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NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0: Stratospheric Composition
The NASA Goddard Earth Observing System (GEOS) Composition Forecast (GEOS‐CF) provides recent estimates and 5‐day forecasts of atmospheric composition to the public in near‐real time. To do this, the GEOS Earth system model is coupled with the GEOS‐Chem tropospheric‐stratospheric unified chemistry e...
Autores principales: | , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9287101/ https://www.ncbi.nlm.nih.gov/pubmed/35864944 http://dx.doi.org/10.1029/2021MS002852 |
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author | Knowland, K. E. Keller, C. A. Wales, P. A. Wargan, K. Coy, L. Johnson, M. S. Liu, J. Lucchesi, R. A. Eastham, S. D. Fleming, E. Liang, Q. Leblanc, T. Livesey, N. J. Walker, K. A. Ott, L. E. Pawson, S. |
author_facet | Knowland, K. E. Keller, C. A. Wales, P. A. Wargan, K. Coy, L. Johnson, M. S. Liu, J. Lucchesi, R. A. Eastham, S. D. Fleming, E. Liang, Q. Leblanc, T. Livesey, N. J. Walker, K. A. Ott, L. E. Pawson, S. |
author_sort | Knowland, K. E. |
collection | PubMed |
description | The NASA Goddard Earth Observing System (GEOS) Composition Forecast (GEOS‐CF) provides recent estimates and 5‐day forecasts of atmospheric composition to the public in near‐real time. To do this, the GEOS Earth system model is coupled with the GEOS‐Chem tropospheric‐stratospheric unified chemistry extension (UCX) to represent composition from the surface to the top of the GEOS atmosphere (0.01 hPa). The GEOS‐CF system is described, including updates made to the GEOS‐Chem UCX mechanism within GEOS‐CF for improved representation of stratospheric chemistry. Comparisons are made against balloon, lidar, and satellite observations for stratospheric composition, including measurements of ozone (O(3)) and important nitrogen and chlorine species related to stratospheric O(3) recovery. The GEOS‐CF nudges the stratospheric O(3) toward the GEOS Forward Processing (GEOS FP) assimilated O(3) product; as a result the stratospheric O(3) in the GEOS‐CF historical estimate agrees well with observations. During abnormal dynamical and chemical environments such as the 2020 polar vortexes, the GEOS‐CF O(3) forecasts are more realistic than GEOS FP O(3) forecasts because of the inclusion of the complex GEOS‐Chem UCX stratospheric chemistry. Overall, the spatial patterns of the GEOS‐CF simulated concentrations of stratospheric composition agree well with satellite observations. However, there are notable biases—such as low NO( x ) and HNO(3) in the polar regions and generally low HCl throughout the stratosphere—and future improvements to the chemistry mechanism and emissions are discussed. GEOS‐CF is a new tool for the research community and instrument teams observing trace gases in the stratosphere and troposphere, providing near‐real‐time three‐dimensional gridded information on atmospheric composition. |
format | Online Article Text |
id | pubmed-9287101 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-92871012022-07-19 NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0: Stratospheric Composition Knowland, K. E. Keller, C. A. Wales, P. A. Wargan, K. Coy, L. Johnson, M. S. Liu, J. Lucchesi, R. A. Eastham, S. D. Fleming, E. Liang, Q. Leblanc, T. Livesey, N. J. Walker, K. A. Ott, L. E. Pawson, S. J Adv Model Earth Syst Research Article The NASA Goddard Earth Observing System (GEOS) Composition Forecast (GEOS‐CF) provides recent estimates and 5‐day forecasts of atmospheric composition to the public in near‐real time. To do this, the GEOS Earth system model is coupled with the GEOS‐Chem tropospheric‐stratospheric unified chemistry extension (UCX) to represent composition from the surface to the top of the GEOS atmosphere (0.01 hPa). The GEOS‐CF system is described, including updates made to the GEOS‐Chem UCX mechanism within GEOS‐CF for improved representation of stratospheric chemistry. Comparisons are made against balloon, lidar, and satellite observations for stratospheric composition, including measurements of ozone (O(3)) and important nitrogen and chlorine species related to stratospheric O(3) recovery. The GEOS‐CF nudges the stratospheric O(3) toward the GEOS Forward Processing (GEOS FP) assimilated O(3) product; as a result the stratospheric O(3) in the GEOS‐CF historical estimate agrees well with observations. During abnormal dynamical and chemical environments such as the 2020 polar vortexes, the GEOS‐CF O(3) forecasts are more realistic than GEOS FP O(3) forecasts because of the inclusion of the complex GEOS‐Chem UCX stratospheric chemistry. Overall, the spatial patterns of the GEOS‐CF simulated concentrations of stratospheric composition agree well with satellite observations. However, there are notable biases—such as low NO( x ) and HNO(3) in the polar regions and generally low HCl throughout the stratosphere—and future improvements to the chemistry mechanism and emissions are discussed. GEOS‐CF is a new tool for the research community and instrument teams observing trace gases in the stratosphere and troposphere, providing near‐real‐time three‐dimensional gridded information on atmospheric composition. John Wiley and Sons Inc. 2022-06-07 2022-06 /pmc/articles/PMC9287101/ /pubmed/35864944 http://dx.doi.org/10.1029/2021MS002852 Text en © 2022 The Authors. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | Research Article Knowland, K. E. Keller, C. A. Wales, P. A. Wargan, K. Coy, L. Johnson, M. S. Liu, J. Lucchesi, R. A. Eastham, S. D. Fleming, E. Liang, Q. Leblanc, T. Livesey, N. J. Walker, K. A. Ott, L. E. Pawson, S. NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0: Stratospheric Composition |
title | NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0: Stratospheric Composition |
title_full | NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0: Stratospheric Composition |
title_fullStr | NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0: Stratospheric Composition |
title_full_unstemmed | NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0: Stratospheric Composition |
title_short | NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0: Stratospheric Composition |
title_sort | nasa geos composition forecast modeling system geos‐cf v1.0: stratospheric composition |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9287101/ https://www.ncbi.nlm.nih.gov/pubmed/35864944 http://dx.doi.org/10.1029/2021MS002852 |
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