Impact of mesospheric intrusions on ozone-tracer relations in the stratospheric polar vortex
Ozone-tracer relations are used to quantify chemical ozone loss in the polar vortices. The underlying assumptions for the application of this technique were extensively discussed in recent years. However, the impact intrusions of mesospheric air into the polar stratosphere have on estimates of chemi...
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American Geophysical Union
2007
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ftncar:oai:drupal-site.org:articles_6793 2023-10-01T03:53:53+02:00 Impact of mesospheric intrusions on ozone-tracer relations in the stratospheric polar vortex Müeller, Rolf (author) Tilmes, Simone (author) Grooß, Jens-Uwe (author) Engel, Andreas (author) Oelhaf, Hermann (author) Wetzel, Gerald (author) Huret, Nathalie (author) Pirre, Michel (author) Catoire, Valéry (author) Toon, Geoff (author) Nakajima, Hideaki (author) 2007-12-13 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-098 https://doi.org/10.1029/2006JD008315 en eng American Geophysical Union Journal of Geophysical Research-Atmospheres http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-098 doi:10.1029/2006JD008315 ark:/85065/d7pg1s02 Copyright 2007 American Geophysical Union. Text article 2007 ftncar https://doi.org/10.1029/2006JD008315 2023-09-04T18:27:48Z Ozone-tracer relations are used to quantify chemical ozone loss in the polar vortices. The underlying assumptions for the application of this technique were extensively discussed in recent years. However, the impact intrusions of mesospheric air into the polar stratosphere have on estimates of chemical ozone loss based on the ozone-tracer technique has not hitherto been studied. Here, we revisit observations of an intrusion of mesospheric air down to altitudes of ∼25 km (∼600 K potential temperature) in the Arctic vortex in 2003. The mesospheric intrusion was identified in three balloon profiles in January and March 2003 as a strong enhancement in CO. In contrast, NO y was not enhanced in the mesospheric air relative to surrounding air masses as shown by the measurement in late March 2003. The measurements influenced by mesospheric air show ozone mixing ratios ranging between 3.6 and 5.6 ppm, which are clearly greater than those found in the "early vortex" reference relation employed to deduce chemical ozone loss. Thus the impact of intrusions of mesospheric air into the polar vortex on chemical ozone loss estimates based on ozone-tracer relations are likely small; the correlations cannot be affected in a way that would lead to an overestimate of ozone depletion. Therefore ozone-tracer relations may be used for deducing chemical ozone loss in Arctic winter 2002-2003. Here we use ILAS-II satellite measurements to deduce an average chemical ozone loss in the vortex core for the partial column 380–550 K of 37 ± 11 Dobson units in March and of 50 ± 10 Dobson units in April 2003. Article in Journal/Newspaper Arctic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Ilas ENVELOPE(40.618,40.618,64.386,64.386) Journal of Geophysical Research 112 D23 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Ozone-tracer relations are used to quantify chemical ozone loss in the polar vortices. The underlying assumptions for the application of this technique were extensively discussed in recent years. However, the impact intrusions of mesospheric air into the polar stratosphere have on estimates of chemical ozone loss based on the ozone-tracer technique has not hitherto been studied. Here, we revisit observations of an intrusion of mesospheric air down to altitudes of ∼25 km (∼600 K potential temperature) in the Arctic vortex in 2003. The mesospheric intrusion was identified in three balloon profiles in January and March 2003 as a strong enhancement in CO. In contrast, NO y was not enhanced in the mesospheric air relative to surrounding air masses as shown by the measurement in late March 2003. The measurements influenced by mesospheric air show ozone mixing ratios ranging between 3.6 and 5.6 ppm, which are clearly greater than those found in the "early vortex" reference relation employed to deduce chemical ozone loss. Thus the impact of intrusions of mesospheric air into the polar vortex on chemical ozone loss estimates based on ozone-tracer relations are likely small; the correlations cannot be affected in a way that would lead to an overestimate of ozone depletion. Therefore ozone-tracer relations may be used for deducing chemical ozone loss in Arctic winter 2002-2003. Here we use ILAS-II satellite measurements to deduce an average chemical ozone loss in the vortex core for the partial column 380–550 K of 37 ± 11 Dobson units in March and of 50 ± 10 Dobson units in April 2003. |
author2 |
Müeller, Rolf (author) Tilmes, Simone (author) Grooß, Jens-Uwe (author) Engel, Andreas (author) Oelhaf, Hermann (author) Wetzel, Gerald (author) Huret, Nathalie (author) Pirre, Michel (author) Catoire, Valéry (author) Toon, Geoff (author) Nakajima, Hideaki (author) |
format |
Article in Journal/Newspaper |
title |
Impact of mesospheric intrusions on ozone-tracer relations in the stratospheric polar vortex |
spellingShingle |
Impact of mesospheric intrusions on ozone-tracer relations in the stratospheric polar vortex |
title_short |
Impact of mesospheric intrusions on ozone-tracer relations in the stratospheric polar vortex |
title_full |
Impact of mesospheric intrusions on ozone-tracer relations in the stratospheric polar vortex |
title_fullStr |
Impact of mesospheric intrusions on ozone-tracer relations in the stratospheric polar vortex |
title_full_unstemmed |
Impact of mesospheric intrusions on ozone-tracer relations in the stratospheric polar vortex |
title_sort |
impact of mesospheric intrusions on ozone-tracer relations in the stratospheric polar vortex |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-098 https://doi.org/10.1029/2006JD008315 |
long_lat |
ENVELOPE(40.618,40.618,64.386,64.386) |
geographic |
Arctic Ilas |
geographic_facet |
Arctic Ilas |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Journal of Geophysical Research-Atmospheres http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-098 doi:10.1029/2006JD008315 ark:/85065/d7pg1s02 |
op_rights |
Copyright 2007 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2006JD008315 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
D23 |
_version_ |
1778520948279869440 |