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  • 1
    facet.materialart.
    Unknown
    Organic matter characteristics using lipid biomarker analysis of a rapidly eroding permafrost cliff (2021)
    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.
    Keywords: Biomarker; CACOON; Carbon; Changing Arctic Carbon cycle in the cOastal Ocean Near-shore; erosion; n-alkane; n-fatty acids; Siberia; Yedoma
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Organic matter biogeochemistry using lipid biomarker analysis of a rapidly eroding permafrost cliff (2021)
    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.
    Keywords: AGE; AWI Arctic Land Expedition; Biomarker; CACOON; Carbon; Carbon, organic, total; Carbon/Nitrogen ratio; Carbon Preference Index, n-Alkanes; Changing Arctic Carbon cycle in the cOastal Ocean Near-shore; erosion; Event label; Height above river level; Higher plant n-fatty acids, per unit sediment mass; Lithologic unit/sequence; n-alkane; n-Alkane, average chain length; n-Alkanes, long-chain, per unit mass total organic carbon; n-Alkanes, long-chain per unit sediment mass; n-Alkanes, short-chain, per unit mass total organic carbon; n-Alkanes, short-chain per unit sediment mass; n-fatty acids; n-fatty acids, C21-C23, per unit mass total organic carbon; n-fatty acids, C21-C23, per unit sediment mass; n-fatty acids, long-chain, per unit mass total organic carbon; n-fatty acids, long-chain per unit sediment mass; n-fatty acids, per unit mass total organic carbon; n-fatty acids, per unit sediment mass; n-fatty acids, short-chain, per unit mass total organic carbon; n-fatty acids, short-chain per unit sediment mass; Nitrogen, total; PERM; Ratio; RU-Land_2018_Lena_Sobo-Sise; Sample ID; Sampling permafrost; Siberia; SOB18-01; SOB18-03; SOB18-06; Sobo-Sise 2018; Sobo-Sise Island; Sum n-alkanes C14-C35, per unit mass total organic carbon; Sum n-alkanes C14-C35, per unit sediment mass; Yedoma; δ13C, organic matter
    Type: Dataset
    Format: text/tab-separated-values, 545 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
    facet.materialart.
    Unknown
    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.
    Keywords: 10-methyl-fatty acid C14:0, per unit mass total organic carbon; 10-methyl-fatty acid C16:0, per unit mass total organic carbon; 10-methyl-fatty acid C17:0, per unit mass total organic carbon; 10-methyl-fatty acid C18:0, per unit mass total organic carbon; 12-methyl-fatty acid C16:0, per unit mass total organic carbon; 12-methyl-fatty acid C18:0, per unit mass total organic carbon; 3-hydroxyl-fatty acid C6:0, per unit mass total organic carbon; 3-hydroxyl-fatty acid C7:0, per unit mass total organic carbon; 3-hydroxyl-fatty acid C8:0, per unit mass total organic carbon; anteiso-fatty acid C11:0, per unit mass total organic carbon; anteiso-fatty acid C12:0, per unit mass total organic carbon; anteiso-fatty acid C13:0, per unit mass total organic carbon; anteiso-fatty acid C15:0, per unit mass total organic carbon; anteiso-fatty acid C17:0, per unit mass total organic carbon; anteiso-fatty acid C17:1, per unit mass total organic carbon; AWI Arctic Land Expedition; Biomarker; CACOON; Carbon; Changing Arctic Carbon cycle in the cOastal Ocean Near-shore; cyclo-fatty acid C17, per unit mass total organic carbon; cyclo-fatty acid C19, per unit mass total organic carbon; erosion; Event label; fatty acid C16:1w5, per unit mass total organic carbon; fatty acid C16:1w7cis, per unit mass total organic carbon; fatty acid C16:1w7trans, per unit mass total organic carbon; fatty acid C18:1w7cis, per unit mass total organic carbon; fatty acid C18:1w7trans, per unit mass total organic carbon; fatty acid C18:1w9, per unit mass total organic carbon; fatty acid C18:2w6,9, per unit mass total organic carbon; Height above river level; iso-fatty acid C10:0, per unit mass total organic carbon; iso-fatty acid C11:0, per unit mass total organic carbon; iso-fatty acid C13:0, per unit mass total organic carbon; iso-fatty acid C14:0, per unit mass total organic carbon; iso-fatty acid C15:0, per unit mass total organic carbon; iso-fatty acid C16:0, per unit mass total organic carbon; iso-fatty acid C17:0, per unit mass total organic carbon; iso-fatty acid C17:1, per unit mass total organic carbon; iso-fatty acid C18:0, per unit mass total organic carbon; iso-fatty acid C19:0, per unit mass total organic carbon; methyl-fatty acid C16:0, per unit mass total organic carbon; methyl-fatty acid C17:0, per unit mass total organic carbon; n-alkane; n-fatty acid C10:0, per unit mass total organic carbon; n-fatty acid C11:0, per unit mass total organic carbon; n-fatty acid C12:0, per unit mass total organic carbon; n-fatty acid C13:0, per unit mass total organic carbon; n-fatty acid C14:0, per unit mass total organic carbon; n-fatty acid C15:0, per unit mass total organic carbon; n-fatty acid C16:0, per unit mass total organic carbon; n-fatty acid C17:0, per unit mass total organic carbon; n-fatty acid C17:1, per unit mass total organic carbon; n-fatty acid C18:0, per unit mass total organic carbon; n-fatty acid C18:3, per unit mass total organic carbon; n-fatty acid C19:0, per unit mass total organic carbon; n-fatty acid C19:1, per unit mass total organic carbon; n-fatty acid C20:0, per unit mass total organic carbon; n-fatty acid C20:1, per unit mass total organic carbon; n-fatty acid C21:0, per unit mass total organic carbon; n-fatty acid C22:0, per unit mass total organic carbon; n-fatty acid C23:0, per unit mass total organic carbon; n-fatty acid C24:0, per unit mass total organic carbon; n-fatty acid C24:1, per unit mass total organic carbon; n-fatty acid C25:0, per unit mass total organic carbon; n-fatty acid C26:0, per unit mass total organic carbon; n-fatty acid C27:0, per unit mass total organic carbon; n-fatty acid C28:0, per unit mass total organic carbon; n-fatty acid C29:0, per unit mass total organic carbon; n-fatty acid C30:0, per unit mass total organic carbon; n-fatty acid C32:0, per unit mass total organic carbon; n-fatty acid C8:0, per unit mass total organic carbon; n-fatty acid C9:0, per unit mass total organic carbon; n-fatty acids; PERM; Phytanoic acid, per unit mass total organic carbon; RU-Land_2018_Lena_Sobo-Sise; Sample ID; Sampling permafrost; Siberia; SOB18-01; SOB18-03; SOB18-06; Sobo-Sise 2018; Sobo-Sise Island; Standard deviation; Stigmastenone, per unit mass total organic carbon; Yedoma
    Type: Dataset
    Format: text/tab-separated-values, 923 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    n-Alkane composition of organic matter in a rapidly eroding permafrost cliff (2021)
    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.
    Keywords: AWI Arctic Land Expedition; Biomarker; CACOON; Carbon; Changing Arctic Carbon cycle in the cOastal Ocean Near-shore; erosion; Event label; Height above river level; n-alkane; n-Alkane C14, per unit mass total organic carbon; n-Alkane C14, per unit sediment mass; n-Alkane C15, per unit mass total organic carbon; n-Alkane C15, per unit sediment mass; n-Alkane C16, per unit mass total organic carbon; n-Alkane C16, per unit sediment mass; n-Alkane C17, per unit mass total organic carbon; n-Alkane C17, per unit sediment mass; n-Alkane C18, per unit mass total organic carbon; n-Alkane C18, per unit sediment mass; n-Alkane C19, per unit mass total organic carbon; n-Alkane C19, per unit sediment mass; n-Alkane C20, per unit mass total organic carbon; n-Alkane C20, per unit sediment mass; n-Alkane C21, per unit mass total organic carbon; n-Alkane C21, per unit sediment mass; n-Alkane C22, per unit mass total organic carbon; n-Alkane C22, per unit sediment mass; n-Alkane C23, per unit mass total organic carbon; n-Alkane C23, per unit sediment mass; n-Alkane C24, per unit mass total organic carbon; n-Alkane C24, per unit sediment mass; n-Alkane C25, per unit mass total organic carbon; n-Alkane C25, per unit sediment mass; n-Alkane C26, per unit mass total organic carbon; n-Alkane C26, per unit sediment mass; n-Alkane C27, per unit mass total organic carbon; n-Alkane C27, per unit sediment mass; n-Alkane C28, per unit mass total organic carbon; n-Alkane C28, per unit sediment mass; n-Alkane C29, per unit mass total organic carbon; n-Alkane C29, per unit sediment mass; n-Alkane C30, per unit mass total organic carbon; n-Alkane C30, per unit sediment mass; n-Alkane C31, per unit mass total organic carbon; n-Alkane C31, per unit sediment mass; n-Alkane C32, per unit mass total organic carbon; n-Alkane C32, per unit sediment mass; n-Alkane C33, per unit mass total organic carbon; n-Alkane C33, per unit sediment mass; n-Alkane C34, per unit mass total organic carbon; n-Alkane C34, per unit sediment mass; n-Alkane C35, per unit mass total organic carbon; n-Alkane C35, per unit sediment mass; n-fatty acids; PERM; RU-Land_2018_Lena_Sobo-Sise; Sample ID; Sampling permafrost; Siberia; SOB18-01; SOB18-03; SOB18-06; Sobo-Sise 2018; Sobo-Sise Island; Yedoma
    Type: Dataset
    Format: text/tab-separated-values, 1294 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 5
    facet.materialart.
    Unknown
    n-Fatty acid composition per sediment mass in a rapidly eroding permafrost cliff (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-21
    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.
    Keywords: 10-methyl-fatty acid C14:0; 10-methyl-fatty acid C16:0; 10-methyl-fatty acid C17:0; 10-methyl-fatty acid C18:0; 12-methyl-fatty acid C16:0; 12-methyl-fatty acid C18:0; 3-hydroxyl-fatty acid C6:0; 3-hydroxyl-fatty acid C7:0; 3-hydroxyl-fatty acid C8:0; anteiso-fatty acid C11:0; anteiso-fatty acid C12:0; anteiso-fatty acid C13:0; anteiso-fatty acid C15:0; anteiso-fatty acid C17:0; anteiso-fatty acid C17:1; AWI Arctic Land Expedition; Biomarker; CACOON; Carbon; Changing Arctic Carbon cycle in the cOastal Ocean Near-shore; cyclo-fatty acid C17; cyclo-fatty acid C19; erosion; Event label; fatty acid C16:1w5; fatty acid C16:1w7cis; fatty acid C16:1w7trans; fatty acid C18:1w7cis; fatty acid C18:1w7trans; fatty acid C18:1w9; fatty acid C18:2w6,9; Height above river level; iso-fatty acid C10:0; iso-fatty acid C11:0; iso-fatty acid C13:0; iso-fatty acid C14:0; iso-fatty acid C15:0; iso-fatty acid C16:0; iso-fatty acid C17:0; iso-fatty acid C17:1; iso-fatty acid C18:0; iso-fatty acid C19:0; methyl-fatty acid C16:0; methyl-fatty acid C17:0; n-alkane; n-fatty acid C10:0; n-fatty acid C11:0; n-fatty acid C12:0; n-fatty acid C13:0; n-fatty acid C14:0; n-fatty acid C15:0; n-fatty acid C16:0; n-fatty acid C17:0; n-fatty acid C17:1; n-fatty acid C18:0; n-fatty acid C18:3; n-fatty acid C19:0; n-fatty acid C19:1; n-fatty acid C20:0; n-fatty acid C20:1; n-fatty acid C21:0; n-fatty acid C22:0; n-fatty acid C23:0; n-fatty acid C24:0; n-fatty acid C24:1; n-fatty acid C25:0; n-fatty acid C26:0; n-fatty acid C27:0; n-fatty acid C28:0; n-fatty acid C29:0; n-fatty acid C30:0; n-fatty acid C32:0; n-fatty acid C8:0; n-fatty acid C9:0; n-fatty acids; PERM; Phytanoic acid; RU-Land_2018_Lena_Sobo-Sise; Sample ID; Sampling permafrost; Siberia; SOB18-01; SOB18-03; SOB18-06; Sobo-Sise 2018; Sobo-Sise Island; Standard deviation; Stigmastenone; Yedoma
    Type: Dataset
    Format: text/tab-separated-values, 923 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    Dissolved and Particulate Organic Carbon and its isotopic composition in the Lena Delta in winter 2019 and in summer 2019, 2017 and 2016 (2023)
    PANGAEA
    Details
    Publication Date: 2023-09-27
    Description: Dissolved and particulate Organic Carbon (DOC and POC) and their isotopic composition were measured in water samples from the Lena Delta (Sardakhskaya branch). Samples were taken in winter (April) and summer (August) 2019 during the CACOON expedition (Fuchs et al., 2021a, b and 2022) and in the summer 2017 and 2016 during previous Lena Delta sampling campaigns. Water was filtered through pre-combusted (4.5 hours, 450 °C) and pre-weighed glass fiber filters (GF/F Whatman, 0.75 µm membrane, Ø 2.5 cm) for DOC analyses, filters with rest suspended matter on it were used to analyse POC. δ13C of DOC and POC was measured by Sercon 20-20 isotope ratio mass spectrometer coupled to an Automated Nitrogen Carbon Analyzer, ∆14C of DOC and POC by accelerator mass spectrometer achieved on a Mini Carbon Dating System. Our aim was to highlight the variability in quantity and composition between seasons and suggest that permafrost deposits are degrading year around, impacting the release of organic matter through the Lena Delta.
    Keywords: 13C-DOC; 13C-POC; 14C-DOC; 14C-POC; Accelerator mass spectrometry, Ionplus, Mini Carbon Dating System (MiCaDaS AWI); AWI Arctic Land Expedition; CAC19-01; CAC19-02; CAC19-03; CAC19-04; CAC19-23; CAC19-A; CAC19-B; CAC19-C; CAC19-D; CAC19-E; CAC19-F; CAC19-G; CAC19-H; CACOON; Carbon, organic, dissolved; Carbon, organic, particulate; Changing Arctic Carbon cycle in the cOastal Ocean Near-shore; Continuous flow isotope ratio mass spectrometer, Sercon, 20-20; coupled with Automated nitrogen carbon analyzer; DATE/TIME; DEPTH, water; DOC; Event label; L16-06; L16-07; L16-08; L16-14; L16-15; L16-16; L17-07; L17-08; L17-09; L17-18; L17-19; L17-20; Laptev Sea, Siberia; LATITUDE; LEN19-S-01; LEN19-S-02; LEN19-S-03; LEN19-S-04; LEN19-S-05; LEN19-S-06; LEN19-S-07; LEN19-S-08; LEN19-S-09; LEN19-S-78; LEN19-S-89; Lena2016_spring, Lena2016_summer; Lena2017; Lena 2019; Lena Delta; Lena Delta, Siberia; LONGITUDE; MULT; Multiple investigations; POC; RU-Land_2016_Lena; RU-Land_2017_Lena; RU-Land_2019_Lena; Sample ID; Water sample; WS; Δ14C, dissolved organic carbon; Δ14C, particulate organic carbon; δ13C, dissolved organic carbon; δ13C, particulate organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 494 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 7
    facet.materialart.
    Unknown
    Total suspended matter, particulate organic carbon and its isotopic composition in the Lena River and its Delta (2022)
    PANGAEA
    Details
    Publication Date: 2023-09-27
    Description: Total Suspended Matter (TSM), Particulate Organic Carbon (POC) and its isotopic composition were measured in water samples from the Lena River and its Delta (Sardakhskaya branch). Samples were taken in summer 2019 during the CACOON expedition (Fuchs et al., 2021a, b and 2022) along ~ 1600 km transect from Yakutsk downstream to the Lena Delta disembogue into the Laptev Sea. Water was filtered through pre-combusted (4.5 hours, 450 °C) and pre-weighed glass fiber filters (GF/F Whatman, 0.75 µm membrane, Ø 2.5 cm) for TSM content (difference in weights between dried filters with TSM and pre-weighed empty filters), POC concentration and δ13C-POC (Sercon 20-20 isotope ratio mass spectrometer coupled to an Automated Nitrogen Carbon Analyzer), ∆14C-POC analysis (accelerator mass spectrometer achieved on a Mini Carbon Dating System) and relative OC content in TSM (calculated by dividing the sample POC content by the TSM content). Our aim was to characterize POC along the Lena River over a transect from upper reaches of the Lena River north to the Lena delta in order to decipher the distribution, main sources, and transformation of POC on its way from the permafrost catchment to the Arctic Ocean.
    Keywords: 13C-POC; 14C-POC; Accelerator mass spectrometry, Ionplus, Mini Carbon Dating System (MiCaDaS AWI); AWI Arctic Land Expedition; CACOON; Carbon, organic, fraction; Carbon, organic, particulate; Changing Arctic Carbon cycle in the cOastal Ocean Near-shore; Continuous flow isotope ratio mass spectrometer, Sercon, 20-20; coupled with Automated nitrogen carbon analyzer; DATE/TIME; DEPTH, water; Event label; LATITUDE; LEN19-S-01; LEN19-S-02; LEN19-S-03; LEN19-S-04; LEN19-S-05; LEN19-S-06; LEN19-S-07; LEN19-S-08; LEN19-S-09; LEN19-S-78; LEN19-S-89; Lena 2019; Lena Delta; Lena Delta, Siberia; Lena River; LONGITUDE; MULT; Multiple investigations; POC; RU-Land_2019_Lena; Sardakhskaya; Suspended matter, total; TSM; Water sample; WL19-1; WL19-2; WL19-3; WL19-4; WL19-5; WL19-6; WL19-7; WL19-8; WL19-9; WS; Δ14C, particulate organic carbon; δ13C, particulate organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 155 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 8
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    (Table S1) Total organic carbon and concentration of C-35 aminoBHPs in ODP Site 175-1075 Congo Fan sediments (2014)
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    Details
    Publication Date: 2024-02-02
    Keywords: 175-1075; Aminopentol, per unit mass total organic carbon; Aminopentol isomer, per unit mass total organic carbon; Aminotetrol, per unit mass total organic carbon; Aminotriol, per unit mass total organic carbon; Benguela Current, South Atlantic Ocean; Carbon, organic, total; COMPCORE; Composite Core; Depth, composite; DEPTH, sediment/rock; Joides Resolution; Leg175; Ocean Drilling Program; ODP
    Type: Dataset
    Format: text/tab-separated-values, 630 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 9
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    (Table 1) Selected samples from ODP Site 175-1075 subjected to compound specific stable carbon isotope analysis (2014)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 175-1075; AGE; Benguela Current, South Atlantic Ocean; C30-Hopanol; C30-Hopanol, δ13C; C31-Hopanol; C31-Hopanol, δ13C; C32-Hopanol; C32-Hopanol, δ13C; COMPCORE; Composite Core; Gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS); Joides Resolution; Leg175; Ocean Drilling Program; ODP; Sample code/label; Standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 67 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 10
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    (Table S2) Total organic carbon and concentration of C-35 aminoBHPs in Congo soils, wetland and Estuary sediments (2014)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: Aminopentol, per unit mass total organic carbon; Aminopentol isomer, per unit mass total organic carbon; Aminotetrol, per unit mass total organic carbon; Aminotriol, per unit mass total organic carbon; Anker24; Area/locality; Carbon, organic, total; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Elevation of event; Event label; Grab; GRAB; Latitude of event; Longitude of event; MARUM; Sample comment
    Type: Dataset
    Format: text/tab-separated-values, 174 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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