Modeling transport and fate of riverine dissolved organic carbon in the Arctic Ocean
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Follows_Modeling transport.pdf
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Author(s)
McClelland, J. W.
Menemenlis, Dimitris
Townsend-Small, A.
Peterson, B. J.
Manizza, Manfredi
Dutkiewicz, Stephanie
Hill, Christopher N.
Follows, Michael J
Date Issued
October 2009
Journal
Global Biogeochemical Cycles
Publisher
American Geophysical Union (AGU)
Citation
Manizza, M., M. J. Follows, S. Dutkiewicz, J. W. McClelland, D. Menemenlis, C. N. Hill, A. Townsend-Small, and B. J. Peterson. “Modeling Transport and Fate of Riverine Dissolved Organic Carbon in the Arctic Ocean.” Global Biogeochemical Cycles 23, no. 4 (October 7, 2009): n/a–n/a. © 2009 American Geophysical Union
Version
Final published version
Abstract
The spatial distribution and fate of riverine dissolved organic carbon (DOC) in the Arctic may be significant for the regional carbon cycle but are difficult to fully characterize using the sparse observations alone. Numerical models of the circulation and biogeochemical cycles of the region can help to interpret and extrapolate the data and may ultimately be applied in global change sensitivity studies. Here we develop and explore a regional, three-dimensional model of the Arctic Ocean in which, for the first time, we explicitly represent the sources of riverine DOC with seasonal discharge based on climatological field estimates. Through a suite of numerical experiments, we explore the distribution of DOC-like tracers with realistic riverine sources and a simple linear decay to represent remineralization through microbial degradation. The model reproduces the slope of the DOC-salinity relationship observed in the eastern and western Arctic basins when the DOC tracer lifetime is about 10 years, consistent with published inferences from field data. The new empirical parameterization of riverine DOC and the regional circulation and biogeochemical model provide new tools for application in both regional and global change studies.
MIT Department
Massachusetts Institute of Technology. Center for Global Change Science
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1029/2008gb003396
