The Transpolar Drift as a Source of Riverine and Shelf-Derived Trace Elements to the Central Arctic Ocean

• Published in: Journal of Geophysical Research: Oceans
• Main Authors: Charette, Matthew, Kipp, Lauren, Jensen, Laramie, Dabrowski, Jessica, Whitmore, Laura, Fitzsimmons, Jessica, Williford, Tatiana, Ulfsbo, Adam, Jones, Elizabeth, Bundy, Randelle, Vivancos, Sebastian, Pahnke, Katharina, John, Seth, Xiang, Yang, Hatta, Mariko, Petrova, Mariia, Heimbürger-Boavida, Lars-Eric, Bauch, Dorothea, Newton, Robert, Pasqualini, Angelica, Agather, Alison, Amon, Rainer M.W., Anderson, Robert, Andersson, Per, Benner, Ronald, Bowman, Katlin, Edwards, R. Lawrence, Gdaniec, Sandra, Gerringa, Loes J.A., Gonzalez, Aridane G., Granskog, Mats, Haley, Brian, Hammerschmidt, Chad, Hansell, Dennis, Henderson, Paul, Kadko, David, Kaiser, Karl, Lam, Phoebe, Lamborg, Carl, Levier, Martin, Li, Xianglei, Margolin, Andrew, Measures, Chris, Middag, Rob, Millero, Frank, Moore, Willard, Paffrath, Ronja, Planquette, Hélène, Rabe, Benjamin, Reader, Heather
• Other Authors: Department of Marine Chemistry and Geochemistry (WHOI), Woods Hole Oceanographic Institution (WHOI), Dalhousie University Halifax, Lamont-Doherty Earth Observatory (LDEO), Columbia University New York, Texas A&M University College Station, University of Southern Mississippi (USM), Department of Marine Sciences Gothenburg, University of Gothenburg (GU), Tromsø department (IMR), Institute of Marine Research Bergen (IMR), University of Bergen (UiB)-University of Bergen (UiB), School of Oceanography Seattle, University of Washington Seattle, Department of earth and environmental sciences and the Lamont-Doherty earth observatory, Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Department of Earth Sciences USC Los Angeles, University of Southern California (USC), Ocean Sciences Department, University of California USA, University of California Santa Cruz (UC Santa Cruz), University of California (UC)-University of California (UC), Department of Oceanography Honolulu, University of Hawai‘i Mānoa (UHM), Université de Toulon (UTLN), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Helmholtz Centre for Ocean Research Kiel (GEOMAR), Department of Earth and Environmental Engineering New York, Wright State University, Swedish Museum of Natural History (NRM), Department of Biological Sciences Columbia, University of South Carolina Columbia, University of California (UC), Department of Geology and Geophysics, University of Minnesota Twin Cities (UMN), University of Minnesota System-University of Minnesota System, Department of Geological Sciences Stockholm, Stockholm University, Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Géochimie Des Impacts (GEDI), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Royal Netherlands Institute for Sea Research (NIOZ), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Instituto de Oceanografía y Cambio Global (IOCAG), Université de Las Palmas de Gran Canaria Espagne (ULPGC), Norwegian Polar Institute
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: Carbon; Nutrients; GEOTRACES; ACL; Arctic Ocean; Transpolar Drift; Trace elements; [SDE.MCG]Environmental Sciences/Global Changes; [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; Arctic; Central Basin; Fram Strait; laptev; North Atlantic
• Online Access: https://hal.science/hal-02547918; https://hal.science/hal-02547918/document; https://hal.science/hal-02547918/file/Final_version_just_Hg_exported_from_PhD.pdf; https://doi.org/10.1029/2019JC015920

Data from GEOTRACES cruises GN01 (HLY1502) and GN04 (PS94) have been archived at the Biological & Chemical Oceanography Data Management Office (BCO-DMO; https://www.bco-dmo.org/deployment/638807) and PANGAEA (https://www.pangaea.de/?q=PS94&f.campaign%5B%5D=PS94) websites, respectively. The inorganic carbon data are available at the NOAA Ocean Carbon Data System (OCADS doi :10.3334/CDIAC/OTG.CLIVAR_ARC01_33HQ20150809). In addition to these national data archives, the data used in this paper is available as a supplementary downloadable excel file International audience A major surface circulation feature of the Arctic Ocean is the Transpolar Drift (TPD), a current that transports river‐influenced shelf water from the Laptev and East Siberian Seas toward the center of the basin and Fram Strait. In 2015, the international GEOTRACES program included a high‐resolution pan‐Arctic survey of carbon, nutrients, and a suite of trace elements and isotopes (TEIs). The cruises bisected the TPD at two locations in the central basin, which were defined by maxima in meteoric water and dissolved organic carbon concentrations that spanned 600 km horizontally and ~25‐50 m vertically. Dissolved TEIs such as Fe, Co, Ni, Cu, Hg, Nd, and Th, which are generally particle‐reactive but can be complexed by organic matter, were observed at concentrations much higher than expected for the open ocean setting. Other trace element concentrations such as Al, V, Ga, and Pb were lower than expected due to scavenging over the productive East Siberian and Laptev shelf seas. Using a combination of radionuclide tracers and ice drift modeling, the transport rate for the core of the TPD was estimated at 0.9 ± 0.4 Sv (106 m3 s‐1). This rate was used to derive the mass flux for TEIs that were enriched in the TPD, revealing the importance of lateral transport in supplying materials beneath the ice to the central Arctic Ocean and potentially to the North Atlantic Ocean via Fram Strait. Continued intensification of the Arctic hydrologic cycle ...