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


Matthew A. Charette, Woods Hole Oceanographic InstitutionFollow
Lauren E. Kipp, Dalhousie University
Laramie T. Jensen, Texas A&M University
Jessica S. Dabrowski, Woods Hole Oceanographic Institution
Laura M. Whitmore, University of Southern MississippiFollow
Jessica N. Fitzsimmons, Texas A&M UniversityFollow
Tatiana Williford, Texas A&M University
Adam Ulfsbo, Göteborgs Universitet
Elizabeth Jones, Havforskningsinstituttet
Randelle M. Bundy, Woods Hole Oceanographic Institution
Sebastian M. Vivancos, Lamont-Doherty Earth ObservatoryFollow
Katharina Pahnke, Universität Oldenburg
Seth G. John, University of Southern CaliforniaFollow
Yang Xiang, University of California, Santa CruzFollow
Mariko Hatta, University of Hawaiʻi at MānoaFollow
Mariia V. Petrova, Aix Marseille Université
Lars Eric Heimbürger-Boavida, Aix Marseille Université
Dorothea Bauch, GEOMAR - Helmholtz-Zentrum für Ozeanforschung KielFollow
Robert Newton, Lamont-Doherty Earth ObservatoryFollow
Angelica Pasqualini, Columbia University in the City of New York
Alison M. Agather, Wright State University
Rainer M.W. Amon, Texas A&M University
Robert F. Anderson, Lamont-Doherty Earth ObservatoryFollow
Per S. Andersson, Naturhistoriska riksmuseet
Ronald Benner, University of South Carolina
Katlin L. Bowman, University of California, Santa CruzFollow
R. Lawrence Edwards, University of Minnesota Twin CitiesFollow
Sandra Gdaniec, Naturhistoriska riksmuseet
Loes J.A. Gerringa, Royal Netherlands Institute for Sea Research - NIOZ
Aridane G. González, Université de Brest (UBO)
Mats Granskog, Norsk Polarinstitutt
Brian Haley, Oregon State University
Chad R. Hammerschmidt, Wright State UniversityFollow

Document Type


Publication Date



Marine Science


Ocean Science and Engineering


©2020. American Geophysical Union. 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 and permafrost degradation will likely lead to an increase in the flux of TEIs into the Arctic Ocean.

Publication Title

Journal of Geophysical Research: Oceans





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