The University of Southampton
University of Southampton Institutional Repository

Evaluating global ocean carbon models: the importance of realistic physics

Evaluating global ocean carbon models: the importance of realistic physics
Evaluating global ocean carbon models: the importance of realistic physics
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.
0886-6236
GB3017
Doney, S.C.
4c4985b2-bcb3-463a-9b4b-ead5b79ea9ac
Lindsay, K.
efddd34f-75fb-4959-b720-548b03fef29c
Caldeira, K.
eadaaac1-4409-4a81-ae55-8a3fc078256a
Campin, J-M.
edef92ac-5775-4f4a-8da1-74a9b1cfb765
Drange, H.
fcebd67c-c049-4486-afbd-5e977c4c2c25
Dutay, J-C.
7ec4a48e-4f4f-4ae7-b957-eeca8f130eee
Follows, M.
f3448ef4-cb89-4b64-91a0-836e9b8f21b9
Gao, Y.
3f048356-567d-4308-853f-d98fabfcb6fb
Gnanadesikan, A.
58fdbed1-e584-436b-b801-421e9509b511
Gruber, N.
fa4cf423-bdd8-43fa-8401-5b3d33308808
Ishida, A.
10936baa-36ac-4df7-b009-77dfa069d80b
Joos, F.
f5c1c002-c305-416b-927b-aa843a6efc87
Madec, G.
7e2ec04b-896a-4861-b2d0-b74f39d748c2
Maier-Reimer, E.
6e989e27-8061-42d1-ae64-b0672b7f1882
Marshall, J.C.
da7dd204-1309-425c-992b-a52c74407d56
Matear, R.J.
22d47009-8b64-4a5d-a173-8edab042105c
Monfray, P.
602b4237-eee7-425b-8308-9635d5a45b9a
Mouchet, A.
ba5a0969-7038-4dc6-8950-847b6c2303e6
Najjar, R.
4dea54dc-0e30-431b-b60b-5ff9d48a0eee
Orr, J.C.
59198c8e-f89d-40ec-90b5-1d94de00ac5a
Plattner, G-K.
adb196e0-3e6e-4fa8-9d6c-6981014df1e3
Sarmiento, J.
30aa0f8a-0ee3-4b45-b3ec-8186ce09f428
Schlitzer, R.
4e0eec4d-219b-4574-a343-d3879aaa7e5a
Slater, R.
d379beb8-2f9b-4547-813a-246b9b9415db
Totterdell, I.J.
aa4619a0-1b39-4b1b-8633-f416c6063817
Weirig, M-F.
e848f325-2d50-4b0f-846a-1104f096d486
Yamanaka, Y.
dcb711e3-ddcb-4ee8-b0a1-6d9031b846ce
Yool, A.
882aeb0d-dda0-405e-844c-65b68cce5017
Doney, S.C.
4c4985b2-bcb3-463a-9b4b-ead5b79ea9ac
Lindsay, K.
efddd34f-75fb-4959-b720-548b03fef29c
Caldeira, K.
eadaaac1-4409-4a81-ae55-8a3fc078256a
Campin, J-M.
edef92ac-5775-4f4a-8da1-74a9b1cfb765
Drange, H.
fcebd67c-c049-4486-afbd-5e977c4c2c25
Dutay, J-C.
7ec4a48e-4f4f-4ae7-b957-eeca8f130eee
Follows, M.
f3448ef4-cb89-4b64-91a0-836e9b8f21b9
Gao, Y.
3f048356-567d-4308-853f-d98fabfcb6fb
Gnanadesikan, A.
58fdbed1-e584-436b-b801-421e9509b511
Gruber, N.
fa4cf423-bdd8-43fa-8401-5b3d33308808
Ishida, A.
10936baa-36ac-4df7-b009-77dfa069d80b
Joos, F.
f5c1c002-c305-416b-927b-aa843a6efc87
Madec, G.
7e2ec04b-896a-4861-b2d0-b74f39d748c2
Maier-Reimer, E.
6e989e27-8061-42d1-ae64-b0672b7f1882
Marshall, J.C.
da7dd204-1309-425c-992b-a52c74407d56
Matear, R.J.
22d47009-8b64-4a5d-a173-8edab042105c
Monfray, P.
602b4237-eee7-425b-8308-9635d5a45b9a
Mouchet, A.
ba5a0969-7038-4dc6-8950-847b6c2303e6
Najjar, R.
4dea54dc-0e30-431b-b60b-5ff9d48a0eee
Orr, J.C.
59198c8e-f89d-40ec-90b5-1d94de00ac5a
Plattner, G-K.
adb196e0-3e6e-4fa8-9d6c-6981014df1e3
Sarmiento, J.
30aa0f8a-0ee3-4b45-b3ec-8186ce09f428
Schlitzer, R.
4e0eec4d-219b-4574-a343-d3879aaa7e5a
Slater, R.
d379beb8-2f9b-4547-813a-246b9b9415db
Totterdell, I.J.
aa4619a0-1b39-4b1b-8633-f416c6063817
Weirig, M-F.
e848f325-2d50-4b0f-846a-1104f096d486
Yamanaka, Y.
dcb711e3-ddcb-4ee8-b0a1-6d9031b846ce
Yool, A.
882aeb0d-dda0-405e-844c-65b68cce5017

Doney, S.C., Lindsay, K., Caldeira, K., Campin, J-M., Drange, H., Dutay, J-C., Follows, M., Gao, Y., Gnanadesikan, A., Gruber, N., Ishida, A., Joos, F., Madec, G., Maier-Reimer, E., Marshall, J.C., Matear, R.J., Monfray, P., Mouchet, A., Najjar, R., Orr, J.C., Plattner, G-K., Sarmiento, J., Schlitzer, R., Slater, R., Totterdell, I.J., Weirig, M-F., Yamanaka, Y. and Yool, A. (2004) Evaluating global ocean carbon models: the importance of realistic physics. Global Biogeochemical Cycles, 18, GB3017. (doi:10.1029/2003GB002150).

Record type: Article

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.

Full text not available from this repository.

More information

Published date: 15 September 2004

Identifiers

Local EPrints ID: 64796
URI: https://eprints.soton.ac.uk/id/eprint/64796
ISSN: 0886-6236
PURE UUID: 3b6507b8-068e-4035-8866-2cc93f5f8605

Catalogue record

Date deposited: 15 Jan 2009
Last modified: 13 Mar 2019 20:20

Export record

Altmetrics

Contributors

Author: S.C. Doney
Author: K. Lindsay
Author: K. Caldeira
Author: J-M. Campin
Author: H. Drange
Author: J-C. Dutay
Author: M. Follows
Author: Y. Gao
Author: A. Gnanadesikan
Author: N. Gruber
Author: A. Ishida
Author: F. Joos
Author: G. Madec
Author: E. Maier-Reimer
Author: J.C. Marshall
Author: R.J. Matear
Author: P. Monfray
Author: A. Mouchet
Author: R. Najjar
Author: J.C. Orr
Author: G-K. Plattner
Author: J. Sarmiento
Author: R. Schlitzer
Author: R. Slater
Author: I.J. Totterdell
Author: M-F. Weirig
Author: Y. Yamanaka
Author: A. Yool

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×