globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-012-1362-8
Scopus ID: 2-s2.0-84876864681
Skill assessment of three earth system models with common marine biogeochemistry
Author: Séférian R.; Bopp L.; Gehlen M.; Orr J.C.; Ethé C.; Cadule P.; Aumont O.; Salas y Mélia D.; Voldoire A.; Madec G.
Source Publication: Climate Dynamics
ISSN: 9307575
Publishing Year: 2013
Volume: 40, Issue:2017-09-10
pages begin: 2549
pages end: 2573
Language: 英语
Keyword: Climate ; Earth system model ; Marine biogeochemistry ; Ocean dynamics ; Skill assessment
English Abstract: We have assessed the ability of a common ocean biogeochemical model, PISCES, to match relevant modern data fields across a range of ocean circulation fields from three distinct Earth system models: IPSL-CM4-LOOP, IPSL-CM5A-LR and CNRM-CM5. 1. The first of these Earth system models has contributed to the IPCC 4th assessment report, while the latter two are contributing to the ongoing IPCC 5th assessment report. These models differ with respect to their atmospheric component, ocean subgrid-scale physics and resolution. The simulated vertical distribution of biogeochemical tracers suffer from biases in ocean circulation and a poor representation of the sinking fluxes of matter. Nevertheless, differences between upper and deep ocean model skills significantly point to changes in the underlying model representations of ocean circulation. IPSL-CM5A-LR and CNRM-CM5. 1 poorly represent deep-ocean circulation compared to IPSL-CM4-LOOP degrading the vertical distribution of biogeochemical tracers. However, their representations of surface wind, wind stress, mixed-layer depth and geostrophic circulations (e. g., Antarctic Circumpolar Current) have been improved compared to IPSL-CM4-LOOP. These improvements result in a better representation of large-scale structure of biogeochemical fields in the upper ocean. In particular, a deepening of 20-40 m of the summer mixed-layer depth allows to capture the 0-0. 5 μgChl L-1 concentrations class of surface chlorophyll in the Southern Ocean. Further improvements in the representation of the ocean mixed-layer and deep-ocean ventilation are needed for the next generations of models development to better simulate marine biogeochemistry. In order to better constrain ocean dynamics, we suggest that biogeochemical or passive tracer modules should be used routinely for both model development and model intercomparisons. © 2012 The Author(s).
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Affiliation: Laboratoire des Sciences du Climat et de l'environnement (LSCE/IPSL), Batiment 712, 91191 Gif sur Yvette, Paris, France; CNRM-GAME (Météo-France, CNRS), Toulouse, France; IPSL/LOCEAN, Paris, France; LPO/IRD/CNRS, Plouzané, France; NOC, Southampton, United Kingdom

Recommended Citation:
Séférian R.,Bopp L.,Gehlen M.,et al. Skill assessment of three earth system models with common marine biogeochemistry[J]. Climate Dynamics,2013-01-01,40(2017-09-10)
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