Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions
Improvements are made to two areas of the United Kingdom Chemistry and Aerosol (UKCA) module, which forms part of the Met Office Unified Model (UM) used for weather and climate applications. Firstly, a solar cycle is added to the photolysis scheme. The effect on total column ozone of this addition w...
Published in: | Geoscientific Model Development |
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European Geosciences Union
2019
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Online Access: | http://nora.nerc.ac.uk/id/eprint/521660/ https://nora.nerc.ac.uk/id/eprint/521660/7/gmd-12-1227-2019.pdf https://nora.nerc.ac.uk/id/eprint/521660/1/10.5194_gmd-2018-279.pdf https://www.geosci-model-dev.net/12/1227/2019/ |
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ftnerc:oai:nora.nerc.ac.uk:521660 2023-05-15T13:41:42+02:00 Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions Dennison, Fraser Keeble, James Morgenstern, Olaf Zeng, Guang Abraham, N Luke Yang, Xin 2019-03-29 text http://nora.nerc.ac.uk/id/eprint/521660/ https://nora.nerc.ac.uk/id/eprint/521660/7/gmd-12-1227-2019.pdf https://nora.nerc.ac.uk/id/eprint/521660/1/10.5194_gmd-2018-279.pdf https://www.geosci-model-dev.net/12/1227/2019/ en eng European Geosciences Union https://nora.nerc.ac.uk/id/eprint/521660/7/gmd-12-1227-2019.pdf https://nora.nerc.ac.uk/id/eprint/521660/1/10.5194_gmd-2018-279.pdf Dennison, Fraser; Keeble, James; Morgenstern, Olaf; Zeng, Guang; Abraham, N Luke; Yang, Xin orcid:0000-0002-3838-9758 . 2019 Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions. Geoscientific Model Development, 12 (3). 1227-1239. https://doi.org/10.5194/gmd-12-1227-2019 <https://doi.org/10.5194/gmd-12-1227-2019> cc_by_4 CC-BY Publication - Article PeerReviewed 2019 ftnerc https://doi.org/10.5194/gmd-12-1227-2019 2023-02-04T19:47:27Z Improvements are made to two areas of the United Kingdom Chemistry and Aerosol (UKCA) module, which forms part of the Met Office Unified Model (UM) used for weather and climate applications. Firstly, a solar cycle is added to the photolysis scheme. The effect on total column ozone of this addition was found to be around 1–2% in mid-latitude and equatorial regions in phase with the solar cycle. Secondly, reactions occurring on the surfaces of polar stratospheric clouds and sulfate aerosol are updated and extended by modification of the uptake coefficients of five existing reactions and the addition of a further eight reactions involving bromine species. These modifications are shown to reduce the overabundance of modeled total-column ozone in the Arctic during October to February, southern mid-latitudes during August, and the Antarctic during September. Antarctic springtime ozone depletion is shown to be enhanced by 25 DU on average, which now causes the ozone hole to be somewhat too deep compared to observations. We show that this is in part due to a cold bias of the Antarctic polar vortex in the model. Article in Journal/Newspaper Antarc* Antarctic Arctic Natural Environment Research Council: NERC Open Research Archive Arctic Antarctic The Antarctic Geoscientific Model Development 12 3 1227 1239 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
Improvements are made to two areas of the United Kingdom Chemistry and Aerosol (UKCA) module, which forms part of the Met Office Unified Model (UM) used for weather and climate applications. Firstly, a solar cycle is added to the photolysis scheme. The effect on total column ozone of this addition was found to be around 1–2% in mid-latitude and equatorial regions in phase with the solar cycle. Secondly, reactions occurring on the surfaces of polar stratospheric clouds and sulfate aerosol are updated and extended by modification of the uptake coefficients of five existing reactions and the addition of a further eight reactions involving bromine species. These modifications are shown to reduce the overabundance of modeled total-column ozone in the Arctic during October to February, southern mid-latitudes during August, and the Antarctic during September. Antarctic springtime ozone depletion is shown to be enhanced by 25 DU on average, which now causes the ozone hole to be somewhat too deep compared to observations. We show that this is in part due to a cold bias of the Antarctic polar vortex in the model. |
format |
Article in Journal/Newspaper |
author |
Dennison, Fraser Keeble, James Morgenstern, Olaf Zeng, Guang Abraham, N Luke Yang, Xin |
spellingShingle |
Dennison, Fraser Keeble, James Morgenstern, Olaf Zeng, Guang Abraham, N Luke Yang, Xin Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions |
author_facet |
Dennison, Fraser Keeble, James Morgenstern, Olaf Zeng, Guang Abraham, N Luke Yang, Xin |
author_sort |
Dennison, Fraser |
title |
Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions |
title_short |
Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions |
title_full |
Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions |
title_fullStr |
Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions |
title_full_unstemmed |
Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions |
title_sort |
improvements to stratospheric chemistry scheme in the um-ukca (v10.7) model: solar cycle and heterogeneous reactions |
publisher |
European Geosciences Union |
publishDate |
2019 |
url |
http://nora.nerc.ac.uk/id/eprint/521660/ https://nora.nerc.ac.uk/id/eprint/521660/7/gmd-12-1227-2019.pdf https://nora.nerc.ac.uk/id/eprint/521660/1/10.5194_gmd-2018-279.pdf https://www.geosci-model-dev.net/12/1227/2019/ |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/521660/7/gmd-12-1227-2019.pdf https://nora.nerc.ac.uk/id/eprint/521660/1/10.5194_gmd-2018-279.pdf Dennison, Fraser; Keeble, James; Morgenstern, Olaf; Zeng, Guang; Abraham, N Luke; Yang, Xin orcid:0000-0002-3838-9758 . 2019 Improvements to stratospheric chemistry scheme in the UM-UKCA (v10.7) model: solar cycle and heterogeneous reactions. Geoscientific Model Development, 12 (3). 1227-1239. https://doi.org/10.5194/gmd-12-1227-2019 <https://doi.org/10.5194/gmd-12-1227-2019> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/gmd-12-1227-2019 |
container_title |
Geoscientific Model Development |
container_volume |
12 |
container_issue |
3 |
container_start_page |
1227 |
op_container_end_page |
1239 |
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1766154157231702016 |