Meteorological implementation issues in chemistry and transport models
International audience Offline chemistry and transport models (CTMs) are versatile tools for studying composition and climate issues requiring multi-decadal simulations. They are computationally fast compared to coupled chemistry climate models, making them well-suited for integrating sensitivity ex...
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ftinsu:oai:HAL:hal-00295980v1 2023-11-12T04:03:02+01:00 Meteorological implementation issues in chemistry and transport models Strahan, S. E. Polansky, B. C. University of Maryland Baltimore County (UMBC) University of Maryland System Science Systems and Applications, Inc. Lanham (SSAI) 2006-07-12 https://hal.science/hal-00295980 https://hal.science/hal-00295980/document https://hal.science/hal-00295980/file/acp-6-2895-2006.pdf en eng HAL CCSD European Geosciences Union hal-00295980 https://hal.science/hal-00295980 https://hal.science/hal-00295980/document https://hal.science/hal-00295980/file/acp-6-2895-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00295980 Atmospheric Chemistry and Physics, 2006, 6 (10), pp.2895-2910 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftinsu 2023-10-25T16:29:40Z International audience Offline chemistry and transport models (CTMs) are versatile tools for studying composition and climate issues requiring multi-decadal simulations. They are computationally fast compared to coupled chemistry climate models, making them well-suited for integrating sensitivity experiments necessary for understanding model performance and interpreting results. The archived meteorological fields used by CTMs can be implemented with lower horizontal or vertical resolution than the original meteorological fields in order to shorten integration time, but the effects of these shortcuts on transport processes must be understood if the CTM is to have credibility. In this paper we present a series of sensitivity experiments on a CTM using the Lin and Rood advection scheme, each differing from another by a single feature of the wind field implementation. Transport effects arising from changes in resolution and model lid height are evaluated using process-oriented diagnostics that intercompare CH 4 , O 3 , and age tracer carried in the simulations. Some of the diagnostics used are derived from observations and are shown as a reality check for the model. Processes evaluated include tropical ascent, tropical-midlatitude exchange, poleward circulation in the upper stratosphere, and the development of the Antarctic vortex. We find that faithful representation of stratospheric transport in this CTM is possible with a full mesosphere, ~1 km resolution in the lower stratosphere, and relatively low vertical resolution (>4 km spacing) in the middle stratosphere and above, but lowering the lid from the upper to lower mesosphere leads to less realistic constituent distributions in the upper stratosphere. Ultimately, this affects the polar lower stratosphere, but the effects are greater for the Antarctic than the Arctic. The fidelity of lower stratospheric transport requires realistic tropical and high latitude mixing barriers which are produced at 2°×2.5°, but not lower resolution. At 2°×2.5° resolution, the ... Article in Journal/Newspaper Antarc* Antarctic Arctic Institut national des sciences de l'Univers: HAL-INSU Arctic Antarctic The Antarctic |
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Institut national des sciences de l'Univers: HAL-INSU |
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English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Strahan, S. E. Polansky, B. C. Meteorological implementation issues in chemistry and transport models |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Offline chemistry and transport models (CTMs) are versatile tools for studying composition and climate issues requiring multi-decadal simulations. They are computationally fast compared to coupled chemistry climate models, making them well-suited for integrating sensitivity experiments necessary for understanding model performance and interpreting results. The archived meteorological fields used by CTMs can be implemented with lower horizontal or vertical resolution than the original meteorological fields in order to shorten integration time, but the effects of these shortcuts on transport processes must be understood if the CTM is to have credibility. In this paper we present a series of sensitivity experiments on a CTM using the Lin and Rood advection scheme, each differing from another by a single feature of the wind field implementation. Transport effects arising from changes in resolution and model lid height are evaluated using process-oriented diagnostics that intercompare CH 4 , O 3 , and age tracer carried in the simulations. Some of the diagnostics used are derived from observations and are shown as a reality check for the model. Processes evaluated include tropical ascent, tropical-midlatitude exchange, poleward circulation in the upper stratosphere, and the development of the Antarctic vortex. We find that faithful representation of stratospheric transport in this CTM is possible with a full mesosphere, ~1 km resolution in the lower stratosphere, and relatively low vertical resolution (>4 km spacing) in the middle stratosphere and above, but lowering the lid from the upper to lower mesosphere leads to less realistic constituent distributions in the upper stratosphere. Ultimately, this affects the polar lower stratosphere, but the effects are greater for the Antarctic than the Arctic. The fidelity of lower stratospheric transport requires realistic tropical and high latitude mixing barriers which are produced at 2°×2.5°, but not lower resolution. At 2°×2.5° resolution, the ... |
author2 |
University of Maryland Baltimore County (UMBC) University of Maryland System Science Systems and Applications, Inc. Lanham (SSAI) |
format |
Article in Journal/Newspaper |
author |
Strahan, S. E. Polansky, B. C. |
author_facet |
Strahan, S. E. Polansky, B. C. |
author_sort |
Strahan, S. E. |
title |
Meteorological implementation issues in chemistry and transport models |
title_short |
Meteorological implementation issues in chemistry and transport models |
title_full |
Meteorological implementation issues in chemistry and transport models |
title_fullStr |
Meteorological implementation issues in chemistry and transport models |
title_full_unstemmed |
Meteorological implementation issues in chemistry and transport models |
title_sort |
meteorological implementation issues in chemistry and transport models |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00295980 https://hal.science/hal-00295980/document https://hal.science/hal-00295980/file/acp-6-2895-2006.pdf |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00295980 Atmospheric Chemistry and Physics, 2006, 6 (10), pp.2895-2910 |
op_relation |
hal-00295980 https://hal.science/hal-00295980 https://hal.science/hal-00295980/document https://hal.science/hal-00295980/file/acp-6-2895-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782335910969344000 |