Impact of circulation on export production, dissolved organic matter, and dissolved oxygen in the ocean : results from Phase II of the Ocean Carbon-cycle Model Intercomparison Project (OCMIP-2) Najjar, Raymond G. Jin, X. Louanchi, F. Aumont, Olivier Caldeira, Ken Doney, Scott C. Dutay, J.-C. Follows, Michael J. Gruber, Nicolas Joos, Fortunat Lindsay, Keith Maier-Reimer, Ernst Matear, Richard J. Matsumoto, K. Monfray, Patrick Mouchet, Anne Orr, James C. Plattner, Gian-Kasper Sarmiento, Jorge L. Schlitzer, Reiner Slater, Richard D. Weirig, Marie-France Yamanaka, Yasuhiro Yool, Andrew 2010-05-06T19:32:16Z 2010-05-06T19:32:16Z 2007-08-08
dc.description Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 21 (2007): GB3007, doi:10.1029/2006GB002857. en_US
dc.description.abstract Results are presented of export production, dissolved organic matter (DOM) and dissolved oxygen simulated by 12 global ocean models participating in the second phase of the Ocean Carbon-cycle Model Intercomparison Project. A common, simple biogeochemical model is utilized in different coarse-resolution ocean circulation models. The model mean (±1σ) downward flux of organic matter across 75 m depth is 17 ± 6 Pg C yr−1. Model means of globally averaged particle export, the fraction of total export in dissolved form, surface semilabile dissolved organic carbon (DOC), and seasonal net outgassing (SNO) of oxygen are in good agreement with observation-based estimates, but particle export and surface DOC are too high in the tropics. There is a high sensitivity of the results to circulation, as evidenced by (1) the correlation of surface DOC and export with circulation metrics, including chlorofluorocarbon inventory and deep-ocean radiocarbon, (2) very large intermodel differences in Southern Ocean export, and (3) greater export production, fraction of export as DOM, and SNO in models with explicit mixed layer physics. However, deep-ocean oxygen, which varies widely among the models, is poorly correlated with other model indices. Cross-model means of several biogeochemical metrics show better agreement with observation-based estimates when restricted to those models that best simulate deep-ocean radiocarbon. Overall, the results emphasize the importance of physical processes in marine biogeochemical modeling and suggest that the development of circulation models can be accelerated by evaluating them with marine biogeochemical metrics. en_US
dc.description.sponsorship R. G. N. and J. L. S. acknowledge the support of NASA grants NAG5-6451 and NAG5-6591, respectively, as part of the JGOFS Synthesis and Modeling Program. G. K. P. and F. J. acknowledge support by the Swiss National Science Foundation. European contributions were supported by the EU GOSAC Project (ENV4-CT97- 0495). en_US
dc.format.mimetype application/pdf
dc.identifier.citation Global Biogeochemical Cycles 21 (2007): GB3007 en_US
dc.identifier.doi 10.1029/2006GB002857
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.subject Export production en_US
dc.subject Numerical modeling en_US
dc.subject Ocean circulation en_US
dc.title Impact of circulation on export production, dissolved organic matter, and dissolved oxygen in the ocean : results from Phase II of the Ocean Carbon-cycle Model Intercomparison Project (OCMIP-2) en_US
dc.type Article en_US
dspace.entity.type Publication
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