Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements
This work evaluates the IASI CO product against independent in-situ aircraft data from the MOZAIC program and the POLARCAT aircraft campaign. The validation is carried out by analysing the impact of assimilation of eight months of IASI CO columns retrieved for the period of May to December 2008 into...
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Online Access: | https://doi.org/10.5194/acp-12-4493-2012 https://doaj.org/article/eddbffb3b6f34dc29b33c194e4732291 |
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ftdoajarticles:oai:doaj.org/article:eddbffb3b6f34dc29b33c194e4732291 2023-05-15T15:10:47+02:00 Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements A. Klonecki M. Pommier C. Clerbaux G. Ancellet J.-P. Cammas P.-F. Coheur A. Cozic G. S. Diskin J. Hadji-Lazaro D. A. Hauglustaine D. Hurtmans B. Khattatov J.-F. Lamarque K. S. Law P. Nedelec J.-D. Paris J. R. Podolske P. Prunet H. Schlager S. Szopa S. Turquety 2012-05-01T00:00:00Z https://doi.org/10.5194/acp-12-4493-2012 https://doaj.org/article/eddbffb3b6f34dc29b33c194e4732291 EN eng Copernicus Publications http://www.atmos-chem-phys.net/12/4493/2012/acp-12-4493-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-4493-2012 1680-7316 1680-7324 https://doaj.org/article/eddbffb3b6f34dc29b33c194e4732291 Atmospheric Chemistry and Physics, Vol 12, Iss 10, Pp 4493-4512 (2012) Physics QC1-999 Chemistry QD1-999 article 2012 ftdoajarticles https://doi.org/10.5194/acp-12-4493-2012 2022-12-31T00:45:01Z This work evaluates the IASI CO product against independent in-situ aircraft data from the MOZAIC program and the POLARCAT aircraft campaign. The validation is carried out by analysing the impact of assimilation of eight months of IASI CO columns retrieved for the period of May to December 2008 into the global chemistry transport model LMDz-INCA. A modelling system based on a sub-optimal Kalman filter was developed and a specific treatment that takes into account the representativeness of observations at the scale of the model grid is applied to the IASI CO columns and associated errors before their assimilation in the model. Comparisons of the assimilated CO profiles with in situ CO measurements indicate that the assimilation leads to a considerable improvement of the model simulations in the middle troposphere as compared with a control run with no assimilation. Model biases in the simulation of background values are reduced and improvement in the simulation of very high concentrations is observed. The improvement is due to the transport by the model of the information present in the IASI CO retrievals. Our analysis also shows the impact of assimilation of CO on the representation of transport into the Arctic region during the POLARCAT summer campaign. A considerable increase in CO mixing ratios over the Asian source region was observed when assimilation was used leading to much higher values of CO during the cross-pole transport episode. These higher values are in good agreement with data from the POLARCAT flights that sampled this plume. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Inca ENVELOPE(-59.194,-59.194,-62.308,-62.308) Atmospheric Chemistry and Physics 12 10 4493 4512 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 A. Klonecki M. Pommier C. Clerbaux G. Ancellet J.-P. Cammas P.-F. Coheur A. Cozic G. S. Diskin J. Hadji-Lazaro D. A. Hauglustaine D. Hurtmans B. Khattatov J.-F. Lamarque K. S. Law P. Nedelec J.-D. Paris J. R. Podolske P. Prunet H. Schlager S. Szopa S. Turquety Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
This work evaluates the IASI CO product against independent in-situ aircraft data from the MOZAIC program and the POLARCAT aircraft campaign. The validation is carried out by analysing the impact of assimilation of eight months of IASI CO columns retrieved for the period of May to December 2008 into the global chemistry transport model LMDz-INCA. A modelling system based on a sub-optimal Kalman filter was developed and a specific treatment that takes into account the representativeness of observations at the scale of the model grid is applied to the IASI CO columns and associated errors before their assimilation in the model. Comparisons of the assimilated CO profiles with in situ CO measurements indicate that the assimilation leads to a considerable improvement of the model simulations in the middle troposphere as compared with a control run with no assimilation. Model biases in the simulation of background values are reduced and improvement in the simulation of very high concentrations is observed. The improvement is due to the transport by the model of the information present in the IASI CO retrievals. Our analysis also shows the impact of assimilation of CO on the representation of transport into the Arctic region during the POLARCAT summer campaign. A considerable increase in CO mixing ratios over the Asian source region was observed when assimilation was used leading to much higher values of CO during the cross-pole transport episode. These higher values are in good agreement with data from the POLARCAT flights that sampled this plume. |
format |
Article in Journal/Newspaper |
author |
A. Klonecki M. Pommier C. Clerbaux G. Ancellet J.-P. Cammas P.-F. Coheur A. Cozic G. S. Diskin J. Hadji-Lazaro D. A. Hauglustaine D. Hurtmans B. Khattatov J.-F. Lamarque K. S. Law P. Nedelec J.-D. Paris J. R. Podolske P. Prunet H. Schlager S. Szopa S. Turquety |
author_facet |
A. Klonecki M. Pommier C. Clerbaux G. Ancellet J.-P. Cammas P.-F. Coheur A. Cozic G. S. Diskin J. Hadji-Lazaro D. A. Hauglustaine D. Hurtmans B. Khattatov J.-F. Lamarque K. S. Law P. Nedelec J.-D. Paris J. R. Podolske P. Prunet H. Schlager S. Szopa S. Turquety |
author_sort |
A. Klonecki |
title |
Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements |
title_short |
Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements |
title_full |
Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements |
title_fullStr |
Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements |
title_full_unstemmed |
Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements |
title_sort |
assimilation of iasi satellite co fields into a global chemistry transport model for validation against aircraft measurements |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/acp-12-4493-2012 https://doaj.org/article/eddbffb3b6f34dc29b33c194e4732291 |
long_lat |
ENVELOPE(-59.194,-59.194,-62.308,-62.308) |
geographic |
Arctic Inca |
geographic_facet |
Arctic Inca |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 12, Iss 10, Pp 4493-4512 (2012) |
op_relation |
http://www.atmos-chem-phys.net/12/4493/2012/acp-12-4493-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-4493-2012 1680-7316 1680-7324 https://doaj.org/article/eddbffb3b6f34dc29b33c194e4732291 |
op_doi |
https://doi.org/10.5194/acp-12-4493-2012 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
12 |
container_issue |
10 |
container_start_page |
4493 |
op_container_end_page |
4512 |
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1766341742428160000 |