Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter

Measurements of total ozone in Antarctica during early winter show an increase, consistent with the observed descent of stratospheric air and the convergence that accompanies descent. Measurements in the vortex edge region at Faraday (65°S) show that the rate of increase has on average doubled betwe...

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Published in:Quarterly Journal of the Royal Meteorological Society
Main Authors: Roscoe, H.K., Fowler, C.L., Shanklin, J.D., Hill, J.G.T.
Format: Article in Journal/Newspaper
Language:unknown
Published: Royal Meteorological Society 2004
Subjects:
Online Access:http://nora.nerc.ac.uk/id/eprint/12396/
http://onlinelibrary.wiley.com/doi/10.1256/qj.03.70/pdf
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spelling ftnerc:oai:nora.nerc.ac.uk:12396 2023-05-15T13:45:11+02:00 Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter Roscoe, H.K. Fowler, C.L. Shanklin, J.D. Hill, J.G.T. 2004 http://nora.nerc.ac.uk/id/eprint/12396/ http://onlinelibrary.wiley.com/doi/10.1256/qj.03.70/pdf unknown Royal Meteorological Society Roscoe, H.K.; Fowler, C.L.; Shanklin, J.D.; Hill, J.G.T. 2004 Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter. Quarterly Journal of the Royal Meteorological Society, 130 (Pt. A, No. 598). 1123-1135. https://doi.org/10.1256/qj.03.70 <https://doi.org/10.1256/qj.03.70> Atmospheric Sciences Publication - Article PeerReviewed 2004 ftnerc https://doi.org/10.1256/qj.03.70 2023-02-04T19:27:55Z Measurements of total ozone in Antarctica during early winter show an increase, consistent with the observed descent of stratospheric air and the convergence that accompanies descent. Measurements in the vortex edge region at Faraday (65°S) show that the rate of increase has on average doubled between the 1960s and the 1990s. We speculate that this increase in rate of ozone change is caused by an increase in convergence. If so, it suggests that the strength of the Brewer–Dobson residual stratospheric circulation, which brings tropospheric air into the stratosphere with its accompanying chlorofluorocarbons and greenhouse gases, increased significantly. There is no obvious explanation for an increase in the circulation. Models predict that an ozone hole increases vortex strength, but only later in the spring. Models also predict that increased greenhouse gases increase the circulation, but the convergence did not increase gradually whereas greenhouse gases did. Some of the measurements in the 1990s are able to distinguish the different rates of increase of ozone in individual years, which show considerable variability, as expected following the eruption of Pinatubo. Article in Journal/Newspaper Antarc* Antarctic Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) The Antarctic Quarterly Journal of the Royal Meteorological Society 130 598 1123 1135
institution Open Polar
collection Natural Environment Research Council: NERC Open Research Archive
op_collection_id ftnerc
language unknown
topic Atmospheric Sciences
spellingShingle Atmospheric Sciences
Roscoe, H.K.
Fowler, C.L.
Shanklin, J.D.
Hill, J.G.T.
Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter
topic_facet Atmospheric Sciences
description Measurements of total ozone in Antarctica during early winter show an increase, consistent with the observed descent of stratospheric air and the convergence that accompanies descent. Measurements in the vortex edge region at Faraday (65°S) show that the rate of increase has on average doubled between the 1960s and the 1990s. We speculate that this increase in rate of ozone change is caused by an increase in convergence. If so, it suggests that the strength of the Brewer–Dobson residual stratospheric circulation, which brings tropospheric air into the stratosphere with its accompanying chlorofluorocarbons and greenhouse gases, increased significantly. There is no obvious explanation for an increase in the circulation. Models predict that an ozone hole increases vortex strength, but only later in the spring. Models also predict that increased greenhouse gases increase the circulation, but the convergence did not increase gradually whereas greenhouse gases did. Some of the measurements in the 1990s are able to distinguish the different rates of increase of ozone in individual years, which show considerable variability, as expected following the eruption of Pinatubo.
format Article in Journal/Newspaper
author Roscoe, H.K.
Fowler, C.L.
Shanklin, J.D.
Hill, J.G.T.
author_facet Roscoe, H.K.
Fowler, C.L.
Shanklin, J.D.
Hill, J.G.T.
author_sort Roscoe, H.K.
title Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter
title_short Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter
title_full Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter
title_fullStr Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter
title_full_unstemmed Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter
title_sort possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the antarctic vortex in early winter
publisher Royal Meteorological Society
publishDate 2004
url http://nora.nerc.ac.uk/id/eprint/12396/
http://onlinelibrary.wiley.com/doi/10.1256/qj.03.70/pdf
long_lat ENVELOPE(-64.256,-64.256,-65.246,-65.246)
geographic Antarctic
Faraday
The Antarctic
geographic_facet Antarctic
Faraday
The Antarctic
genre Antarc*
Antarctic
Antarctica
genre_facet Antarc*
Antarctic
Antarctica
op_relation Roscoe, H.K.; Fowler, C.L.; Shanklin, J.D.; Hill, J.G.T. 2004 Possible long-term changes in stratospheric circulation: evidence from total ozone measurements at the edge of the Antarctic vortex in early winter. Quarterly Journal of the Royal Meteorological Society, 130 (Pt. A, No. 598). 1123-1135. https://doi.org/10.1256/qj.03.70 <https://doi.org/10.1256/qj.03.70>
op_doi https://doi.org/10.1256/qj.03.70
container_title Quarterly Journal of the Royal Meteorological Society
container_volume 130
container_issue 598
container_start_page 1123
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