.
    Keywords: Benguela Upwelling System; density fractionation; grain size analysis; radiocarbon isotope (Fm); SLOB; Total Organic Carbon
    Type: Dataset
    Format: application/zip, 16 datasets
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  • 92
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    In situ Be-10, Al-26, and Ne-21 measurements of detrital river sediment in central Cuba (2022)
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Description: We measured the concentration of in situ Be-10 and Al-26 in quartz separated from medium (250-850 micron) detrital river sand collected from 22 watersheds in central Cuba. Samples were collected in summer 2018 from watersheds ranging in size from 2 to 730 km². Be and Al extraction was completed at the University of Vermont Community Cosmogenic Facility and accelerator mass spectrometer measurements were made at PRIME Lab. Many of the sampled basins are low slope (average 〈 1 degree) and underlain by marine rocks. Samples are from the same locations as published chemical weathering rates inferred from dissolved loads in river water (Bierman et al. 2020).
    Keywords: Caribbean; Cosmogenic nuclide; cosmogenic radionuclides; erosion; erosion rate; Tropical; tropics
    Type: Dataset
    Format: application/zip, 12 datasets
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  • 93
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    Biological soil quality of the DOK long-term field experiment from spring samples 2019 (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-27
    Keywords: Alkaline Phophatase activity in p-nitrophenol per soil dry mass; alkaline phosphatase activity; Carbon/Nitrogen ratio; composted manure; Depth, bottom/max; DEPTH, soil; Depth, top/min; Elemental analyser; farming systems; Linear regression; long−term field experiment; Metabolic quotient per soil microbial biomass-carbon; Microbial biomass as carbon per soil dry mass; Microbial biomass as nitrogen per soil dry mass; Nitrogen, soil; Organic carbon, soil; organic matter input quality; pH; Plot; Principal component 1; Principal component 2; see further details; soil basal respiration; Soil basal respiration per soil dry mass; soil microbial biomass; Soil microbial biomass per soil organic carbon; soil organic carbon; Soil organic carbon, flux; SOILS; Soil sample; Switzerland; Therwil_DOK_trial
    Type: Dataset
    Format: text/tab-separated-values, 1536 data points
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  • 94
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    Biannual soil organic carbon of the DOK long-term field experiment (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-27
    Keywords: alkaline phosphatase activity; composted manure; Depth, bottom/max; DEPTH, soil; Depth, top/min; farming systems; long−term field experiment; Organic carbon, soil; organic matter input quality; Plot; see further details; soil basal respiration; soil microbial biomass; soil organic carbon; SOILS; Soil sample; Switzerland; Therwil_DOK_trial
    Type: Dataset
    Format: text/tab-separated-values, 2165 data points
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  • 95
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    Whole rock major and chalcophile element composition as well as measurments of standard materials from samples at the Niuatahi caldera (Table S4) (2022)
    PANGAEA
    Details
    Publication Date: 2023-04-24
    Keywords: #436; #439; #440; Aluminium oxide; Antimony; Arsenic; Barium; Bismuth; Cadmium; Calcium oxide; Cobalt; Copper; Elevation of event; Event label; hydrothermal deep sea vents; ICP-MS; in-situ mineral geochemistry; Iron oxide, total; Latitude of event; Lead; Longitude of event; Magnesium oxide; Manganese oxide; Material; Molybdenum; Nickel; Pb isotopes; Phosphorus pentoxide; Potassium oxide; Remote operated vehicle; ROV; Sample code/label; Selenium; Silicon dioxide; SO263; SO263_069; SO263_071; SO263_082; SO263_097; SO263_103; Sodium oxide; Sonne_2; Sulfur isotopes; Television-Grab; Tellurium; Thallium; Titanium dioxide; Tonga Rift; TVG; X-ray fluorescence (XRF); Zinc
    Type: Dataset
    Format: text/tab-separated-values, 112 data points
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  • 96
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    Water chemistry of a Lagrangian sampling of Inland Elbe 2020 (MOSES Hydrological Extremes) (2022)
    PANGAEA
    Details
    Publication Date: 2023-04-22
    Description: The MOSES test campaign ELBE 2020 includes activities along the middle reaches to the tidal Elbe river and the German Bight. The inland Elbe river part of the campaign covers physico-chemical parameters from various sites along the Elbe River and its main tributaries. The sampling was conducted in a Langrangian way according to travel time, particularly between Aug 04 to Aug 12. Discharge in Magdeburg was 241 m³/s which is about mean low discharge (231 m³/s). Physico-chemical parameters as well as nutrients were sampled using the research vessel ALBIS from Schmilka (km 4, German border) to Geestacht (km 585, close to Hamburg). The targets were water quality measurement by multiparameter probes and chemical analyses, the detection of phytoplankton growth and decrease of dissolved nutrients along the river.
    Keywords: 2020ELBE_el00400l; 2020ELBE_el00400m; 2020ELBE_el00400r; 2020ELBE_el05450l; 2020ELBE_el05450m; 2020ELBE_el05450r; 2020ELBE_el08800l; 2020ELBE_el08800m; 2020ELBE_el08800r; 2020ELBE_el10700l; 2020ELBE_el10700m; 2020ELBE_el10700r; 2020ELBE_el15450l; 2020ELBE_el15450m; 2020ELBE_el15450r; 2020ELBE_el17260l-MST; 2020ELBE_el17260m; 2020ELBE_el17260r; 2020ELBE_el19900muend; 2020ELBE_el25800l; 2020ELBE_el25800m; 2020ELBE_el25800r; 2020ELBE_el25900muend; 2020ELBE_el28700l; 2020ELBE_el28700m; 2020ELBE_el28700r; 2020ELBE_el29070muend; 2020ELBE_el31800l; 2020ELBE_el31800m; 2020ELBE_el31800r; 2020ELBE_el32653l; 2020ELBE_el32653m; 2020ELBE_el32653r; 2020ELBE_el35100l; 2020ELBE_el35100m; 2020ELBE_el35100r; 2020ELBE_el38800l; 2020ELBE_el38800m; 2020ELBE_el38800r; 2020ELBE_el42225l; 2020ELBE_el42225m; 2020ELBE_el42225r; 2020ELBE_el43800muend; 2020ELBE_el45490l; 2020ELBE_el45490m; 2020ELBE_el45490r; 2020ELBE_el47500l; 2020ELBE_el47500m; 2020ELBE_el47500r; 2020ELBE_el50600l; 2020ELBE_el50600m; 2020ELBE_el50600r; 2020ELBE_el53600l; 2020ELBE_el53600m; 2020ELBE_el53600r; 2020ELBE_el57040l; 2020ELBE_el57040m; 2020ELBE_el57040r; 2020ELBE_el58550l; 2020ELBE_el58550m; 2020ELBE_el58550r; Ammonium-nitrogen; Area/locality; Breitenhagen links; Breitenhagen mitte; Breitenhagen rechts; Carbon, inorganic, dissolved; Carbon, inorganic, total; Carbon, organic, dissolved; Carbon, organic, particulate; Carbon analyzer; CFA; Chlorophyll a; Conductivity, electrical; Continuous Flow Analysis; Date/Time of event; DIMA-IC; Distance; Doemitz, li; Doemitz, re; Dommitzsch Mitte; Dommitzsch rechts; drought; Elbe; Elbe Dresden CarolaBruecke links; Elbe Dresden CarolaBruecke Mitte; Elbe Dresden CarolaBruecke rechts; Elbe km 388.0 Tangermuende links; Elbe km 388.0 Tangermuende rechts; Elbe km 506, Doemitz, mitte; Elbe MD links, km 318, MD Westerhuesen; Elbe Riesa Bruecke links; Elbe Riesa Bruecke Mitte; Elbe Riesa Bruecke rechts; Elbe Roެau mitte, km 258; Elbe Torgau Bruecke links; Elbe Torgau Bruecke Mitte; Elbe Torgau Bruecke rechts; Event label; Faehre Werben Elbe km 422,25 links; Faehre Werben Elbe km 422,25 Mitte; Faehre Werben Elbe km 422,25 rechts; Geestacht links; Geestacht rechts; Geesthacht; Havel Muendung; HPLCO; hydrological extremes; Lauenburg links; Lauenburg Mitte; Lauenburg rechts; Magdeburg mitte; Magdeburg Neue StromBruecke links; Magdeburg Neue StromBruecke Mitte; Magdeburg Neue StromBruecke rechts; Magdeburg rechts km 318; Messstation Dommitzsch, links Strom-km 172,6; Modular Observation Solutions for Earth Systems; MOSES; Mulde Muendung; MULT; Multiple investigations; Neu Darchau links; Neu Darchau mitte; Neu Darchau rechts; Nitrate-nitrogen; Nitrite-nitrogen; Nitrogen, organic, particulate; nutrients; Oxygen, dissolved; pH; Phosphorus, reactive soluble; Phosphorus, total; Photometry; Phytoplankton; Pigments analysis by HPLC (UV and FLD); River Elbe; Rogaetz links; Rogaetz mitte; Rogaetz rechts; Roެau links; Roެau rechts; AutoBruecke - Hochwasserprobenahme; Saale Muendung Elbekilometer 290,7; Schmilka links; Schmilka mitte; Schmilka rechts; Schnackenburg links; Schnackenburg mitte; Schnackenburg rechts; Schwarze Elster Muendung; Silicon; Tangermuende, Mitte km 388,0; Temperature, water; Turbidity (Nephelometric turbidity unit); Wittenberge, links; Wittenberge, mitte; Wittenberge, rechts; YSI 610 Handheld Multiparameter Instrument; Zehren links; Zehren mitte; Zehren rechts
    Type: Dataset
    Format: text/tab-separated-values, 1339 data points
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  • 97
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    Soil organic carbon over 42 years of organic and conventional farming and biological soil quality in year 42 of the DOK long-term field experiment (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-27
    Description: The DOK trial in Therwil (CH), compares bioorganic (BIOORG), biodynamic (BIODYN) and integrated (CONFYM) farming systems at two farmyard manure intensities corresponding to 0.7 and 1.4 livestock units per hectare with a purely mineral fertilized system (CONMIN) and an unfertilized control (NOFERT) since 1978. The treatments differ in plant protection and receive farming system specific organic matter inputs differing in rate and quality. SOC contents increased in BIODYN 1.4, less in BIOORG 1.4, and were stable in CONFYM 1.4. Enhanced biological soil quality under organic and particularly biodynamic management highlights the immanent relation between soil biology and SOC changes. Systems fertilized with manure of 0.7 livestock units and CONMIN lost SOC, but loss was highest in NOFERT. The impact on soil quality was only detectable after 20 years of continuous management. We conclude that recycling of the manure from 1.4 livestock units per hectare allows to maintain SOC levels and that the investment in producing manure compost from the same number of livestock is needed to enhance SOC levels and improve biological soil quality. The data come from 96 field plots (8 farming systems, 3 subplots with crops from a temporally shifted 7-year crop rotation, 4 replicates). Soil organic carbon was analysed in archived samples from 0-20 cm every second year between 1982 and 2018. Soil quality as assessed by pH, SOC, Ntot, soil microbial biomass C and N, soil basal respiration and alkaline phosphatase activity was measured in the 42nd year of the trial in 0-20 cm samples taken in spring 2019.
    Keywords: alkaline phosphatase activity; composted manure; farming systems; long−term field experiment; organic matter input quality; soil basal respiration; soil microbial biomass; soil organic carbon
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 98
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    Radiolarian based subsurface temperatures in sediment core MD11-3353 (360kyrs record) (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-30
    Description: In the Southern Ocean (SO), climate-driven latitudinal migrations of the Antarctic Circumpolar Current (ACC) frontal system impact large-scale ocean circulation and primary productivity. Latitudinal migrations may not have been identical in all SO basins due to the presence or absence of regional bathymetric obstacles. The Antarctic Polar Front (APF), defined by the 3–5 ◦C surface temperature range and the 2 ◦C subsurface temperature minimum at 200 m, is particularly important for nutrient redistribution and biodiversity, influencing the soft tissue carbon pump in the modern SO. However, previous assessments of its migrations in the past, mostly based on a single metric or indirect observations, were not always robust. Here, we combine a new proxy for subsurface temperature (sub-ST) reconstructions based on radiolarian assemblages (sub-STrad), with relative abundance variations of key radiolarian species, and sea-surface temperatures (SST) reconstructions, based on diatom assemblages (SSTdiat), to refine estimations of the past mean APF locations in the Kerguelen Plateau (KP) region. Data from three sediment cores on a south (55◦S) to north (47◦S) transect are used to trace the mean APF locations for three climate states, glacials, peak-interglacials and mild-interglacials. Our results suggest that the APF, presently located south of Kerguelen Islands, shifted by 6–7 degrees of latitude and was located north of the KP during all glacial periods of the last 360 kyrs. This suggests that the ACC major flow interacted less with the bottom topography relative to its modern counterpart, probably resulting in less mixing of the water column over and in the lee of the KP. We propose that this process participated in the isolation of Antarctic surface waters (AASW) and in the reduction of macro-nutrient supply, thus resulting in lower regional productivity. During the warmer-than-present early interglacial periods, the APF probably migrated south by ~5 degrees of latitude relative to its modern position, to pass through the Fawn Trough. Contrary to glacial periods, the APF was forced in an “S” shape while the ACC main flow was constrained against the northern tip of the KP. In this configuration, a stronger interaction between the ACC, its associated fronts, and topography is expected, resulting in more mixing of the water column over and east of the KP. Congruently, siliceous productivity was probably restrained to latitudes south of the Fawn Trough.
    Keywords: AGE; Calculated from radiolarians; CALYPSO2; Calypso Corer II; DEPTH, sediment/rock; INDIEN SUD 2; Kerguelen; Marion Dufresne (1995); MD11-3353; MD185; Radiolarian; Sea sub-surface temperature; subsurface temperatures; transfer function
    Type: Dataset
    Format: text/tab-separated-values, 470 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 99
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    Wet chemical surface ozone measurements during Walther Herwig transit cruise to Antarctica in 1977 (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Description: This cuise was the transit to the 2. German Antarctic Expedition 1977/1978 with Walter Herwig II.
    Keywords: CT; DATE/TIME; Electrochemical concentration cell (ECC) (Atmannspacher 1971); LATITUDE; LONGITUDE; Ozone; Underway cruise track measurements; Walther Herwig II; WH030-transit; WH030-transit-track
    Type: Dataset
    Format: text/tab-separated-values, 500 data points
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    DATA PANGAEA
  • 100
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    Wet chemical surface ozone measurements during Walter Herwig cruises in 1980 and 1981 (WH044 and transits) (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Description: Building on the experiences and results of the previous two Antarctic voyages with FFS "Walther Herwig" 1975/76 and 1977/78, in the spring of 1981 the third voyage of this ship to the Southern Ocean took place. The transit to and from Antarctica are included here as well. After leaving Montevideo on January 20, 1981 FFS "Walther Herwig" took part in the international FIBEX program.
    Keywords: CT; DATE/TIME; Electrochemical concentration cell (ECC) (Atmannspacher 1971); LATITUDE; LONGITUDE; Ozone; Underway cruise track measurements; Walther Herwig II; WH044; WH044-track; WH044-transit-start; WH89, FIBEX, 2 legs
    Type: Dataset
    Format: text/tab-separated-values, 744 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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