Chemical depletion of Arctic ozone in winter 1999/2000
During Arctic winters with a cold, stable stratospheric circulation, reactions on the surface of polar stratospheric clouds (PSCs) lead to elevated abundances of chlorine monoxide (ClO) that, in the presence of sunlight, destroy ozone. Here we show that PSCs were more widespread during the 1999/2000...
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American Geophysical Union
2002
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Online Access: | https://doi.org/10.1029/2001JD000533 |
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ftcaltechauth:oai:authors.library.caltech.edu:w6kzm-d1123 2024-06-23T07:49:30+00:00 Chemical depletion of Arctic ozone in winter 1999/2000 Rex, M. Wennberg, P. 2002-09 https://doi.org/10.1029/2001JD000533 unknown American Geophysical Union https://doi.org/10.1029/2001JD000533 oai:authors.library.caltech.edu:w6kzm-d1123 eprintid:46585 resolverid:CaltechAUTHORS:20140701-070330116 info:eu-repo/semantics/openAccess Other Journal of Geophysical Research D, 107(D20), Art. No. 8276, (2002-09) ozone stratosphere Match info:eu-repo/semantics/article 2002 ftcaltechauth https://doi.org/10.1029/2001JD000533 2024-06-12T03:21:55Z During Arctic winters with a cold, stable stratospheric circulation, reactions on the surface of polar stratospheric clouds (PSCs) lead to elevated abundances of chlorine monoxide (ClO) that, in the presence of sunlight, destroy ozone. Here we show that PSCs were more widespread during the 1999/2000 Arctic winter than for any other Arctic winter in the past two decades. We have used three fundamentally different approaches to derive the degree of chemical ozone loss from ozonesonde, balloon, aircraft, and satellite instruments. We show that the ozone losses derived from these different instruments and approaches agree very well, resulting in a high level of confidence in the results. Chemical processes led to a 70% reduction of ozone for a region ∼1 km thick of the lower stratosphere, the largest degree of local loss ever reported for the Arctic. The Match analysis of ozonesonde data shows that the accumulated chemical loss of ozone inside the Arctic vortex totaled 117 ± 14 Dobson units (DU) by the end of winter. This loss, combined with dynamical redistribution of air parcels, resulted in a 88 ± 13 DU reduction in total column ozone compared to the amount that would have been present in the absence of any chemical loss. The chemical loss of ozone throughout the winter was nearly balanced by dynamical resupply of ozone to the vortex, resulting in a relatively constant value of total ozone of 340 ± 50 DU between early January and late March. This observation of nearly constant total ozone in the Arctic vortex is in contrast to the increase of total column ozone between January and March that is observed during most years. © 2002 American Geophysical Union. Received 12 February 2001; revised 2 July 2001; accepted 7 July 2001; published 20 September 2002. We thank the THESEO 2000 core group, the SOLVE project scientists, and all personnel associated with the project management for making this campaign possible. We thank the innumerable people that made this study possible due to their dedication: the ground ... Article in Journal/Newspaper Arctic Caltech Authors (California Institute of Technology) Arctic Journal of Geophysical Research: Atmospheres 107 D20 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
ozone stratosphere Match |
spellingShingle |
ozone stratosphere Match Rex, M. Wennberg, P. Chemical depletion of Arctic ozone in winter 1999/2000 |
topic_facet |
ozone stratosphere Match |
description |
During Arctic winters with a cold, stable stratospheric circulation, reactions on the surface of polar stratospheric clouds (PSCs) lead to elevated abundances of chlorine monoxide (ClO) that, in the presence of sunlight, destroy ozone. Here we show that PSCs were more widespread during the 1999/2000 Arctic winter than for any other Arctic winter in the past two decades. We have used three fundamentally different approaches to derive the degree of chemical ozone loss from ozonesonde, balloon, aircraft, and satellite instruments. We show that the ozone losses derived from these different instruments and approaches agree very well, resulting in a high level of confidence in the results. Chemical processes led to a 70% reduction of ozone for a region ∼1 km thick of the lower stratosphere, the largest degree of local loss ever reported for the Arctic. The Match analysis of ozonesonde data shows that the accumulated chemical loss of ozone inside the Arctic vortex totaled 117 ± 14 Dobson units (DU) by the end of winter. This loss, combined with dynamical redistribution of air parcels, resulted in a 88 ± 13 DU reduction in total column ozone compared to the amount that would have been present in the absence of any chemical loss. The chemical loss of ozone throughout the winter was nearly balanced by dynamical resupply of ozone to the vortex, resulting in a relatively constant value of total ozone of 340 ± 50 DU between early January and late March. This observation of nearly constant total ozone in the Arctic vortex is in contrast to the increase of total column ozone between January and March that is observed during most years. © 2002 American Geophysical Union. Received 12 February 2001; revised 2 July 2001; accepted 7 July 2001; published 20 September 2002. We thank the THESEO 2000 core group, the SOLVE project scientists, and all personnel associated with the project management for making this campaign possible. We thank the innumerable people that made this study possible due to their dedication: the ground ... |
format |
Article in Journal/Newspaper |
author |
Rex, M. Wennberg, P. |
author_facet |
Rex, M. Wennberg, P. |
author_sort |
Rex, M. |
title |
Chemical depletion of Arctic ozone in winter 1999/2000 |
title_short |
Chemical depletion of Arctic ozone in winter 1999/2000 |
title_full |
Chemical depletion of Arctic ozone in winter 1999/2000 |
title_fullStr |
Chemical depletion of Arctic ozone in winter 1999/2000 |
title_full_unstemmed |
Chemical depletion of Arctic ozone in winter 1999/2000 |
title_sort |
chemical depletion of arctic ozone in winter 1999/2000 |
publisher |
American Geophysical Union |
publishDate |
2002 |
url |
https://doi.org/10.1029/2001JD000533 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Journal of Geophysical Research D, 107(D20), Art. No. 8276, (2002-09) |
op_relation |
https://doi.org/10.1029/2001JD000533 oai:authors.library.caltech.edu:w6kzm-d1123 eprintid:46585 resolverid:CaltechAUTHORS:20140701-070330116 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.1029/2001JD000533 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
107 |
container_issue |
D20 |
_version_ |
1802639961381404672 |