Strong wind events in the Antarctic
We use quality controlled in situ meteorological observations collected at Antarctic research stations over the last 60 years to carry out the first continent-wide investigation into the occurrence, variability, and trend in strong wind events (SWEs). Reanalysis/analysis fields are used to examine t...
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American Geophysical Union
2009
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ftnerc:oai:nora.nerc.ac.uk:11330 2023-05-15T13:45:10+02:00 Strong wind events in the Antarctic Turner, John Chenoli, Sheeba Nettukandy abu Samah, Azizan Marshall, Gareth Phillips, Tony Orr, Andrew 2009 text http://nora.nerc.ac.uk/id/eprint/11330/ https://nora.nerc.ac.uk/id/eprint/11330/1/jgrd15434.pdf http://www.agu.org/journals/jd/jd0918/2008JD011642/2008JD011642.pdf en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/11330/1/jgrd15434.pdf Turner, John orcid:0000-0002-6111-5122 Chenoli, Sheeba Nettukandy; abu Samah, Azizan; Marshall, Gareth orcid:0000-0001-8887-7314 Phillips, Tony orcid:0000-0002-3058-9157 Orr, Andrew orcid:0000-0001-5111-8402 . 2009 Strong wind events in the Antarctic. Journal of Geophysical Research, 114 (D8), D18103. 25, pp. https://doi.org/10.1029/2008JD011642 <https://doi.org/10.1029/2008JD011642> Meteorology and Climatology Publication - Article PeerReviewed 2009 ftnerc https://doi.org/10.1029/2008JD011642 2023-02-04T19:27:17Z We use quality controlled in situ meteorological observations collected at Antarctic research stations over the last 60 years to carry out the first continent-wide investigation into the occurrence, variability, and trend in strong wind events (SWEs). Reanalysis/analysis fields are used to examine the synoptic background in which such events take place. SWEs are a feature of the extended winter season and involve a complex interaction between the downslope buoyancy forcing and the pressure gradient force from synoptic-scale cyclones. Around the coast of East Antarctica the significant majority of SWEs are associated with enhancement of the downslope katabatic flow by the broadscale synoptic circulation, involving a deepening of pressure off the coast and an increase of pressure inland. Orientation of the valleys in relation to the cyclone track is critical in enabling enhancement of the katabatic winds. Casey, Mawson, and Dumont d'Urville stations report the greatest number of winds of storm force and stronger. Interannual variability of SWE numbers is large. Trends in the number of winter strong wind reports are small. The greatest statistically significant increase in wind speed since the 1950s has been at Faraday/Vernadsky and Syowa stations. The largest wind speed increases since 1979 have been at Davis and Mawson stations. Comparison with high-resolution numerical simulations showed that the reanalysis/analysis fields are able to capture the large-scale synoptic features and the associated enhancement of the katabatic flow but underestimated the observed wind speed if it was strongly influenced by local topographical conditions. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic East Antarctica Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) Journal of Geophysical Research 114 D18 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Meteorology and Climatology |
spellingShingle |
Meteorology and Climatology Turner, John Chenoli, Sheeba Nettukandy abu Samah, Azizan Marshall, Gareth Phillips, Tony Orr, Andrew Strong wind events in the Antarctic |
topic_facet |
Meteorology and Climatology |
description |
We use quality controlled in situ meteorological observations collected at Antarctic research stations over the last 60 years to carry out the first continent-wide investigation into the occurrence, variability, and trend in strong wind events (SWEs). Reanalysis/analysis fields are used to examine the synoptic background in which such events take place. SWEs are a feature of the extended winter season and involve a complex interaction between the downslope buoyancy forcing and the pressure gradient force from synoptic-scale cyclones. Around the coast of East Antarctica the significant majority of SWEs are associated with enhancement of the downslope katabatic flow by the broadscale synoptic circulation, involving a deepening of pressure off the coast and an increase of pressure inland. Orientation of the valleys in relation to the cyclone track is critical in enabling enhancement of the katabatic winds. Casey, Mawson, and Dumont d'Urville stations report the greatest number of winds of storm force and stronger. Interannual variability of SWE numbers is large. Trends in the number of winter strong wind reports are small. The greatest statistically significant increase in wind speed since the 1950s has been at Faraday/Vernadsky and Syowa stations. The largest wind speed increases since 1979 have been at Davis and Mawson stations. Comparison with high-resolution numerical simulations showed that the reanalysis/analysis fields are able to capture the large-scale synoptic features and the associated enhancement of the katabatic flow but underestimated the observed wind speed if it was strongly influenced by local topographical conditions. |
format |
Article in Journal/Newspaper |
author |
Turner, John Chenoli, Sheeba Nettukandy abu Samah, Azizan Marshall, Gareth Phillips, Tony Orr, Andrew |
author_facet |
Turner, John Chenoli, Sheeba Nettukandy abu Samah, Azizan Marshall, Gareth Phillips, Tony Orr, Andrew |
author_sort |
Turner, John |
title |
Strong wind events in the Antarctic |
title_short |
Strong wind events in the Antarctic |
title_full |
Strong wind events in the Antarctic |
title_fullStr |
Strong wind events in the Antarctic |
title_full_unstemmed |
Strong wind events in the Antarctic |
title_sort |
strong wind events in the antarctic |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
http://nora.nerc.ac.uk/id/eprint/11330/ https://nora.nerc.ac.uk/id/eprint/11330/1/jgrd15434.pdf http://www.agu.org/journals/jd/jd0918/2008JD011642/2008JD011642.pdf |
long_lat |
ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
geographic |
Antarctic The Antarctic East Antarctica Dumont d'Urville Dumont-d'Urville Faraday |
geographic_facet |
Antarctic The Antarctic East Antarctica Dumont d'Urville Dumont-d'Urville Faraday |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/11330/1/jgrd15434.pdf Turner, John orcid:0000-0002-6111-5122 Chenoli, Sheeba Nettukandy; abu Samah, Azizan; Marshall, Gareth orcid:0000-0001-8887-7314 Phillips, Tony orcid:0000-0002-3058-9157 Orr, Andrew orcid:0000-0001-5111-8402 . 2009 Strong wind events in the Antarctic. Journal of Geophysical Research, 114 (D8), D18103. 25, pp. https://doi.org/10.1029/2008JD011642 <https://doi.org/10.1029/2008JD011642> |
op_doi |
https://doi.org/10.1029/2008JD011642 |
container_title |
Journal of Geophysical Research |
container_volume |
114 |
container_issue |
D18 |
_version_ |
1766214501126897664 |