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  • 2015-2019  (12)
  • 2016  (12)
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  • 2015-2019  (12)
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  • 1
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    Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES (2016)
    Royal Society of London
    In:  Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 374 (2081). p. 20160076.
    Details
    Publication Date: 2020-06-12
    Description: Continental shelves and shelf seas play a central role in the global carbon cycle. However, their importance with respect to trace element and isotope (TEI) inputs to ocean basins is less well understood. Here, we present major findings on shelf TEI biogeochemistry from the GEOTRACES programme as well as a proof of concept for a new method to estimate shelf TEI fluxes. The case studies focus on advances in our understanding of TEI cycling in the Arctic, transformations within a major river estuary (Amazon), shelf sediment micronutrient fluxes and basin-scale estimates of submarine groundwater discharge. The proposed shelf flux tracer is 228-radium (T1/2 = 5.75 yr), which is continuously supplied to the shelf from coastal aquifers, sediment porewater exchange and rivers. Model-derived shelf 228Ra fluxes are combined with TEI/ 228Ra ratios to quantify ocean TEI fluxes from the western North Atlantic margin. The results from this new approach agree well with previous estimates for shelf Co, Fe, Mn and Zn inputs and exceed published estimates of atmospheric deposition by factors of approximately 3–23. Lastly, recommendations are made for additional GEOTRACES process studies and coastal margin-focused section cruises that will help refine the model and provide better insight on the mechanisms driving shelf-derived TEI fluxes to the ocean.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1098/rsta.2016.0076
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Dissolved organic sulfur in solid-phase extracts of water samples obtained during POLARSTERN cruise ANT-XXV (PS73) (2016)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Keywords: Age, 14C; Age, dated; ANT-XXV/1; ANT-XXV/2; AWI_EcolChem; AWI_MarGeoChem; Canarias Sea; Carbon, organic, dissolved; Carbon, organic, dissolved, extracted; Celtic Sea; Center for Marine Environmental Sciences; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; Ecological Chemistry @ AWI; English Channel; Event label; LATITUDE; LONGITUDE; Marine Geochemistry @ AWI; MARUM; Nitrogen, organic, dissolved, extracted; Polarstern; PS73; PS73/002-1; PS73/004-1; PS73/006-1; PS73/006-3; PS73/008-1; PS73/010-2; PS73/013-1; PS73/015-1; PS73/015-2; PS73/017-2; PS73/019-1; PS73/022-1; PS73/024-1; PS73/026-1; PS73/026-2; PS73/028-1; PS73/030-1; PS73/032-1; PS73/032-4; PS73/034-1; PS73/036-1; PS73/038-1; PS73/038-2; PS73/042-1; PS73/044-1; PS73/047-1; PS73/051-1; PS73/054-1; PS73/056-1; PS73/062-1; PS73/064-1; PS73/069-2; PS73/070-1; PS73/071-1; PS73/072-1; PS73/073-1; PS73/074-1; PS73/S10; PS73/S11; PS73/S13; PS73/S15; PS73/S16; PS73/S17; PS73/S19; PS73/S2; PS73/S21; PS73/S24; PS73/S26; PS73/S29; PS73/S3; PS73/S30; PS73/S32; PS73/S34; PS73/S36; PS73/S38; PS73/S41; PS73/S43; PS73/S44; PS73/S45; PS73/S46; PS73/S47; PS73/S49; PS73/S5; PS73/S50; PS73/S52; PS73/S55; PS73/S57; PS73/S58; PS73/S60; PS73/S66; PS73/S67; PS73/S68; PS73/S69; PS73/S7; PS73/S70; PS73/S71; PS73/SW1; PS73/SW10; PS73/SW11; PS73/SW12; PS73/SW13; PS73/SW14; PS73/SW15; PS73/SW16; PS73/SW17; PS73/SW18; PS73/SW19; PS73/SW2; PS73/SW3; PS73/SW4; PS73/SW5; PS73/SW6; PS73/SW7; PS73/SW8; PS73/SW9; RAMSES; RAMSES hyperspectral radiometer; Solid phase extraction (SPE) with PPL sorbent (after Flerus et al. 2012); South Atlantic Ocean; Station label; Sulfur, organic, dissolved, extracted; Sulfur, organic, dissolved/Nitrogen, organic, dissolved ratio; Surface water sample; SWS; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 1234 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Molecular characterization of sulfur-containing compounds in solid-phase extracts of water samples obtained during POLARSTERN cruise ANT-XXV (PS73) (2016)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Keywords: ANT-XXV/1; ANT-XXV/2; Area/locality; AWI_EcolChem; AWI_MarGeoChem; Canarias Sea; Celtic Sea; Center for Marine Environmental Sciences; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; Double bond equivalent; Ecological Chemistry @ AWI; English Channel; Event label; Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS); Hydrogen/Carbon ratio; LATITUDE; LONGITUDE; Marine Geochemistry @ AWI; MARUM; Mass of molecular formulas; Nitrogen/Carbon ratio; Oxygen/Carbon ratio; Polarstern; PS73; PS73/002-1; PS73/004-1; PS73/006-1; PS73/006-3; PS73/008-1; PS73/010-2; PS73/013-1; PS73/015-1; PS73/015-2; PS73/017-2; PS73/019-1; PS73/022-1; PS73/024-1; PS73/026-1; PS73/026-2; PS73/028-1; PS73/030-1; PS73/032-1; PS73/032-4; PS73/034-1; PS73/036-1; PS73/038-1; PS73/038-2; PS73/042-1; PS73/044-1; PS73/047-1; PS73/051-1; PS73/054-1; PS73/056-1; PS73/064-1; PS73/069-2; PS73/070-1; PS73/071-1; PS73/072-1; PS73/073-1; PS73/074-1; PS73/S10; PS73/S11; PS73/S13; PS73/S15; PS73/S16; PS73/S17; PS73/S19; PS73/S2; PS73/S21; PS73/S24; PS73/S26; PS73/S29; PS73/S3; PS73/S30; PS73/S32; PS73/S34; PS73/S36; PS73/S38; PS73/S41; PS73/S43; PS73/S44; PS73/S45; PS73/S46; PS73/S47; PS73/S49; PS73/S5; PS73/S52; PS73/S55; PS73/S57; PS73/S58; PS73/S60; PS73/S66; PS73/S67; PS73/S68; PS73/S69; PS73/S7; PS73/S70; PS73/S71; PS73/SW1; PS73/SW10; PS73/SW11; PS73/SW12; PS73/SW13; PS73/SW14; PS73/SW15; PS73/SW16; PS73/SW17; PS73/SW18; PS73/SW19; PS73/SW2; PS73/SW3; PS73/SW4; PS73/SW5; PS73/SW6; PS73/SW7; PS73/SW8; PS73/SW9; RAMSES; RAMSES hyperspectral radiometer; South Atlantic Ocean; Station label; Sulfur/Carbon ratio; Surface water sample; SWS; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 1400 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Methionine-sulfur yield of two depth profiles of solid-phase extractable dissolved organic matter obtained during POLARSTERN cruise ANT-XXV (PS73) (2016)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Keywords: ANT-XXV/1; ANT-XXV/2; Area/locality; AWI_EcolChem; AWI_MarGeoChem; Canarias Sea; Center for Marine Environmental Sciences; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; Ecological Chemistry @ AWI; Event label; LATITUDE; LONGITUDE; Marine Geochemistry @ AWI; MARUM; Methionine; Polarstern; PS73; PS73/026-1; PS73/026-2; PS73/073-1; Solid phase extraction (SPE) with PPL sorbent (after Flerus et al. 2012); Station label; Sulfur, organic, dissolved, extracted; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 65 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Quantification and molecular characterization of dissolved organic sulfur in water samples obtained during POLARSTERN cruise ANT-XXV (PS73) to the East Atlantic and the Southern Ocean (2016)
    PANGAEA
    In:  Supplement to: Ksionzek, Kerstin B; Lechtenfeld, Oliver J; McCallister, S Leigh; Schmitt-Kopplin, Philippe; Geuer, Jana K; Geibert, Walter; Koch, Boris P (2016): Dissolved organic sulfur in the ocean: Biogeochemistry of a petagram inventory. Science, 354(6311), 456-459, https://doi.org/10.1126/science.aaf7796
    Details
    Publication Date: 2023-03-16
    Description: Although sulfur is an essential element for marine primary production and critical for climate processes, little is known about the oceanic pool of non-volatile dissolved organic sulfur (DOS). We present a basin-scale distribution of solid phase extractable DOS in the East Atlantic Ocean and the Atlantic sector of the Southern Ocean. While molar DOS versus dissolved organic nitrogen (DON) ratios of 0.11 ± 0.024 in Atlantic surface water resembled phytoplankton stoichiometry (S/N ~ 0.08), increasing dissolved organic carbon (DOC) versus DOS ratios and decreasing methionine-S yield demonstrated selective DOS removal and active involvement in marine biogeochemical cycles. Based on stoichiometric estimates, the minimum global inventory of marine DOS is 6.7 Pg S, exceeding all other marine organic sulfur reservoirs by an order of magnitude.
    Keywords: AWI_EcolChem; AWI_MarGeoChem; Center for Marine Environmental Sciences; Ecological Chemistry @ AWI; Marine Geochemistry @ AWI; MARUM
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Terrigenous input and marine productivity for the Pacific sector of the Southern Ocean based on lipid biomarkers (2016)
    PANGAEA
    In:  Supplement to: Jaeschke, Andrea; Wengler, Marc; Hefter, Jens; Ronge, Thomas A; Geibert, Walter; Mollenhauer, Gesine; Gersonde, Rainer; Lamy, Frank (2017): A biomarker perspective on dust, productivity and sea surface temperature in the Pacific sector of the Southern Ocean. Geochimica et Cosmochimica Acta, 204, 120-139, https://doi.org/10.1016/j.gca.2017.01.045
    Details
    Publication Date: 2023-05-08
    Description: In this study, we present a new multiproxy data set of terrigenous input, marine productivity and sea surface temperature (SST) from 52 surface sediment samples collected along E-W transects in the Pacific sector of the Southern Ocean. Allochtonous terrigenous input was characterized by the distribution of plant wax n-alkanes and soil-derived branched glycerol dialkyl glycerol tetraethers (brGDGTs). 230Th-normalized burial rates of both compound groups were highest close to the potential sources in Australia and New Zealand and are strongly related to lithogenic contents, indicating common sources and transport. Detection of both long-chain n-alkanes and brGDGTs at the most remote sites in the open ocean strongly suggests a primarily eolian transport mechanism to at least 110°W, i.e. by prevailing westerly winds. Two independent organic SST proxies were used, the UK'37 based on long-chain alkenones, and the TEX86 based on isoprenoid GDGTs. Both, UK'37 and TEX86 indices show robust relationships with temperature over a temperature range between 0.5 and 20°C, likely implying different seasonal and regional imprints on the temperature signal. While alkenone-based temperature estimates reliably reflect modern SST even at the low temperature end, large temperature residuals are observed for the polar ocean using the TEX86 index. 230Th-normalized burial rates of alkenones are highest close to the Subtropical Front and are positively related to lithogenic fluxes throughout the study area. In contrast, highest isoGDGT burial south of the Antarctic Polar Front is not related with dust flux but may be largely controlled by diatom blooms, and thus high opal fluxes during austral summer.
    Keywords: AWI_MarGeoChem; AWI_Paleo; Marine Geochemistry @ AWI; Paleoenvironmental Reconstructions from Marine Sediments @ AWI
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Terrigenous input and sea surface temperatures in the Pacific sector of the Southern Ocean based on lipid biomarkers (2016)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Alkenone, unsaturation index UK'37; Alkenones; ANT-XXVI/2; AWI_MarGeoChem; AWI_Paleo; Branched glycerol dialkyl glycerol tetraether; Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; Gravity corer (Kiel type); Isoprenoid glycerol dialkyl glycerol tetraether; KL; Latitude of event; Longitude of event; Marine Geochemistry @ AWI; MUC; MultiCorer; n-Alkane; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; ParaSound; Piston corer (BGR type); Polarstern; PS; PS75/046-2; PS75/051-1; PS75/053-1; PS75/063-1; PS75/070-2; PS75/072-2; PS75/076-2; PS75/080-1; PS75/082-1; PS75/084-1; PS75/085-1; PS75/088-6; PS75/092-1; PS75/094-1; PS75/097-4; PS75/099-4; PS75/100-4; PS75/101-1; PS75/104-1; PS75/105-2; PS75 BIPOMAC; SL; SO213/1; SO213/1_10-1; SO213/1_1-1; SO213/1_11-1; SO213/1_12-1; SO213/1_14-1; SO213/1_15-1; SO213/1_17-1; SO213/1_19-1; SO213/1_20-1; SO213/1_22-4; SO213/1_6-1; SO213/1_7-1; SO213/1_8-1; SO213/2; SO213/2_23-1; SO213/2_26-1; SO213/2_49-3; SO213/2_54-4; SO213/2_57-1; SO213/2_58-1; SO213/2_59-1; SO213/2_60-2; SO213/2_61-1; SO213/2_63-1; SO213/2_64-2; SO213/2_68-1; SO213/2_76-1; SO213/2_78-1; SO213/2_79-1; SO213/2_81-1; SO213/2_84-2; SO213/2_85-1; SO213/2_87-1; Sonne; SOPATRA; South Pacific Ocean; Tetraether index of 86 carbon atoms; Tetraether index of 86 carbon atoms, high-temperature region; Tetraether index of 86 carbon atoms, low-temperature region
    Type: Dataset
    Format: text/tab-separated-values, 411 data points
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    DATA PANGAEA
  • 8
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    Physical oceanography on board of POLARSTERN (1983-11-22 to 2016-02-14) (2016)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven | Supplement to: Driemel, Amelie; Fahrbach, Eberhard; Rohardt, Gerd; Beszczynska-Möller, Agnieszka; Boetius, Antje; Budéus, Gereon; Cisewski, Boris; Engbrodt, Ralph; Gauger, Steffen; Geibert, Walter; Geprägs, Patrizia; Gerdes, Dieter; Gersonde, Rainer; Gordon, Arnold L; Grobe, Hannes; Hellmer, Hartmut H; Isla, Enrique; Jacobs, Stanley S; Janout, Markus A; Jokat, Wilfried; Klages, Michael; Kuhn, Gerhard; Meincke, Jens; Ober, Sven; Østerhus, Svein; Peterson, Ray G; Rabe, Benjamin; Rudels, Bert; Schauer, Ursula; Schumacher, Stefanie; Schröder, Michael; Sieger, Rainer; Sildam, Jüri; Soltwedel, Thomas; Stangeew, Elena; Stein, Manfred; Strass, Volker H; Thiede, Jörn; Tippenhauer, Sandra; Veth, Cornelis; von Appen, Wilken-Jon; Weirig, Marie-France; Wisotzki, Andreas; Wolf-Gladrow, Dieter A; Kanzow, Torsten (2017): From pole to pole: 33 years of physical oceanography onboard R/V Polarstern. Earth System Science Data, 9(1), 211-220, https://doi.org/10.5194/essd-9-211-2017
    Details
    Publication Date: 2023-10-18
    Description: Measuring temperature and salinity profiles in the world's oceans is crucial to understanding ocean dynamics and its influence on the heat budget, the water cycle, the marine environment and on our climate. Since 1983 the German research vessel and icebreaker Polarstern has been the platform of numerous CTD (conductivity, temperature, depth instrument) deployments in the Arctic and the Antarctic. We report on a unique data collection spanning 33 years of polar CTD data. In total 131 data sets (1 data set per cruise leg) containing data from 10 063 CTD casts are now freely available. During this long period five CTD types with different characteristics and accuracies have been used. Therefore the instruments and processing procedures (sensor calibration, data validation, etc.) are described in detail. This compilation is special not only with regard to the quantity but also the quality of the data - the latter indicated for each data set using defined quality codes. The complete data collection includes a number of repeated sections for which the quality code can be used to investigate and evaluate long-term changes. Beginning with 2010, the salinity measurements presented here are of the highest quality possible in this field owing to the introduction of the OPTIMARE Precision Salinometer.
    Keywords: Author(s); AWI_PhyOce; Campaign; Date/time end; Date/time start; Method comment; Number of observations; Ocean and sea region; Persistent Identifier; Physical Oceanography @ AWI; Principal investigator; Quality code; Uniform resource locator/link to image; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 1695 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    230Th-normalized biomarker fluxes in the Pacific sector of the Southern Ocean (2016)
    PANGAEA
    Details
    Publication Date: 2024-04-23
    Keywords: 230Th-normalised; Accumulation rate, alkenone per year; Accumulation rate, branched glycerol dialkyl glycerol tetraether per year; Accumulation rate, isoprenoid glycerol dialkyl glycerol tetraether per year; Accumulation rate, n-Alkanes per year; ANT-XXVI/2; AWI_MarGeoChem; AWI_Paleo; Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; KL; Latitude of event; Longitude of event; Marine Geochemistry @ AWI; MUC; MultiCorer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS75/046-1; PS75/051-2; PS75/053-1; PS75/063-1; PS75/070-1; PS75/072-3; PS75/076-1; PS75/080-2; PS75/082-2; PS75/084-1; PS75/085-2; PS75/088-3; PS75/092-1; PS75/094-3; PS75/097-5; PS75/099-1; PS75/100-1; PS75/101-2; PS75/104-2; PS75/105-1; PS75 BIPOMAC; SO213/1; SO213/1_14-1; SO213/1_22-4; SO213/2; SO213/2_26-1; SO213/2_54-4; SO213/2_76-1; SO213/2_78-1; SO213/2_79-1; SO213/2_84-2; SO213/2_87-1; Sonne; SOPATRA; South Pacific Ocean
    Type: Dataset
    Format: text/tab-separated-values, 116 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES (2016)
    Royal Society
    In:  EPIC3Philosophical Transactions A, Royal Society
    Details
    Publication Date: 2019-07-17
    Description: Continental shelves and shelf seas play a central role in the global carbon cycle. However, their importance with respect to trace element and isotope (TEI) inputs to ocean basins is less well understood. Here, we present major findings on shelf TEI biogeochemistry from the GEOTRACES program as well as a proof-of-concept for a new method to estimate shelf TEI fluxes. The case studies focus on advances in our understanding of TEI cycling in the Arctic, transformations within a major river estuary (Amazon), shelf sediment micronutrient fluxes, and basin-scale estimates of submarine groundwater discharge. The proposed shelf flux tracer is 228-radium (T1/2=5.75 y), which is continuously supplied to the shelf from coastal aquifers, sediment porewater exchange, and rivers. Model-derived shelf 228Ra fluxes are combined with TEI/ 228Ra ratios to quantify ocean TEI fluxes from the western North Atlantic margin. The results from this new approach agree well with previous estimates for shelf Co, Fe, Mn, and Zn inputs and exceed published estimates of atmospheric deposition by factors of ~3-23. Lastly, recommendations are made for additional GEOTRACES process studies and coastal margin-focused section cruises that will help refine the model and provide better insight on the mechanisms driving shelf-derived TEI fluxes to the ocean.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
    Location Call Number Limitation Availability
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    PAPER (OA)
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