Vortex-averaged ozone losses in the winter 2002/2003
Abstract. A total ozone depletion of 67 Dobson units from December 1, 2002, to March 10, 2003, has been derived by the vortex average method taking into account both diabatic descent of the air masses and transport of air into the vortex. Defining the Vortex Edge Potential vorticity (PV) criteria ar...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.534.8570 2023-05-15T15:10:35+02:00 Vortex-averaged ozone losses in the winter 2002/2003 T. Christensen B. M. Knudsen S. B. Andersen A. Benesova B. R. Bojkov H. Claude J. Davies H. De Backer H. Dier V. Dorokhov M. Gerding M. Gil B. Henchoz H. Kelder R. Kivi Z. Litynska G. Peters R. J. Shearman P. Skrivankova R. Stubi T. Turunen G. Vaughan P. Viatte P. Von Der Gathen I. Zaitcev The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.534.8570 http://web.dmi.dk/fsweb/solar-terrestrial/staff/christensen/qos.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.534.8570 http://web.dmi.dk/fsweb/solar-terrestrial/staff/christensen/qos.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://web.dmi.dk/fsweb/solar-terrestrial/staff/christensen/qos.pdf text 2002 ftciteseerx 2016-01-08T10:46:27Z Abstract. A total ozone depletion of 67 Dobson units from December 1, 2002, to March 10, 2003, has been derived by the vortex average method taking into account both diabatic descent of the air masses and transport of air into the vortex. Defining the Vortex Edge Potential vorticity (PV) criteria are used to define the ex-tent of the Arctic vortex: The PV value exhibiting the largest gradient in PV as a function of equivalent latitude is used as the edge of the vortex. In case of multiple maxima within 10 % of each other the PV value closest to the previous day is used. If the PV gradient with respect to equivalent lati-tude is smaller than 1.0 × 10−6 Km2s−1kg−1/degree for an isolated point, the average PV value of the previous and the next day is used. If two or more points have a gradient be-low this limit, the vortex is considered broken down or not yet established. In such cases the PV value of the “edge ” is determined such that the equivalent latitude is the same as for the level above. At 475 K and above the vortex was established by De-cember 10, 2002, and did not break down before April. At 435 K the vortex was established on January 2, 2003. At 400 K and below no vortex existed at any time in the winter 2002/03. Observations The full data set available for this study comprises 603 ozone sondes from 25 stations north of 45 ◦ N in the period Text Arctic Unknown Arctic |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Abstract. A total ozone depletion of 67 Dobson units from December 1, 2002, to March 10, 2003, has been derived by the vortex average method taking into account both diabatic descent of the air masses and transport of air into the vortex. Defining the Vortex Edge Potential vorticity (PV) criteria are used to define the ex-tent of the Arctic vortex: The PV value exhibiting the largest gradient in PV as a function of equivalent latitude is used as the edge of the vortex. In case of multiple maxima within 10 % of each other the PV value closest to the previous day is used. If the PV gradient with respect to equivalent lati-tude is smaller than 1.0 × 10−6 Km2s−1kg−1/degree for an isolated point, the average PV value of the previous and the next day is used. If two or more points have a gradient be-low this limit, the vortex is considered broken down or not yet established. In such cases the PV value of the “edge ” is determined such that the equivalent latitude is the same as for the level above. At 475 K and above the vortex was established by De-cember 10, 2002, and did not break down before April. At 435 K the vortex was established on January 2, 2003. At 400 K and below no vortex existed at any time in the winter 2002/03. Observations The full data set available for this study comprises 603 ozone sondes from 25 stations north of 45 ◦ N in the period |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
T. Christensen B. M. Knudsen S. B. Andersen A. Benesova B. R. Bojkov H. Claude J. Davies H. De Backer H. Dier V. Dorokhov M. Gerding M. Gil B. Henchoz H. Kelder R. Kivi Z. Litynska G. Peters R. J. Shearman P. Skrivankova R. Stubi T. Turunen G. Vaughan P. Viatte P. Von Der Gathen I. Zaitcev |
spellingShingle |
T. Christensen B. M. Knudsen S. B. Andersen A. Benesova B. R. Bojkov H. Claude J. Davies H. De Backer H. Dier V. Dorokhov M. Gerding M. Gil B. Henchoz H. Kelder R. Kivi Z. Litynska G. Peters R. J. Shearman P. Skrivankova R. Stubi T. Turunen G. Vaughan P. Viatte P. Von Der Gathen I. Zaitcev Vortex-averaged ozone losses in the winter 2002/2003 |
author_facet |
T. Christensen B. M. Knudsen S. B. Andersen A. Benesova B. R. Bojkov H. Claude J. Davies H. De Backer H. Dier V. Dorokhov M. Gerding M. Gil B. Henchoz H. Kelder R. Kivi Z. Litynska G. Peters R. J. Shearman P. Skrivankova R. Stubi T. Turunen G. Vaughan P. Viatte P. Von Der Gathen I. Zaitcev |
author_sort |
T. Christensen |
title |
Vortex-averaged ozone losses in the winter 2002/2003 |
title_short |
Vortex-averaged ozone losses in the winter 2002/2003 |
title_full |
Vortex-averaged ozone losses in the winter 2002/2003 |
title_fullStr |
Vortex-averaged ozone losses in the winter 2002/2003 |
title_full_unstemmed |
Vortex-averaged ozone losses in the winter 2002/2003 |
title_sort |
vortex-averaged ozone losses in the winter 2002/2003 |
publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.534.8570 http://web.dmi.dk/fsweb/solar-terrestrial/staff/christensen/qos.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
http://web.dmi.dk/fsweb/solar-terrestrial/staff/christensen/qos.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.534.8570 http://web.dmi.dk/fsweb/solar-terrestrial/staff/christensen/qos.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766341579999543296 |