Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations: Reactive gases
The Copernicus Atmosphere Monitoring Service (CAMS) is operationally providing forecast and reanalysis products of air quality and atmospheric composition. In this article, we present an extended evaluation of the CAMS global reanalysis data set of four reactive gases, namely, ozone (O-3), carbon mo...
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ftpubman:oai:pure.mpg.de:item_3331927 2023-08-27T04:04:21+02:00 Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations: Reactive gases Wagner , A. Bennouna, Y. Blechschmidt, A. Brasseur, G. Chabrillat, S. Christophe, Y. Errera, Q. Eskes, H. Flemming, J. Hansen, K. Inness, A. Kapsomenakis, J. Langerock, B. Richter, A. Sudarchikova, N. Thouret, V. Zerefos, C. 2021-05 application/pdf http://hdl.handle.net/21.11116/0000-0008-E70F-4 http://hdl.handle.net/21.11116/0000-0008-E711-0 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1525/elementa.2020.00171 http://hdl.handle.net/21.11116/0000-0008-E70F-4 http://hdl.handle.net/21.11116/0000-0008-E711-0 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Elementa: Science of the Anthropocene info:eu-repo/semantics/article 2021 ftpubman https://doi.org/10.1525/elementa.2020.00171 2023-08-02T01:45:23Z The Copernicus Atmosphere Monitoring Service (CAMS) is operationally providing forecast and reanalysis products of air quality and atmospheric composition. In this article, we present an extended evaluation of the CAMS global reanalysis data set of four reactive gases, namely, ozone (O-3), carbon monoxide (CO), nitrogen dioxide (NO2), and formaldehyde (HCHO), using multiple independent observations. Our results show that the CAMS model system mostly provides a stable and accurate representation of the global distribution of reactive gases over time. Our findings highlight the crucial impact of satellite data assimilation and emissions, investigated through comparison with a model run without assimilated data. Stratospheric and tropospheric O-3 are mostly well constrained by the data assimilation, except over Antarctica after 2012/2013 due to changes in the assimilated data. Challenges remain for O-3 in the Tropics and high-latitude regions during winter and spring. At the surface and for short-lived species (NO2), data assimilation is less effective. Total column CO in the CAMS reanalysis is well constrained by the assimilated satellite data. The control run, however, shows large overestimations of total column CO in the Southern Hemisphere and larger year-to-year variability in all regions. Concerning the long-term stability of the CAMS model, we note drifts in the time series of biases for surface O-3 and CO in the Northern midlatitudes and Tropics and for NO2 over East Asia, which point to biased emissions. Compared to the previous Monitoring Atmospheric Composition and Climate reanalysis, changes in the CAMS chemistry module and assimilation system helped to reduce biases and enhance the long-term temporal consistency of model results for the CAMS reanalysis. Article in Journal/Newspaper Antarc* Antarctica Max Planck Society: MPG.PuRe Elementa: Science of the Anthropocene 9 1 |
institution |
Open Polar |
collection |
Max Planck Society: MPG.PuRe |
op_collection_id |
ftpubman |
language |
English |
description |
The Copernicus Atmosphere Monitoring Service (CAMS) is operationally providing forecast and reanalysis products of air quality and atmospheric composition. In this article, we present an extended evaluation of the CAMS global reanalysis data set of four reactive gases, namely, ozone (O-3), carbon monoxide (CO), nitrogen dioxide (NO2), and formaldehyde (HCHO), using multiple independent observations. Our results show that the CAMS model system mostly provides a stable and accurate representation of the global distribution of reactive gases over time. Our findings highlight the crucial impact of satellite data assimilation and emissions, investigated through comparison with a model run without assimilated data. Stratospheric and tropospheric O-3 are mostly well constrained by the data assimilation, except over Antarctica after 2012/2013 due to changes in the assimilated data. Challenges remain for O-3 in the Tropics and high-latitude regions during winter and spring. At the surface and for short-lived species (NO2), data assimilation is less effective. Total column CO in the CAMS reanalysis is well constrained by the assimilated satellite data. The control run, however, shows large overestimations of total column CO in the Southern Hemisphere and larger year-to-year variability in all regions. Concerning the long-term stability of the CAMS model, we note drifts in the time series of biases for surface O-3 and CO in the Northern midlatitudes and Tropics and for NO2 over East Asia, which point to biased emissions. Compared to the previous Monitoring Atmospheric Composition and Climate reanalysis, changes in the CAMS chemistry module and assimilation system helped to reduce biases and enhance the long-term temporal consistency of model results for the CAMS reanalysis. |
format |
Article in Journal/Newspaper |
author |
Wagner , A. Bennouna, Y. Blechschmidt, A. Brasseur, G. Chabrillat, S. Christophe, Y. Errera, Q. Eskes, H. Flemming, J. Hansen, K. Inness, A. Kapsomenakis, J. Langerock, B. Richter, A. Sudarchikova, N. Thouret, V. Zerefos, C. |
spellingShingle |
Wagner , A. Bennouna, Y. Blechschmidt, A. Brasseur, G. Chabrillat, S. Christophe, Y. Errera, Q. Eskes, H. Flemming, J. Hansen, K. Inness, A. Kapsomenakis, J. Langerock, B. Richter, A. Sudarchikova, N. Thouret, V. Zerefos, C. Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations: Reactive gases |
author_facet |
Wagner , A. Bennouna, Y. Blechschmidt, A. Brasseur, G. Chabrillat, S. Christophe, Y. Errera, Q. Eskes, H. Flemming, J. Hansen, K. Inness, A. Kapsomenakis, J. Langerock, B. Richter, A. Sudarchikova, N. Thouret, V. Zerefos, C. |
author_sort |
Wagner , A. |
title |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations: Reactive gases |
title_short |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations: Reactive gases |
title_full |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations: Reactive gases |
title_fullStr |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations: Reactive gases |
title_full_unstemmed |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations: Reactive gases |
title_sort |
comprehensive evaluation of the copernicus atmosphere monitoring service (cams) reanalysis against independent observations: reactive gases |
publishDate |
2021 |
url |
http://hdl.handle.net/21.11116/0000-0008-E70F-4 http://hdl.handle.net/21.11116/0000-0008-E711-0 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Elementa: Science of the Anthropocene |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1525/elementa.2020.00171 http://hdl.handle.net/21.11116/0000-0008-E70F-4 http://hdl.handle.net/21.11116/0000-0008-E711-0 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1525/elementa.2020.00171 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
9 |
container_issue |
1 |
_version_ |
1775350772120158208 |