Evaluating global ocean carbon models : the importance of realistic physics
Doney, Scott C.
Follows, Michael J.
Marshall, John C.
Matear, Richard J.
Najjar, Raymond G.
Orr, James C.
Sarmiento, Jorge L.
Slater, Richard D.
Totterdell, Ian J.
MetadataShow full item record
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.
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.
Showing items related by title, author, creator and subject.
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 (American Geophysical Union, 2007-08-08)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. ...
Changes in ocean heat, carbon content, and ventilation : a review of the first decade of GO-SHIP Global Repeat Hydrography Talley, Lynne; Feely, Richard A.; Sloyan, Bernadette M.; Wanninkhof, Rik; Baringer, Molly; Bullister, John L.; Carlson, Craig A.; Doney, Scott C.; Fine, Rana A.; Firing, Eric; Gruber, Nicolas; Hansell, Dennis A.; Ishii, Masayoshi; Johnson, Gregory; Katsumata, K.; Key, Robert M.; Kramp, Martin; Langdon, Chris; Macdonald, Alison M.; Mathis, Jeremy T.; McDonagh, Elaine L.; Mecking, Sabine; Millero, Frank J.; Mordy, Calvin; Nakano, T.; Sabine, Chris L.; Smethie, William; Swift, James H.; Tanhua, Toste; Thurnherr, Andreas M.; Warner, Mark J.; Zhang, Jia-Zhong (2015-05-30)The ocean, a central component of Earth’s climate system, is changing. Given the global scope of these changes, highly accurate measurements of physical and biogeochemical properties need to be conducted over the full water ...
Wanninkhof, Rik; Park, Geun-Ha; Takahashi, Taro; Sweeney, Colm; Feely, Richard A.; Nojiri, Yukihiro; Gruber, Nicolas; Doney, Scott C.; McKinley, Galen A.; Lenton, A.; Le Quere, Corinne; Heinze, Christoph; Schwinger, Jorg; Graven, Heather; Khatiwala, Samar (Copernicus Publications on behalf of the European Geosciences Union, 2013-03-22)The globally integrated sea–air anthropogenic carbon dioxide (CO2) flux from 1990 to 2009 is determined from models and data-based approaches as part of the Regional Carbon Cycle Assessment and Processes (RECCAP) project. ...