Polar boundary layer bromine explosion and ozone depletion events in the chemistry–climate model EMAC v2.52: implementation and evaluation of AirSnow algorithm
Ozone depletion events (ODEs) in the polar boundary layer have been observed frequently during springtime. They are related to events of boundary layer enhancement of bromine. Consequently, increased amounts of boundary layer volume mixing ratio (VMR) and vertical column densities (VCDs) of BrO have...
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Copernicus Publications
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ftdoajarticles:oai:doaj.org/article:31bebd39b6f349ee91db80ca8e27f5c1 2023-05-15T13:56:24+02:00 Polar boundary layer bromine explosion and ozone depletion events in the chemistry–climate model EMAC v2.52: implementation and evaluation of AirSnow algorithm S. Falk B.-M. Sinnhuber 2018-03-01T00:00:00Z https://doi.org/10.5194/gmd-11-1115-2018 https://doaj.org/article/31bebd39b6f349ee91db80ca8e27f5c1 EN eng Copernicus Publications https://www.geosci-model-dev.net/11/1115/2018/gmd-11-1115-2018.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-11-1115-2018 1991-959X 1991-9603 https://doaj.org/article/31bebd39b6f349ee91db80ca8e27f5c1 Geoscientific Model Development, Vol 11, Pp 1115-1131 (2018) Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.5194/gmd-11-1115-2018 2022-12-31T11:14:10Z Ozone depletion events (ODEs) in the polar boundary layer have been observed frequently during springtime. They are related to events of boundary layer enhancement of bromine. Consequently, increased amounts of boundary layer volume mixing ratio (VMR) and vertical column densities (VCDs) of BrO have been observed by in situ observation, ground-based as well as airborne remote sensing, and from satellites. These so-called bromine explosion (BE) events have been discussed serving as a source of tropospheric BrO at high latitudes, which has been underestimated in global models so far. We have implemented a treatment of bromine release and recycling on sea-ice- and snow-covered surfaces in the global chemistry–climate model EMAC (ECHAM/MESSy Atmospheric Chemistry) based on the scheme of Toyota et al. (2011). In this scheme, dry deposition fluxes of HBr, HOBr, and BrNO 3 over ice- and snow-covered surfaces are recycled into Br 2 fluxes. In addition, dry deposition of O 3 , dependent on temperature and sunlight, triggers a Br 2 release from surfaces associated with first-year sea ice. Many aspects of observed bromine enhancements and associated episodes of near-complete depletion of boundary layer ozone, both in the Arctic and in the Antarctic, are reproduced by this relatively simple approach. We present first results from our global model studies extending over a full annual cycle, including comparisons with Global Ozone Monitoring Experiment (GOME) satellite BrO VCDs and surface ozone observations. Article in Journal/Newspaper Antarc* Antarctic Arctic Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Antarctic The Antarctic Geoscientific Model Development 11 3 1115 1131 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 S. Falk B.-M. Sinnhuber Polar boundary layer bromine explosion and ozone depletion events in the chemistry–climate model EMAC v2.52: implementation and evaluation of AirSnow algorithm |
topic_facet |
Geology QE1-996.5 |
description |
Ozone depletion events (ODEs) in the polar boundary layer have been observed frequently during springtime. They are related to events of boundary layer enhancement of bromine. Consequently, increased amounts of boundary layer volume mixing ratio (VMR) and vertical column densities (VCDs) of BrO have been observed by in situ observation, ground-based as well as airborne remote sensing, and from satellites. These so-called bromine explosion (BE) events have been discussed serving as a source of tropospheric BrO at high latitudes, which has been underestimated in global models so far. We have implemented a treatment of bromine release and recycling on sea-ice- and snow-covered surfaces in the global chemistry–climate model EMAC (ECHAM/MESSy Atmospheric Chemistry) based on the scheme of Toyota et al. (2011). In this scheme, dry deposition fluxes of HBr, HOBr, and BrNO 3 over ice- and snow-covered surfaces are recycled into Br 2 fluxes. In addition, dry deposition of O 3 , dependent on temperature and sunlight, triggers a Br 2 release from surfaces associated with first-year sea ice. Many aspects of observed bromine enhancements and associated episodes of near-complete depletion of boundary layer ozone, both in the Arctic and in the Antarctic, are reproduced by this relatively simple approach. We present first results from our global model studies extending over a full annual cycle, including comparisons with Global Ozone Monitoring Experiment (GOME) satellite BrO VCDs and surface ozone observations. |
format |
Article in Journal/Newspaper |
author |
S. Falk B.-M. Sinnhuber |
author_facet |
S. Falk B.-M. Sinnhuber |
author_sort |
S. Falk |
title |
Polar boundary layer bromine explosion and ozone depletion events in the chemistry–climate model EMAC v2.52: implementation and evaluation of AirSnow algorithm |
title_short |
Polar boundary layer bromine explosion and ozone depletion events in the chemistry–climate model EMAC v2.52: implementation and evaluation of AirSnow algorithm |
title_full |
Polar boundary layer bromine explosion and ozone depletion events in the chemistry–climate model EMAC v2.52: implementation and evaluation of AirSnow algorithm |
title_fullStr |
Polar boundary layer bromine explosion and ozone depletion events in the chemistry–climate model EMAC v2.52: implementation and evaluation of AirSnow algorithm |
title_full_unstemmed |
Polar boundary layer bromine explosion and ozone depletion events in the chemistry–climate model EMAC v2.52: implementation and evaluation of AirSnow algorithm |
title_sort |
polar boundary layer bromine explosion and ozone depletion events in the chemistry–climate model emac v2.52: implementation and evaluation of airsnow algorithm |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/gmd-11-1115-2018 https://doaj.org/article/31bebd39b6f349ee91db80ca8e27f5c1 |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
Antarc* Antarctic Arctic Sea ice |
genre_facet |
Antarc* Antarctic Arctic Sea ice |
op_source |
Geoscientific Model Development, Vol 11, Pp 1115-1131 (2018) |
op_relation |
https://www.geosci-model-dev.net/11/1115/2018/gmd-11-1115-2018.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-11-1115-2018 1991-959X 1991-9603 https://doaj.org/article/31bebd39b6f349ee91db80ca8e27f5c1 |
op_doi |
https://doi.org/10.5194/gmd-11-1115-2018 |
container_title |
Geoscientific Model Development |
container_volume |
11 |
container_issue |
3 |
container_start_page |
1115 |
op_container_end_page |
1131 |
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1766263901384605696 |