The Tuning Strategy of IPSL‐CM6A‐LR
Abstract The assessment of current and future risks for natural and human systems associated with climate change largely relies on numerical simulations performed with state‐of‐the‐art climate models. Various steps are involved in the development of such models, from development of individual compon...
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American Geophysical Union (AGU)
2021
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oai:doaj.org-article:d0feb0d749634f6e8523a8c964ccf73c2021-11-24T08:11:41ZThe Tuning Strategy of IPSL‐CM6A‐LR1942-246610.1029/2020MS002340https://doaj.org/article/d0feb0d749634f6e8523a8c964ccf73c2021-05-01T00:00:00Zhttps://doi.org/10.1029/2020MS002340https://doaj.org/toc/1942-2466Abstract The assessment of current and future risks for natural and human systems associated with climate change largely relies on numerical simulations performed with state‐of‐the‐art climate models. Various steps are involved in the development of such models, from development of individual components of the climate system up to free parameter calibration of the fully coupled model. Here, we describe the final tuning phase for the IPSL‐CM6A‐LR climate model. This phase alone lasted more than 3 years and relied on several pillars: (i) the tuning against present‐day conditions given a small adjustment of the ocean surface albedo to compensate for the current oceanic heat uptake, (ii) the release of successive versions after adjustments of the individual components, implying a systematic and recurrent adjustment of the atmospheric energetics, and (iii) the use of a few metrics based on large scale variables such as near‐global mean temperature, summer Arctic sea‐ice extent, as targets for the tuning. Successes, lessons and prospects of this tuning strategy are discussed.Juliette MignotFrédéric HourdinJulie DeshayesOlivier BoucherGuillaume GastineauIonela MusatMartin VancoppenolleJérôme ServonnatArnaud CaubelFrédérique ChéruySébastien DenvilJean‐Louis DufresneChristian EthéLaurent FairheadMarie‐Alice FoujolsJean‐Yves GrandpeixGuillaume LevavasseurOlivier MartiMatthew MenaryCatherine RioClément RoussetYona SilvyAmerican Geophysical Union (AGU)articleatmospheric energetic adjustmentcalibrationclimate model tuningmetricspresent‐day controlPhysical geographyGB3-5030OceanographyGC1-1581ENJournal of Advances in Modeling Earth Systems, Vol 13, Iss 5, Pp n/a-n/a (2021) |
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EN |
| topic |
atmospheric energetic adjustment calibration climate model tuning metrics present‐day control Physical geography GB3-5030 Oceanography GC1-1581 |
| spellingShingle |
atmospheric energetic adjustment calibration climate model tuning metrics present‐day control Physical geography GB3-5030 Oceanography GC1-1581 Juliette Mignot Frédéric Hourdin Julie Deshayes Olivier Boucher Guillaume Gastineau Ionela Musat Martin Vancoppenolle Jérôme Servonnat Arnaud Caubel Frédérique Chéruy Sébastien Denvil Jean‐Louis Dufresne Christian Ethé Laurent Fairhead Marie‐Alice Foujols Jean‐Yves Grandpeix Guillaume Levavasseur Olivier Marti Matthew Menary Catherine Rio Clément Rousset Yona Silvy The Tuning Strategy of IPSL‐CM6A‐LR |
| description |
Abstract The assessment of current and future risks for natural and human systems associated with climate change largely relies on numerical simulations performed with state‐of‐the‐art climate models. Various steps are involved in the development of such models, from development of individual components of the climate system up to free parameter calibration of the fully coupled model. Here, we describe the final tuning phase for the IPSL‐CM6A‐LR climate model. This phase alone lasted more than 3 years and relied on several pillars: (i) the tuning against present‐day conditions given a small adjustment of the ocean surface albedo to compensate for the current oceanic heat uptake, (ii) the release of successive versions after adjustments of the individual components, implying a systematic and recurrent adjustment of the atmospheric energetics, and (iii) the use of a few metrics based on large scale variables such as near‐global mean temperature, summer Arctic sea‐ice extent, as targets for the tuning. Successes, lessons and prospects of this tuning strategy are discussed. |
| format |
article |
| author |
Juliette Mignot Frédéric Hourdin Julie Deshayes Olivier Boucher Guillaume Gastineau Ionela Musat Martin Vancoppenolle Jérôme Servonnat Arnaud Caubel Frédérique Chéruy Sébastien Denvil Jean‐Louis Dufresne Christian Ethé Laurent Fairhead Marie‐Alice Foujols Jean‐Yves Grandpeix Guillaume Levavasseur Olivier Marti Matthew Menary Catherine Rio Clément Rousset Yona Silvy |
| author_facet |
Juliette Mignot Frédéric Hourdin Julie Deshayes Olivier Boucher Guillaume Gastineau Ionela Musat Martin Vancoppenolle Jérôme Servonnat Arnaud Caubel Frédérique Chéruy Sébastien Denvil Jean‐Louis Dufresne Christian Ethé Laurent Fairhead Marie‐Alice Foujols Jean‐Yves Grandpeix Guillaume Levavasseur Olivier Marti Matthew Menary Catherine Rio Clément Rousset Yona Silvy |
| author_sort |
Juliette Mignot |
| title |
The Tuning Strategy of IPSL‐CM6A‐LR |
| title_short |
The Tuning Strategy of IPSL‐CM6A‐LR |
| title_full |
The Tuning Strategy of IPSL‐CM6A‐LR |
| title_fullStr |
The Tuning Strategy of IPSL‐CM6A‐LR |
| title_full_unstemmed |
The Tuning Strategy of IPSL‐CM6A‐LR |
| title_sort |
tuning strategy of ipsl‐cm6a‐lr |
| publisher |
American Geophysical Union (AGU) |
| publishDate |
2021 |
| url |
https://doaj.org/article/d0feb0d749634f6e8523a8c964ccf73c |
| work_keys_str_mv |
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| _version_ |
1718415826346835968 |