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

Charette, Matthew A., Kipp, Lauren E., Jensen, Laramie T., Dabrowski, Jessica S., Whitmore, Laura M., Fitzsimmons, Jessica N., Williford, Tatiana, Ulfsbo, Adam, Jones, Elizabeth, Bundy, Randelle M., Vivancos, Sebastian M., Pahnke, Katharina, John, Seth G., Xiang, Yang, Hatta, Mariko, Petrova, Mariia V., Heimbürger-Boavida, Lars-Eric, Bauch, Dorothea , Newton, Robert, Pasqualini, Angelica, Agather, Alison M., Amon, Rainer M.W., Anderson, Robert F., Andersson, Per S., Benner, Ronald, Bowman, Katlin L., Edwards, R. Lawrence, Gdaniec, Sandra, Gerringa, Loes J.A., González, Aridane G., Granskog, Mats, Haley, Brian, Hammerschmidt, Chad R., Hansell, Dennis A., Henderson, Paul B., Kadko, David C., Kaiser, Karl, Laan, Patrick, Lam, Phoebe J., Lamborg, Carl H., Levier, Martin, Li, Xianglei, Margolin, Andrew R., Measures, Chris, Middag, Rob, Millero, Frank J., Moore, Willard S., Paffrath, Ronja, Planquette, Hélène, Rabe, Benjamin, Reader, Heather, Rember, Robert, Rijkenberg, Micha J.A., Roy-Barman, Matthieu, Rutgers van der Loeff, Michiel, Saito, Mak, Schauer, Ursula, Schlosser, Peter, Sherrell, Robert M., Shiller, Alan M., Slagter, Hans, Sonke, Jeroen E., Stedmon, Colin, Woosley, Ryan J., Valk, Ole, van Ooijen, Jan and Zhang, Ruifeng (2020) The Transpolar Drift as a Source of Riverine and Shelf-Derived Trace Elements to the Central Arctic Ocean. Open Access Journal of Geophysical Research: Oceans, 125 (5). e2019JC015920. DOI 10.1029/2019JC015920.

[thumbnail of 2019JC015920.pdf]
2019JC015920.pdf - Accepted Version

Download (2MB) | Preview
[thumbnail of 2019JC015920.pdf]
2019JC015920.pdf - Published Version

Download (8MB) | Preview

Supplementary data:


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.

Document Type: Article
Keywords: Arctic Ocean, Transpolar Drift, trace elements, carbon, nutrients, GEOTRACES
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Woods Hole
Refereed: Yes
Open Access Journal?: No
Publisher: AGU (American Geophysical Union), Wiley
Related URLs:
Date Deposited: 14 Apr 2020 12:08
Last Modified: 08 Feb 2023 09:35

Actions (login required)

View Item View Item