Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations
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 (O3), carbon mon...
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Online Access: | http://dx.doi.org/10.1525/elementa.2020.00171 http://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.2020.00171/463928/elementa.2020.00171.pdf |
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crunicaliforniap:10.1525/elementa.2020.00171 2024-09-30T14:24:43+00:00 Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations Wagner, Annette Bennouna, Y. Blechschmidt, A.-M. Brasseur, G. Chabrillat, S. Christophe, Y. Errera, Q. Eskes, H. Flemming, J. Hansen, K. M. Inness, A. Kapsomenakis, J. Langerock, B. Richter, A. Sudarchikova, N. Thouret, V. Zerefos, C. 2021 http://dx.doi.org/10.1525/elementa.2020.00171 http://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.2020.00171/463928/elementa.2020.00171.pdf en eng University of California Press http://creativecommons.org/licenses/by/4.0/ Elementa: Science of the Anthropocene volume 9, issue 1 ISSN 2325-1026 journal-article 2021 crunicaliforniap https://doi.org/10.1525/elementa.2020.00171 2024-09-05T05:01:58Z 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 (O3), 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 O3 are mostly well constrained by the data assimilation, except over Antarctica after 2012/2013 due to changes in the assimilated data. Challenges remain for O3 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 O3 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 University of California Press Elementa: Science of the Anthropocene 9 1 |
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Open Polar |
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University of California Press |
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crunicaliforniap |
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 (O3), 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 O3 are mostly well constrained by the data assimilation, except over Antarctica after 2012/2013 due to changes in the assimilated data. Challenges remain for O3 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 O3 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, Annette Bennouna, Y. Blechschmidt, A.-M. Brasseur, G. Chabrillat, S. Christophe, Y. Errera, Q. Eskes, H. Flemming, J. Hansen, K. M. Inness, A. Kapsomenakis, J. Langerock, B. Richter, A. Sudarchikova, N. Thouret, V. Zerefos, C. |
spellingShingle |
Wagner, Annette Bennouna, Y. Blechschmidt, A.-M. Brasseur, G. Chabrillat, S. Christophe, Y. Errera, Q. Eskes, H. Flemming, J. Hansen, K. M. 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 |
author_facet |
Wagner, Annette Bennouna, Y. Blechschmidt, A.-M. Brasseur, G. Chabrillat, S. Christophe, Y. Errera, Q. Eskes, H. Flemming, J. Hansen, K. M. Inness, A. Kapsomenakis, J. Langerock, B. Richter, A. Sudarchikova, N. Thouret, V. Zerefos, C. |
author_sort |
Wagner, Annette |
title |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations |
title_short |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations |
title_full |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations |
title_fullStr |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations |
title_full_unstemmed |
Comprehensive evaluation of the Copernicus Atmosphere Monitoring Service (CAMS) reanalysis against independent observations |
title_sort |
comprehensive evaluation of the copernicus atmosphere monitoring service (cams) reanalysis against independent observations |
publisher |
University of California Press |
publishDate |
2021 |
url |
http://dx.doi.org/10.1525/elementa.2020.00171 http://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.2020.00171/463928/elementa.2020.00171.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Elementa: Science of the Anthropocene volume 9, issue 1 ISSN 2325-1026 |
op_rights |
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_ |
1811642032953753600 |