A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories
The permeability of the Antarctic polar vortex is investigated in late austral winter and spring by comparing isentropic and three-dimensional (3-D) trajectories. Trajectory computations were performed with the help of the Royal Dutch Meteorological Institute (KNMI) trajectory model, using data from...
Published in: | Journal of Geophysical Research: Atmospheres |
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Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2002
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Online Access: | https://research.tue.nl/en/publications/d1ba5dcd-53ea-41ce-8a7e-797d029a9b2f https://doi.org/10.1029/2001JD001363 https://pure.tue.nl/ws/files/101386311/_llers_et_al_2002_Journal_of_Geophysical_Research_Atmospheres_1984_2012_.pdf http://www.scopus.com/inward/record.url?scp=0141773176&partnerID=8YFLogxK |
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ftuniveindcris:oai:pure.tue.nl:publications/d1ba5dcd-53ea-41ce-8a7e-797d029a9b2f 2024-10-06T13:43:21+00:00 A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories Öllers, Michel C. Van Velthoven, Peter F.J. Kelder, Hennie M. Kamp, Leon P.J. 2002 application/pdf https://research.tue.nl/en/publications/d1ba5dcd-53ea-41ce-8a7e-797d029a9b2f https://doi.org/10.1029/2001JD001363 https://pure.tue.nl/ws/files/101386311/_llers_et_al_2002_Journal_of_Geophysical_Research_Atmospheres_1984_2012_.pdf http://www.scopus.com/inward/record.url?scp=0141773176&partnerID=8YFLogxK eng eng https://research.tue.nl/en/publications/d1ba5dcd-53ea-41ce-8a7e-797d029a9b2f info:eu-repo/semantics/openAccess Öllers , M C , Van Velthoven , P F J , Kelder , H M & Kamp , L P J 2002 , ' A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories ' , Journal of Geophysical Research. D, Atmospheres , vol. 107 , no. D17 , 4328 , pp. 4328-1/14 . https://doi.org/10.1029/2001JD001363 Ozone hole Planetary waves Polar vortex Stratospheric mixing and transport article 2002 ftuniveindcris https://doi.org/10.1029/2001JD001363 2024-09-12T15:24:55Z The permeability of the Antarctic polar vortex is investigated in late austral winter and spring by comparing isentropic and three-dimensional (3-D) trajectories. Trajectory computations were performed with the help of the Royal Dutch Meteorological Institute (KNMI) trajectory model, using data from the European Centre for Medium-Range Weather Forecasts (ECMWF) from August to November 1998. Large numbers of air parcels were initially released inside and outside the polar vortex on the 350, 450, and 550 K isentropic surfaces. They were integrated 4 months forward in time in an isentropic mode, as well as in a 3-D mode that uses all three wind components from the ECMWF and takes into account diabatic heating and cooling effects. For the isentropic trajectory calculations, very little transport (0.37%/week) was found for August and September, while October and November gave somewhat higher transport rates (1.95%/week). The 3-D trajectory calculations for October gave much more exchange between the vortex and midlatitudes than the isentropic ones owing to a significant number of parcels that descended inside the vortex. Descent rates were calculated for 350 K (October), 450 K (August–October) and 550 K (October). Overall, the results show that 3-D trajectories will provide more accurate leakage rates than the isentropic ones. Also, despite the large-scale mixing in the polar vortex or in midlatitudes, little ozone-depleted air leaks from the ozone hole into the midlatitude stratosphere. Article in Journal/Newspaper Antarc* Antarctic Eindhoven University of Technology research portal Antarctic Austral The Antarctic Journal of Geophysical Research: Atmospheres 107 D17 3-1 3-14 |
institution |
Open Polar |
collection |
Eindhoven University of Technology research portal |
op_collection_id |
ftuniveindcris |
language |
English |
topic |
Ozone hole Planetary waves Polar vortex Stratospheric mixing and transport |
spellingShingle |
Ozone hole Planetary waves Polar vortex Stratospheric mixing and transport Öllers, Michel C. Van Velthoven, Peter F.J. Kelder, Hennie M. Kamp, Leon P.J. A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories |
topic_facet |
Ozone hole Planetary waves Polar vortex Stratospheric mixing and transport |
description |
The permeability of the Antarctic polar vortex is investigated in late austral winter and spring by comparing isentropic and three-dimensional (3-D) trajectories. Trajectory computations were performed with the help of the Royal Dutch Meteorological Institute (KNMI) trajectory model, using data from the European Centre for Medium-Range Weather Forecasts (ECMWF) from August to November 1998. Large numbers of air parcels were initially released inside and outside the polar vortex on the 350, 450, and 550 K isentropic surfaces. They were integrated 4 months forward in time in an isentropic mode, as well as in a 3-D mode that uses all three wind components from the ECMWF and takes into account diabatic heating and cooling effects. For the isentropic trajectory calculations, very little transport (0.37%/week) was found for August and September, while October and November gave somewhat higher transport rates (1.95%/week). The 3-D trajectory calculations for October gave much more exchange between the vortex and midlatitudes than the isentropic ones owing to a significant number of parcels that descended inside the vortex. Descent rates were calculated for 350 K (October), 450 K (August–October) and 550 K (October). Overall, the results show that 3-D trajectories will provide more accurate leakage rates than the isentropic ones. Also, despite the large-scale mixing in the polar vortex or in midlatitudes, little ozone-depleted air leaks from the ozone hole into the midlatitude stratosphere. |
format |
Article in Journal/Newspaper |
author |
Öllers, Michel C. Van Velthoven, Peter F.J. Kelder, Hennie M. Kamp, Leon P.J. |
author_facet |
Öllers, Michel C. Van Velthoven, Peter F.J. Kelder, Hennie M. Kamp, Leon P.J. |
author_sort |
Öllers, Michel C. |
title |
A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories |
title_short |
A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories |
title_full |
A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories |
title_fullStr |
A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories |
title_full_unstemmed |
A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories |
title_sort |
study of the leakage of the antarctic polar vortex in late austral winter and spring using isentropic and 3-d trajectories |
publishDate |
2002 |
url |
https://research.tue.nl/en/publications/d1ba5dcd-53ea-41ce-8a7e-797d029a9b2f https://doi.org/10.1029/2001JD001363 https://pure.tue.nl/ws/files/101386311/_llers_et_al_2002_Journal_of_Geophysical_Research_Atmospheres_1984_2012_.pdf http://www.scopus.com/inward/record.url?scp=0141773176&partnerID=8YFLogxK |
geographic |
Antarctic Austral The Antarctic |
geographic_facet |
Antarctic Austral The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Öllers , M C , Van Velthoven , P F J , Kelder , H M & Kamp , L P J 2002 , ' A study of the leakage of the Antarctic polar vortex in late austral winter and spring using isentropic and 3-D trajectories ' , Journal of Geophysical Research. D, Atmospheres , vol. 107 , no. D17 , 4328 , pp. 4328-1/14 . https://doi.org/10.1029/2001JD001363 |
op_relation |
https://research.tue.nl/en/publications/d1ba5dcd-53ea-41ce-8a7e-797d029a9b2f |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2001JD001363 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
107 |
container_issue |
D17 |
container_start_page |
3-1 |
op_container_end_page |
3-14 |
_version_ |
1812180305835982848 |