Bromine and Surface Ozone Atmospheric Chemistry at Barrow, Alaska During Spring 1989
Measurements were made of surface ozone, particulate bromine and organic gaseous bromine species at Barrow, Alaska during March and April 1989 with a view to examining the causes of surface ozone destruction during the arctic spring. It was found that during major ozone depletion events (03 < 25...
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ftdtic:ADP007367 2023-05-15T14:57:50+02:00 Bromine and Surface Ozone Atmospheric Chemistry at Barrow, Alaska During Spring 1989 Sturges, W. T. Schnell, R. C. Landsberger, S. COLORADO UNIV AT BOULDER 1992-03 text/html http://www.dtic.mil/docs/citations/ADP007367 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007367 en eng http://www.dtic.mil/docs/citations/ADP007367 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Geography Geology Geochemistry and Mineralogy Atmospheric Physics *BROMINE *OZONE *SURFACES *ATMOSPHERIC CHEMISTRY *SPRING SEASON AIR ALASKA CHAMBERS DEPLETION DESTRUCTION LATITUDE MEASUREMENT PARTICULATES PHASE PHOTOLYSIS PRODUCTION PRODUCTION RATE RADIATION RATES RODS SEASONS SYMPOSIA ARCTIC REGIONS GASES PHOTOCHEMICAL REACTIONS Component Reports *Barrow Ozone depletion Bromoform Dibromochloromethane Actinic radiation Heterogenous reactions Text 1992 ftdtic 2016-02-21T20:31:20Z Measurements were made of surface ozone, particulate bromine and organic gaseous bromine species at Barrow, Alaska during March and April 1989 with a view to examining the causes of surface ozone destruction during the arctic spring. It was found that during major ozone depletion events (03 < 25 ppbv) concentrations of particulate bromine and the organic brominated gases bromoform and dibromo-chloromethane were elevated. A fast production rate of particulate bromine was shown by irradiating ambient nighttime air at Barrow in a chamber with actinic radiation that simulated midday conditions for that season and latitude. Such rapid reactions are not in keeping with gas phase photolysis of bromoform, but further studies showed evidence for a substantial fraction of organic bromine in the particulate phase, thus heterogenous reactions may be important. This article is from 'Proceedings of the International Conference on the Role of Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 1990. Volume 2', AD-A253 028, p751-755. See also Volume 1, AD-A253 027. Text Arctic Barrow Alaska Defense Technical Information Center: DTIC Technical Reports database Arctic Fairbanks |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Geography Geology Geochemistry and Mineralogy Atmospheric Physics *BROMINE *OZONE *SURFACES *ATMOSPHERIC CHEMISTRY *SPRING SEASON AIR ALASKA CHAMBERS DEPLETION DESTRUCTION LATITUDE MEASUREMENT PARTICULATES PHASE PHOTOLYSIS PRODUCTION PRODUCTION RATE RADIATION RATES RODS SEASONS SYMPOSIA ARCTIC REGIONS GASES PHOTOCHEMICAL REACTIONS Component Reports *Barrow Ozone depletion Bromoform Dibromochloromethane Actinic radiation Heterogenous reactions |
spellingShingle |
Geography Geology Geochemistry and Mineralogy Atmospheric Physics *BROMINE *OZONE *SURFACES *ATMOSPHERIC CHEMISTRY *SPRING SEASON AIR ALASKA CHAMBERS DEPLETION DESTRUCTION LATITUDE MEASUREMENT PARTICULATES PHASE PHOTOLYSIS PRODUCTION PRODUCTION RATE RADIATION RATES RODS SEASONS SYMPOSIA ARCTIC REGIONS GASES PHOTOCHEMICAL REACTIONS Component Reports *Barrow Ozone depletion Bromoform Dibromochloromethane Actinic radiation Heterogenous reactions Sturges, W. T. Schnell, R. C. Landsberger, S. Bromine and Surface Ozone Atmospheric Chemistry at Barrow, Alaska During Spring 1989 |
topic_facet |
Geography Geology Geochemistry and Mineralogy Atmospheric Physics *BROMINE *OZONE *SURFACES *ATMOSPHERIC CHEMISTRY *SPRING SEASON AIR ALASKA CHAMBERS DEPLETION DESTRUCTION LATITUDE MEASUREMENT PARTICULATES PHASE PHOTOLYSIS PRODUCTION PRODUCTION RATE RADIATION RATES RODS SEASONS SYMPOSIA ARCTIC REGIONS GASES PHOTOCHEMICAL REACTIONS Component Reports *Barrow Ozone depletion Bromoform Dibromochloromethane Actinic radiation Heterogenous reactions |
description |
Measurements were made of surface ozone, particulate bromine and organic gaseous bromine species at Barrow, Alaska during March and April 1989 with a view to examining the causes of surface ozone destruction during the arctic spring. It was found that during major ozone depletion events (03 < 25 ppbv) concentrations of particulate bromine and the organic brominated gases bromoform and dibromo-chloromethane were elevated. A fast production rate of particulate bromine was shown by irradiating ambient nighttime air at Barrow in a chamber with actinic radiation that simulated midday conditions for that season and latitude. Such rapid reactions are not in keeping with gas phase photolysis of bromoform, but further studies showed evidence for a substantial fraction of organic bromine in the particulate phase, thus heterogenous reactions may be important. This article is from 'Proceedings of the International Conference on the Role of Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 1990. Volume 2', AD-A253 028, p751-755. See also Volume 1, AD-A253 027. |
author2 |
COLORADO UNIV AT BOULDER |
format |
Text |
author |
Sturges, W. T. Schnell, R. C. Landsberger, S. |
author_facet |
Sturges, W. T. Schnell, R. C. Landsberger, S. |
author_sort |
Sturges, W. T. |
title |
Bromine and Surface Ozone Atmospheric Chemistry at Barrow, Alaska During Spring 1989 |
title_short |
Bromine and Surface Ozone Atmospheric Chemistry at Barrow, Alaska During Spring 1989 |
title_full |
Bromine and Surface Ozone Atmospheric Chemistry at Barrow, Alaska During Spring 1989 |
title_fullStr |
Bromine and Surface Ozone Atmospheric Chemistry at Barrow, Alaska During Spring 1989 |
title_full_unstemmed |
Bromine and Surface Ozone Atmospheric Chemistry at Barrow, Alaska During Spring 1989 |
title_sort |
bromine and surface ozone atmospheric chemistry at barrow, alaska during spring 1989 |
publishDate |
1992 |
url |
http://www.dtic.mil/docs/citations/ADP007367 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007367 |
geographic |
Arctic Fairbanks |
geographic_facet |
Arctic Fairbanks |
genre |
Arctic Barrow Alaska |
genre_facet |
Arctic Barrow Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADP007367 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766329938492784640 |