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Evaluating global ocean carbon models : the importance of realistic physics

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dc.contributor.author Doney, Scott C.
dc.contributor.author Lindsay, Keith
dc.contributor.author Caldeira, Ken
dc.contributor.author Campin, J.-M.
dc.contributor.author Drange, Helge
dc.contributor.author Dutay, J.-C.
dc.contributor.author Follows, Michael J.
dc.contributor.author Gao, Y.
dc.contributor.author Gnanadesikan, Anand
dc.contributor.author Gruber, Nicolas
dc.contributor.author Ishida, Akio
dc.contributor.author Joos, Fortunat
dc.contributor.author Madec, G.
dc.contributor.author Maier-Reimer, Ernst
dc.contributor.author Marshall, John C.
dc.contributor.author Matear, Richard J.
dc.contributor.author Monfray, Patrick
dc.contributor.author Mouchet, Anne
dc.contributor.author Najjar, Raymond G.
dc.contributor.author Orr, James C.
dc.contributor.author Plattner, Gian-Kasper
dc.contributor.author Sarmiento, Jorge L.
dc.contributor.author Schlitzer, Reiner
dc.contributor.author Slater, Richard D.
dc.contributor.author Totterdell, Ian J.
dc.contributor.author Weirig, Marie-France
dc.contributor.author Yamanaka, Yasuhiro
dc.contributor.author Yool, A.
dc.date.accessioned 2010-05-05T18:46:36Z
dc.date.available 2010-05-05T18:46:36Z
dc.date.issued 2004-09-15
dc.identifier.citation Global Biogeochemical Cycles 18 (2004): GB3017 en_US
dc.identifier.uri http://hdl.handle.net/1912/3394
dc.description Author Posting. © American Geophysical Union, 2004. 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 18 (2004): GB3017, doi:10.1029/2003GB002150. en_US
dc.description.abstract A suite of standard ocean hydrographic and circulation metrics are applied to the equilibrium physical solutions from 13 global carbon models participating in phase 2 of the Ocean Carbon-cycle Model Intercomparison Project (OCMIP-2). Model-data comparisons are presented for sea surface temperature and salinity, seasonal mixed layer depth, meridional heat and freshwater transport, 3-D hydrographic fields, and meridional overturning. Considerable variation exists among the OCMIP-2 simulations, with some of the solutions falling noticeably outside available observational constraints. For some cases, model-model and model-data differences can be related to variations in surface forcing, subgrid-scale parameterizations, and model architecture. These errors in the physical metrics point to significant problems in the underlying model representations of ocean transport and dynamics, problems that directly affect the OCMIP predicted ocean tracer and carbon cycle variables (e.g., air-sea CO2 flux, chlorofluorocarbon and anthropogenic CO2 uptake, and export production). A substantial fraction of the large model-model ranges in OCMIP-2 biogeochemical fields (±25–40%) represents the propagation of known errors in model physics. Therefore the model-model spread likely overstates the uncertainty in our current understanding of the ocean carbon system, particularly for transport-dominated fields such as the historical uptake of anthropogenic CO2. A full error assessment, however, would need to account for additional sources of uncertainty such as more complex biological-chemical-physical interactions, biases arising from poorly resolved or neglected physical processes, and climate change. en_US
dc.description.sponsorship S. Doney and K. Lindsay acknowledge support from NASA through the U.S. OCMIP program and the U.S. JGOFS Synthesis and Modeling Project (NASA grant W-19,274). The National Center for Atmospheric Research is sponsored by the National Science Foundation. N. Gruber acknowledges support from NASA grant OCEAN- 0250-0231. F. Joos and G.-K. Plattner acknowledge support by the Swiss National Science Foundation and the Swiss Federal Office of Science and Education through the EU-projects GOSAC and MilECLim and enjoyed scientific advice by T. F. Stocker, G. Delaygue, R. Knutti, and O. Marchal. European model contributions were supported by the EU GOSAC project (contract ENV4-CT97-0495). We also acknowledge support from IGBP/ GAIM to maintain the OCMIP project. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2003GB002150
dc.subject Global carbon models en_US
dc.subject Ocean carbon systems en_US
dc.subject OCMIP-2 en_US
dc.title Evaluating global ocean carbon models : the importance of realistic physics en_US
dc.type Article en_US


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