FN Archimer Export Format
PT J
TI On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5: A mean state comparison
BT 
AF MIGNOT, J.
   SWINGEDOUW, D.
   DESHAYES, Julie
   MARTI, O.
   TALANDIER, Claude
   SEFERIAN, R.
   LENGAIGNE, M.
AS 1:1,2,3;2:4;3:5;4:4;5:5;6:4,6;7:1;8:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 UPMC CNRS IRD MNHN, LOCEAN IPSL, Paris, France.
   Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
   Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland.
   CEA CNRS UVSQ, LSCE IPSL, Gif Sur Yvette, France.
   CNRS IRD UBO IFREMER, LPO, Plouzane, France.
   CNRM GAME Meteo France CNRS, Toulouse, France.
C2 UNIV PARIS 06, FRANCE
   UNIV BERN, SWITZERLAND
   UNIV BERN, SWITZERLAND
   CEA, FRANCE
   CNRS, FRANCE
   CNRM, FRANCE
IF 2.59
TC 30
UR https://archimer.ifremer.fr/doc/00170/28102/26612.pdf
LA English
DT Article
DE ;Ocean modelling;Parameterizations;Climate model;Coupled ocean biogeochemistry
AB This study analyses the impact on the oceanic mean state of the evolution of the oceanic component (NEMO) of the climate model developed at Institut Pierre Simon Laplace (IPSL-CM), from the version IPSL-CM4, used for third phase of the Coupled Model Intercomparison Project (CMIP3), to IPSL-CM5A, used for CMIP5. Several modifications have been implemented between these two versions, in particular an interactive coupling with a biogeochemical module, a 3-band model for the penetration of the solar radiation, partial steps at the bottom of the ocean and a set of physical parameterisations to improve the representation of the impact of turbulent and tidal mixing. A set of forced and coupled experiments is used to single out the effect of each of these modifications and more generally the evolution of the oceanic component on the IPSL coupled models family. Major improvements are located in the Southern Ocean, where physical parameterisations such as partial steps and tidal mixing reinforce the barotropic transport of water mass, in particular in the Antarctic Circumpolar Current) and ensure a better representation of Antarctic bottom water masses. However, our analysis highlights that modifications, which substantially improve ocean dynamics in forced configuration, can yield or amplify biases in coupled configuration. In particular, the activation of radiative biophysical coupling between biogeochemical cycle and ocean dynamics results in a cooling of the ocean mean state. This illustrates the difficulty to improve and tune coupled climate models, given the large number of degrees of freedom and the potential compensating effects masking some biases.
PY 2013
PD DEC
SO Ocean Modelling
SN 1463-5003
PU Elsevier Sci Ltd
VL 72
UT 000327484300013
BP 167
EP 184
DI 10.1016/j.ocemod.2013.09.001
ID 28102
ER

EF