© Author(s) 2007. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics Observations of OH and HO2 radicals in coastal Antarctica
Abstract. OH and HO2 radical concentrations have been measured in the boundary layer of coastal Antarctica for a six-week period during the austral summer of 2005. The measurements were performed at the British Antarctic Sur-vey’s Halley Research Station (75 ◦ 35 ′ S, 26 ◦ 19′W), using the technique...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.490.1950 2023-05-15T13:45:37+02:00 © Author(s) 2007. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics Observations of OH and HO2 radicals in coastal Antarctica W. J. Bloss J. D. Lee D. E. Heard R. A. Salmon S. J. -b. Bauguitte H. K. Roscoe A. E. Jones The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.1950 http://www.atmos-chem-phys.net/7/4171/2007/acp-7-4171-2007.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.1950 http://www.atmos-chem-phys.net/7/4171/2007/acp-7-4171-2007.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.atmos-chem-phys.net/7/4171/2007/acp-7-4171-2007.pdf text 2007 ftciteseerx 2016-01-08T08:27:58Z Abstract. OH and HO2 radical concentrations have been measured in the boundary layer of coastal Antarctica for a six-week period during the austral summer of 2005. The measurements were performed at the British Antarctic Sur-vey’s Halley Research Station (75 ◦ 35 ′ S, 26 ◦ 19′W), using the technique of on-resonance laser-induced fluorescence to detect OH, with HO2 measured following chemical conver-sion through addition of NO. The mean radical levels were 3.9×105 molecule cm−3 for OH, and 0.76 ppt for HO2 (ppt denotes parts per trillion, by volume). Typical maximum (local noontime) levels were 7.9×105 molecule cm−3 and 1.50 ppt for OH and HO2 respectively. The main sources of HOx were photolysis of O3 and HCHO, with potentially im-portant but uncertain contributions from HONO and higher aldehydes. Of the measured OH sinks, reaction with CO and CH4 dominated, however comparison of the observed OH concentrations with those calculated via the steady state approximation indicated that additional co-reactants were likely to have been present. Elevated levels of NOx resulting from snowpack photochemistry contributed to HOx cycling and enhanced levels of OH, however the halogen oxides IO and BrO dominated the CH3O2 – HO2 – OH conversion in this environment, with associated ozone destruction. 1 Text Antarc* Antarctic Antarctica Unknown Antarctic Austral Sion ENVELOPE(13.758,13.758,66.844,66.844) Halley Research Station ENVELOPE(-26.209,-26.209,-75.605,-75.605) |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
Abstract. OH and HO2 radical concentrations have been measured in the boundary layer of coastal Antarctica for a six-week period during the austral summer of 2005. The measurements were performed at the British Antarctic Sur-vey’s Halley Research Station (75 ◦ 35 ′ S, 26 ◦ 19′W), using the technique of on-resonance laser-induced fluorescence to detect OH, with HO2 measured following chemical conver-sion through addition of NO. The mean radical levels were 3.9×105 molecule cm−3 for OH, and 0.76 ppt for HO2 (ppt denotes parts per trillion, by volume). Typical maximum (local noontime) levels were 7.9×105 molecule cm−3 and 1.50 ppt for OH and HO2 respectively. The main sources of HOx were photolysis of O3 and HCHO, with potentially im-portant but uncertain contributions from HONO and higher aldehydes. Of the measured OH sinks, reaction with CO and CH4 dominated, however comparison of the observed OH concentrations with those calculated via the steady state approximation indicated that additional co-reactants were likely to have been present. Elevated levels of NOx resulting from snowpack photochemistry contributed to HOx cycling and enhanced levels of OH, however the halogen oxides IO and BrO dominated the CH3O2 – HO2 – OH conversion in this environment, with associated ozone destruction. 1 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
W. J. Bloss J. D. Lee D. E. Heard R. A. Salmon S. J. -b. Bauguitte H. K. Roscoe A. E. Jones |
spellingShingle |
W. J. Bloss J. D. Lee D. E. Heard R. A. Salmon S. J. -b. Bauguitte H. K. Roscoe A. E. Jones © Author(s) 2007. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics Observations of OH and HO2 radicals in coastal Antarctica |
author_facet |
W. J. Bloss J. D. Lee D. E. Heard R. A. Salmon S. J. -b. Bauguitte H. K. Roscoe A. E. Jones |
author_sort |
W. J. Bloss |
title |
© Author(s) 2007. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics Observations of OH and HO2 radicals in coastal Antarctica |
title_short |
© Author(s) 2007. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics Observations of OH and HO2 radicals in coastal Antarctica |
title_full |
© Author(s) 2007. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics Observations of OH and HO2 radicals in coastal Antarctica |
title_fullStr |
© Author(s) 2007. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics Observations of OH and HO2 radicals in coastal Antarctica |
title_full_unstemmed |
© Author(s) 2007. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics Observations of OH and HO2 radicals in coastal Antarctica |
title_sort |
© author(s) 2007. this work is licensed under a creative commons license. atmospheric chemistry and physics observations of oh and ho2 radicals in coastal antarctica |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.1950 http://www.atmos-chem-phys.net/7/4171/2007/acp-7-4171-2007.pdf |
long_lat |
ENVELOPE(13.758,13.758,66.844,66.844) ENVELOPE(-26.209,-26.209,-75.605,-75.605) |
geographic |
Antarctic Austral Sion Halley Research Station |
geographic_facet |
Antarctic Austral Sion Halley Research Station |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
http://www.atmos-chem-phys.net/7/4171/2007/acp-7-4171-2007.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.1950 http://www.atmos-chem-phys.net/7/4171/2007/acp-7-4171-2007.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766228622026211328 |