Simulation of polar ozone depletion: An update
We evaluate polar ozone depletion chemistry using the specified dynamics version of the Whole Atmosphere Community Climate Model for the year 2011. We find that total ozone depletion in both hemispheres is dependent on cold temperatures (below 192 K) and associated heterogeneous chemistry on polar s...
Published in: | Journal of Geophysical Research: Atmospheres |
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Language: | English |
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2015
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-016 https://doi.org/10.1002/2015JD023365 |
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ftncar:oai:drupal-site.org:articles_16890 2023-09-05T13:13:57+02:00 Simulation of polar ozone depletion: An update Solomon, Susan (author) Kinnison, Douglas (author) Bandoro, Justin (author) Garcia, Rolando (author) 2015-08-16 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-016 https://doi.org/10.1002/2015JD023365 en eng Journal of Geophysical Research-Atmospheres http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-016 doi:10.1002/2015JD023365 ark:/85065/d77082m7 Copyright 2015 American Geophysical Union. Text article 2015 ftncar https://doi.org/10.1002/2015JD023365 2023-08-14T18:44:39Z We evaluate polar ozone depletion chemistry using the specified dynamics version of the Whole Atmosphere Community Climate Model for the year 2011. We find that total ozone depletion in both hemispheres is dependent on cold temperatures (below 192 K) and associated heterogeneous chemistry on polar stratospheric cloud particles. Reactions limited to warmer temperatures above 192 K, or on binary liquid aerosols, yield little modeled polar ozone depletion in either hemisphere. An imposed factor of three enhancement in stratospheric sulfate increases ozone loss by up to 20 Dobson unit (DU) in the Antarctic and 15 DU in the Arctic in this model. Such enhanced sulfate loads are similar to those observed following recent relatively small volcanic eruptions since 2005 and imply impacts on the search for polar ozone recovery. Ozone losses are strongly sensitive to temperature, with a test case cooler by 2 K producing as much as 30 DU additional ozone loss in the Antarctic and 40 DU in the Arctic. A new finding of this paper is the use of the temporal behavior and variability of ClONO₂ and HCl as indicators of the efficacy of heterogeneous chemistry. Transport of ClONO₂ from the southern subpolar regions near 55-65°S to higher latitudes near 65-75°S provides a flux of NOx from more sunlit latitudes to the edge of the vortex and is important for ozone loss in this model. Comparisons between modeled and observed total column and profile ozone perturbations, ClONO₂ abundances, and the rate of change of HCl bolster confidence in these conclusions. Article in Journal/Newspaper Antarc* Antarctic Arctic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic Arctic The Antarctic Journal of Geophysical Research: Atmospheres 120 15 7958 7974 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
We evaluate polar ozone depletion chemistry using the specified dynamics version of the Whole Atmosphere Community Climate Model for the year 2011. We find that total ozone depletion in both hemispheres is dependent on cold temperatures (below 192 K) and associated heterogeneous chemistry on polar stratospheric cloud particles. Reactions limited to warmer temperatures above 192 K, or on binary liquid aerosols, yield little modeled polar ozone depletion in either hemisphere. An imposed factor of three enhancement in stratospheric sulfate increases ozone loss by up to 20 Dobson unit (DU) in the Antarctic and 15 DU in the Arctic in this model. Such enhanced sulfate loads are similar to those observed following recent relatively small volcanic eruptions since 2005 and imply impacts on the search for polar ozone recovery. Ozone losses are strongly sensitive to temperature, with a test case cooler by 2 K producing as much as 30 DU additional ozone loss in the Antarctic and 40 DU in the Arctic. A new finding of this paper is the use of the temporal behavior and variability of ClONO₂ and HCl as indicators of the efficacy of heterogeneous chemistry. Transport of ClONO₂ from the southern subpolar regions near 55-65°S to higher latitudes near 65-75°S provides a flux of NOx from more sunlit latitudes to the edge of the vortex and is important for ozone loss in this model. Comparisons between modeled and observed total column and profile ozone perturbations, ClONO₂ abundances, and the rate of change of HCl bolster confidence in these conclusions. |
author2 |
Solomon, Susan (author) Kinnison, Douglas (author) Bandoro, Justin (author) Garcia, Rolando (author) |
format |
Article in Journal/Newspaper |
title |
Simulation of polar ozone depletion: An update |
spellingShingle |
Simulation of polar ozone depletion: An update |
title_short |
Simulation of polar ozone depletion: An update |
title_full |
Simulation of polar ozone depletion: An update |
title_fullStr |
Simulation of polar ozone depletion: An update |
title_full_unstemmed |
Simulation of polar ozone depletion: An update |
title_sort |
simulation of polar ozone depletion: an update |
publishDate |
2015 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-016 https://doi.org/10.1002/2015JD023365 |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_relation |
Journal of Geophysical Research-Atmospheres http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-016 doi:10.1002/2015JD023365 ark:/85065/d77082m7 |
op_rights |
Copyright 2015 American Geophysical Union. |
op_doi |
https://doi.org/10.1002/2015JD023365 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
15 |
container_start_page |
7958 |
op_container_end_page |
7974 |
_version_ |
1776205064362262528 |