On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison
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, use...
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ftird:oai:ird.fr:fdi:010061351 2023-05-15T13:58:21+02:00 On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison Mignot, Juliette Swingedouw, D. Deshayes, Julie Marti, O. Talandier, C. Seferian, R. Lengaigne, Matthieu Madec, G. MONDE 2013 http://www.documentation.ird.fr/hor/fdi:010061351 EN eng http://www.documentation.ird.fr/hor/fdi:010061351 oai:ird.fr:fdi:010061351 Mignot Juliette, Swingedouw D., Deshayes Julie, Marti O., Talandier C., Seferian R., Lengaigne Matthieu, Madec G. On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison. Ocean Modelling, 2013, 72, p. 167-184. Ocean modelling Parameterizations Climate model Coupled ocean biogeochemistry text 2013 ftird 2020-08-21T06:54:05Z 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. Text Antarc* Antarctic Southern Ocean IRD (Institute de recherche pour le développement): Horizon Antarctic Southern Ocean The Antarctic Laplace ENVELOPE(141.467,141.467,-66.782,-66.782) |
institution |
Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
op_collection_id |
ftird |
language |
English |
topic |
Ocean modelling Parameterizations Climate model Coupled ocean biogeochemistry |
spellingShingle |
Ocean modelling Parameterizations Climate model Coupled ocean biogeochemistry Mignot, Juliette Swingedouw, D. Deshayes, Julie Marti, O. Talandier, C. Seferian, R. Lengaigne, Matthieu Madec, G. On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison |
topic_facet |
Ocean modelling Parameterizations Climate model Coupled ocean biogeochemistry |
description |
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. |
format |
Text |
author |
Mignot, Juliette Swingedouw, D. Deshayes, Julie Marti, O. Talandier, C. Seferian, R. Lengaigne, Matthieu Madec, G. |
author_facet |
Mignot, Juliette Swingedouw, D. Deshayes, Julie Marti, O. Talandier, C. Seferian, R. Lengaigne, Matthieu Madec, G. |
author_sort |
Mignot, Juliette |
title |
On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison |
title_short |
On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison |
title_full |
On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison |
title_fullStr |
On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison |
title_full_unstemmed |
On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison |
title_sort |
on the evolution of the oceanic component of the ipsl climate models from cmip3 to cmip5 : a mean state comparison |
publishDate |
2013 |
url |
http://www.documentation.ird.fr/hor/fdi:010061351 |
op_coverage |
MONDE |
long_lat |
ENVELOPE(141.467,141.467,-66.782,-66.782) |
geographic |
Antarctic Southern Ocean The Antarctic Laplace |
geographic_facet |
Antarctic Southern Ocean The Antarctic Laplace |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
http://www.documentation.ird.fr/hor/fdi:010061351 oai:ird.fr:fdi:010061351 Mignot Juliette, Swingedouw D., Deshayes Julie, Marti O., Talandier C., Seferian R., Lengaigne Matthieu, Madec G. On the evolution of the oceanic component of the IPSL climate models from CMIP3 to CMIP5 : a mean state comparison. Ocean Modelling, 2013, 72, p. 167-184. |
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1766266585717145600 |