Accommodation coefficient of HOBr on deliquescent sodium bromide aerosol particles
Uptake of HOBr on sea salt aerosol, sea salt brine or ice is believed to be a key process providing a source of photolabile bromine (Br 2 ) and sustaining ozone depletion cycles in the Arctic troposphere. In the present study, uptake of HOBr on sodium bromide (NaBr) aerosol particles was investigate...
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ftdoajarticles:oai:doaj.org/article:24d9f0bdfd6f4ba0addeabd1c82efe8b 2023-05-15T15:04:06+02:00 Accommodation coefficient of HOBr on deliquescent sodium bromide aerosol particles M. Wachsmuth H. W. Gäggeler R. von Glasow M. Ammann 2002-01-01T00:00:00Z https://doaj.org/article/24d9f0bdfd6f4ba0addeabd1c82efe8b EN eng Copernicus Publications http://www.atmos-chem-phys.net/2/121/2002/acp-2-121-2002.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/24d9f0bdfd6f4ba0addeabd1c82efe8b Atmospheric Chemistry and Physics, Vol 2, Iss 2, Pp 121-131 (2002) Physics QC1-999 Chemistry QD1-999 article 2002 ftdoajarticles 2023-01-08T01:37:33Z Uptake of HOBr on sea salt aerosol, sea salt brine or ice is believed to be a key process providing a source of photolabile bromine (Br 2 ) and sustaining ozone depletion cycles in the Arctic troposphere. In the present study, uptake of HOBr on sodium bromide (NaBr) aerosol particles was investigated at an extremely low HOBr concentration of 300 cm -3 using the short-lived radioactive isotopes 83-86 Br. Under these conditions, at maximum one HOBr molecule was taken up per particle. The rate of uptake was clearly limited by the mass accommodation coefficient, which was calculated to be 0.6 ± 0.2. This value is a factor of 10 larger than estimates used in earlier models. The atmospheric implications are discussed using the box model "MOCCA'', showing that the increase of the accommodation coefficient of HOBr by a factor of 10 only slightly affects net ozone loss, but significantly increases chlorine release. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
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language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 M. Wachsmuth H. W. Gäggeler R. von Glasow M. Ammann Accommodation coefficient of HOBr on deliquescent sodium bromide aerosol particles |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Uptake of HOBr on sea salt aerosol, sea salt brine or ice is believed to be a key process providing a source of photolabile bromine (Br 2 ) and sustaining ozone depletion cycles in the Arctic troposphere. In the present study, uptake of HOBr on sodium bromide (NaBr) aerosol particles was investigated at an extremely low HOBr concentration of 300 cm -3 using the short-lived radioactive isotopes 83-86 Br. Under these conditions, at maximum one HOBr molecule was taken up per particle. The rate of uptake was clearly limited by the mass accommodation coefficient, which was calculated to be 0.6 ± 0.2. This value is a factor of 10 larger than estimates used in earlier models. The atmospheric implications are discussed using the box model "MOCCA'', showing that the increase of the accommodation coefficient of HOBr by a factor of 10 only slightly affects net ozone loss, but significantly increases chlorine release. |
format |
Article in Journal/Newspaper |
author |
M. Wachsmuth H. W. Gäggeler R. von Glasow M. Ammann |
author_facet |
M. Wachsmuth H. W. Gäggeler R. von Glasow M. Ammann |
author_sort |
M. Wachsmuth |
title |
Accommodation coefficient of HOBr on deliquescent sodium bromide aerosol particles |
title_short |
Accommodation coefficient of HOBr on deliquescent sodium bromide aerosol particles |
title_full |
Accommodation coefficient of HOBr on deliquescent sodium bromide aerosol particles |
title_fullStr |
Accommodation coefficient of HOBr on deliquescent sodium bromide aerosol particles |
title_full_unstemmed |
Accommodation coefficient of HOBr on deliquescent sodium bromide aerosol particles |
title_sort |
accommodation coefficient of hobr on deliquescent sodium bromide aerosol particles |
publisher |
Copernicus Publications |
publishDate |
2002 |
url |
https://doaj.org/article/24d9f0bdfd6f4ba0addeabd1c82efe8b |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 2, Iss 2, Pp 121-131 (2002) |
op_relation |
http://www.atmos-chem-phys.net/2/121/2002/acp-2-121-2002.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/24d9f0bdfd6f4ba0addeabd1c82efe8b |
_version_ |
1766335913990815744 |