Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records
Episodes of ozone depletion in the lowermost Arctic atmosphere (0--2 km) at polar sunrise have been intensively studied at Alert, Canada, and are thought to result from catalytic reactions involving bromine. Recent observations of high concentrations of tropospheric BrO over large areas of the Arcti...
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Online Access: | https://doi.org/10.5194/acp-2-197-2002 https://www.atmos-chem-phys.net/2/197/2002/ |
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ftcopernicus:oai:publications.copernicus.org:acp3311 2023-05-15T13:55:27+02:00 Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records Tarasick, D. W. Bottenheim, J. W. 2018-06-29 application/pdf https://doi.org/10.5194/acp-2-197-2002 https://www.atmos-chem-phys.net/2/197/2002/ eng eng doi:10.5194/acp-2-197-2002 https://www.atmos-chem-phys.net/2/197/2002/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-2-197-2002 2019-12-24T09:59:39Z Episodes of ozone depletion in the lowermost Arctic atmosphere (0--2 km) at polar sunrise have been intensively studied at Alert, Canada, and are thought to result from catalytic reactions involving bromine. Recent observations of high concentrations of tropospheric BrO over large areas of the Arctic and Antarctic suggest that such depletion events should also be seen by ozonesondes at other polar stations. An examination of historical ozonesonde records shows that such events occur frequently at Alert, Eureka and Resolute, but much less frequently at Churchill and at other stations. The differences appear to be related to differences in average springtime surface temperatures. The long record at Resolute shows depletions since 1966, but with an increase in their frequency over the period 1966--2000 of 0.66 ± 0.59% per year (95% confidence limits), explaining the apparent increase of Hg in Arctic biota in recent times. Text Antarc* Antarctic Arctic Copernicus Publications: E-Journals Antarctic Arctic Canada Eureka ENVELOPE(-85.940,-85.940,79.990,79.990) Atmospheric Chemistry and Physics 2 3 197 205 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Episodes of ozone depletion in the lowermost Arctic atmosphere (0--2 km) at polar sunrise have been intensively studied at Alert, Canada, and are thought to result from catalytic reactions involving bromine. Recent observations of high concentrations of tropospheric BrO over large areas of the Arctic and Antarctic suggest that such depletion events should also be seen by ozonesondes at other polar stations. An examination of historical ozonesonde records shows that such events occur frequently at Alert, Eureka and Resolute, but much less frequently at Churchill and at other stations. The differences appear to be related to differences in average springtime surface temperatures. The long record at Resolute shows depletions since 1966, but with an increase in their frequency over the period 1966--2000 of 0.66 ± 0.59% per year (95% confidence limits), explaining the apparent increase of Hg in Arctic biota in recent times. |
format |
Text |
author |
Tarasick, D. W. Bottenheim, J. W. |
spellingShingle |
Tarasick, D. W. Bottenheim, J. W. Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records |
author_facet |
Tarasick, D. W. Bottenheim, J. W. |
author_sort |
Tarasick, D. W. |
title |
Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records |
title_short |
Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records |
title_full |
Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records |
title_fullStr |
Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records |
title_full_unstemmed |
Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records |
title_sort |
surface ozone depletion episodes in the arctic and antarctic from historical ozonesonde records |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-2-197-2002 https://www.atmos-chem-phys.net/2/197/2002/ |
long_lat |
ENVELOPE(-85.940,-85.940,79.990,79.990) |
geographic |
Antarctic Arctic Canada Eureka |
geographic_facet |
Antarctic Arctic Canada Eureka |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-2-197-2002 https://www.atmos-chem-phys.net/2/197/2002/ |
op_doi |
https://doi.org/10.5194/acp-2-197-2002 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
2 |
container_issue |
3 |
container_start_page |
197 |
op_container_end_page |
205 |
_version_ |
1766262075428962304 |