QBO effects on Antarctic mesospheric winds and polar vortex dynamics
A dynamical link is demonstrated between the equatorial quasi-biennial oscillation (QBO) and high-latitude mesospheric zonal winds recorded by an Imaging Doppler Interferometer (IDI) at Halley, Antarctica. Above ~80 km eastward winds in winter (an extension of the polar vortex into the mesosphere) a...
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American Geophysical Union
2009
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ftnerc:oai:nora.nerc.ac.uk:10592 2023-05-15T13:45:10+02:00 QBO effects on Antarctic mesospheric winds and polar vortex dynamics Ford, Elaina Hibbins, Robert E. Jarvis, Martin J. 2009 text http://nora.nerc.ac.uk/id/eprint/10592/ https://nora.nerc.ac.uk/id/eprint/10592/1/grl26332.pdf http://www.agu.org/journals/gl/gl0920/2009GL039848/2009GL039848.pdf en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/10592/1/grl26332.pdf Ford, Elaina; Hibbins, Robert E. orcid:0000-0002-6867-2255 Jarvis, Martin J. 2009 QBO effects on Antarctic mesospheric winds and polar vortex dynamics. Geophysical Research Letters, 36, L20801. 6, pp. https://doi.org/10.1029/2009GL039848 <https://doi.org/10.1029/2009GL039848> Meteorology and Climatology Atmospheric Sciences Publication - Article PeerReviewed 2009 ftnerc https://doi.org/10.1029/2009GL039848 2023-02-04T19:26:49Z A dynamical link is demonstrated between the equatorial quasi-biennial oscillation (QBO) and high-latitude mesospheric zonal winds recorded by an Imaging Doppler Interferometer (IDI) at Halley, Antarctica. Above ~80 km eastward winds in winter (an extension of the polar vortex into the mesosphere) are strengthened under easterly 50 hPa QBO conditions. This is similar to the Holton-Tan effect in the stratosphere but working in opposition. The weak winter time zonal winds are shown to differ by up to 2.6 m/s dependent on QBO phase. In spring, zonal winds are most strongly correlated with the equatorial 25 hPa QBO and are significantly more westerly in November, an extension of the QBO response in the stratosphere below. It is suggested that QBO modulation of the vortex winds in the Antarctic mesosphere is dependent on planetary-wave activity from the Antarctic in winter and Arctic in spring. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Natural Environment Research Council: NERC Open Research Archive Arctic Antarctic The Antarctic Geophysical Research Letters 36 20 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Meteorology and Climatology Atmospheric Sciences |
spellingShingle |
Meteorology and Climatology Atmospheric Sciences Ford, Elaina Hibbins, Robert E. Jarvis, Martin J. QBO effects on Antarctic mesospheric winds and polar vortex dynamics |
topic_facet |
Meteorology and Climatology Atmospheric Sciences |
description |
A dynamical link is demonstrated between the equatorial quasi-biennial oscillation (QBO) and high-latitude mesospheric zonal winds recorded by an Imaging Doppler Interferometer (IDI) at Halley, Antarctica. Above ~80 km eastward winds in winter (an extension of the polar vortex into the mesosphere) are strengthened under easterly 50 hPa QBO conditions. This is similar to the Holton-Tan effect in the stratosphere but working in opposition. The weak winter time zonal winds are shown to differ by up to 2.6 m/s dependent on QBO phase. In spring, zonal winds are most strongly correlated with the equatorial 25 hPa QBO and are significantly more westerly in November, an extension of the QBO response in the stratosphere below. It is suggested that QBO modulation of the vortex winds in the Antarctic mesosphere is dependent on planetary-wave activity from the Antarctic in winter and Arctic in spring. |
format |
Article in Journal/Newspaper |
author |
Ford, Elaina Hibbins, Robert E. Jarvis, Martin J. |
author_facet |
Ford, Elaina Hibbins, Robert E. Jarvis, Martin J. |
author_sort |
Ford, Elaina |
title |
QBO effects on Antarctic mesospheric winds and polar vortex dynamics |
title_short |
QBO effects on Antarctic mesospheric winds and polar vortex dynamics |
title_full |
QBO effects on Antarctic mesospheric winds and polar vortex dynamics |
title_fullStr |
QBO effects on Antarctic mesospheric winds and polar vortex dynamics |
title_full_unstemmed |
QBO effects on Antarctic mesospheric winds and polar vortex dynamics |
title_sort |
qbo effects on antarctic mesospheric winds and polar vortex dynamics |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
http://nora.nerc.ac.uk/id/eprint/10592/ https://nora.nerc.ac.uk/id/eprint/10592/1/grl26332.pdf http://www.agu.org/journals/gl/gl0920/2009GL039848/2009GL039848.pdf |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Arctic |
genre_facet |
Antarc* Antarctic Antarctica Arctic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/10592/1/grl26332.pdf Ford, Elaina; Hibbins, Robert E. orcid:0000-0002-6867-2255 Jarvis, Martin J. 2009 QBO effects on Antarctic mesospheric winds and polar vortex dynamics. Geophysical Research Letters, 36, L20801. 6, pp. https://doi.org/10.1029/2009GL039848 <https://doi.org/10.1029/2009GL039848> |
op_doi |
https://doi.org/10.1029/2009GL039848 |
container_title |
Geophysical Research Letters |
container_volume |
36 |
container_issue |
20 |
_version_ |
1766214213792956416 |