A new version of the CNRM Chemistry-Climate Model, CNRM-CCM: description and improvements from the CCMVal-2 simulations
This paper presents a new version of the Météo-France CNRM Chemistry-Climate Model, so-called CNRM-CCM. It includes some fundamental changes from the previous version (CNRM-ACM) which was extensively evaluated in the context of the CCMVal-2 validation activity. The most notable changes concern...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2011-10-01
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| Series: | Geoscientific Model Development |
| Online Access: | http://www.geosci-model-dev.net/4/873/2011/gmd-4-873-2011.pdf |
| _version_ | 1828391715832070144 |
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| author | M. Michou D. Saint-Martin H. Teyssèdre A. Alias F. Karcher D. Olivié A. Voldoire B. Josse V.-H. Peuch H. Clark J. N. Lee F. Chéroux |
| author_facet | M. Michou D. Saint-Martin H. Teyssèdre A. Alias F. Karcher D. Olivié A. Voldoire B. Josse V.-H. Peuch H. Clark J. N. Lee F. Chéroux |
| author_sort | M. Michou |
| collection | DOAJ |
| description | This paper presents a new version of the Météo-France CNRM Chemistry-Climate Model, so-called CNRM-CCM. It includes some fundamental changes from the previous version (CNRM-ACM) which was extensively evaluated in the context of the CCMVal-2 validation activity. The most notable changes concern the radiative code of the GCM, and the inclusion of the detailed stratospheric chemistry of our Chemistry-Transport model MOCAGE on-line within the GCM. A 47-yr transient simulation (1960–2006) is the basis of our analysis. CNRM-CCM generates satisfactory dynamical and chemical fields in the stratosphere. Several shortcomings of CNRM-ACM simulations for CCMVal-2 that resulted from an erroneous representation of the impact of volcanic aerosols as well as from transport deficiencies have been eliminated. <br><br> Remaining problems concern the upper stratosphere (5 to 1 hPa) where temperatures are too high, and where there are biases in the NO<sub>2</sub>, N<sub>2</sub>O<sub>5</sub> and O<sub>3</sub> mixing ratios. In contrast, temperatures at the tropical tropopause are too cold. These issues are addressed through the implementation of a more accurate radiation scheme at short wavelengths. Despite these problems we show that this new CNRM CCM is a useful tool to study chemistry-climate applications. |
| first_indexed | 2024-12-10T07:07:03Z |
| format | Article |
| id | doaj.art-0dcc2708f85e4e07a7ad4c7f7cdb6506 |
| institution | Directory Open Access Journal |
| issn | 1991-959X 1991-9603 |
| language | English |
| last_indexed | 2024-12-10T07:07:03Z |
| publishDate | 2011-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Geoscientific Model Development |
| spelling | doaj.art-0dcc2708f85e4e07a7ad4c7f7cdb65062022-12-22T01:58:09ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032011-10-014487390010.5194/gmd-4-873-2011A new version of the CNRM Chemistry-Climate Model, CNRM-CCM: description and improvements from the CCMVal-2 simulationsM. MichouD. Saint-MartinH. TeyssèdreA. AliasF. KarcherD. OliviéA. VoldoireB. JosseV.-H. PeuchH. ClarkJ. N. LeeF. ChérouxThis paper presents a new version of the Météo-France CNRM Chemistry-Climate Model, so-called CNRM-CCM. It includes some fundamental changes from the previous version (CNRM-ACM) which was extensively evaluated in the context of the CCMVal-2 validation activity. The most notable changes concern the radiative code of the GCM, and the inclusion of the detailed stratospheric chemistry of our Chemistry-Transport model MOCAGE on-line within the GCM. A 47-yr transient simulation (1960–2006) is the basis of our analysis. CNRM-CCM generates satisfactory dynamical and chemical fields in the stratosphere. Several shortcomings of CNRM-ACM simulations for CCMVal-2 that resulted from an erroneous representation of the impact of volcanic aerosols as well as from transport deficiencies have been eliminated. <br><br> Remaining problems concern the upper stratosphere (5 to 1 hPa) where temperatures are too high, and where there are biases in the NO<sub>2</sub>, N<sub>2</sub>O<sub>5</sub> and O<sub>3</sub> mixing ratios. In contrast, temperatures at the tropical tropopause are too cold. These issues are addressed through the implementation of a more accurate radiation scheme at short wavelengths. Despite these problems we show that this new CNRM CCM is a useful tool to study chemistry-climate applications.http://www.geosci-model-dev.net/4/873/2011/gmd-4-873-2011.pdf |
| spellingShingle | M. Michou D. Saint-Martin H. Teyssèdre A. Alias F. Karcher D. Olivié A. Voldoire B. Josse V.-H. Peuch H. Clark J. N. Lee F. Chéroux A new version of the CNRM Chemistry-Climate Model, CNRM-CCM: description and improvements from the CCMVal-2 simulations Geoscientific Model Development |
| title | A new version of the CNRM Chemistry-Climate Model, CNRM-CCM: description and improvements from the CCMVal-2 simulations |
| title_full | A new version of the CNRM Chemistry-Climate Model, CNRM-CCM: description and improvements from the CCMVal-2 simulations |
| title_fullStr | A new version of the CNRM Chemistry-Climate Model, CNRM-CCM: description and improvements from the CCMVal-2 simulations |
| title_full_unstemmed | A new version of the CNRM Chemistry-Climate Model, CNRM-CCM: description and improvements from the CCMVal-2 simulations |
| title_short | A new version of the CNRM Chemistry-Climate Model, CNRM-CCM: description and improvements from the CCMVal-2 simulations |
| title_sort | new version of the cnrm chemistry climate model cnrm ccm description and improvements from the ccmval 2 simulations |
| url | http://www.geosci-model-dev.net/4/873/2011/gmd-4-873-2011.pdf |
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