The semiannual oscillation and Antarctic climate. Part 4: a note on sea ice cover
Abstract: Following a weakening of the semi-annual oscillation (SAO) since the mid- 1970s, the half-yearly pressure wave in the Southern Hemisphere has become less significant. As a result, May/June temperatures have decreased in East Antarctica, which has moderated Antarctic warming. Spectral analy...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.461.7551 2023-05-15T14:06:38+02:00 The semiannual oscillation and Antarctic climate. Part 4: a note on sea ice cover Michiel R. Van Den Broeke The Pennsylvania State University CiteSeerX Archives 2000 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.461.7551 http://www.staff.science.uu.nl/~broek112/home.php_files/Publications_MvdB/1998b_vdBroeke_AS.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.461.7551 http://www.staff.science.uu.nl/~broek112/home.php_files/Publications_MvdB/1998b_vdBroeke_AS.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.staff.science.uu.nl/~broek112/home.php_files/Publications_MvdB/1998b_vdBroeke_AS.pdf text 2000 ftciteseerx 2016-10-16T00:03:19Z Abstract: Following a weakening of the semi-annual oscillation (SAO) since the mid- 1970s, the half-yearly pressure wave in the Southern Hemisphere has become less significant. As a result, May/June temperatures have decreased in East Antarctica, which has moderated Antarctic warming. Spectral analysis of 87 years of pressure data at Orcadas suggest that the recent weakening of the SAO is part of the natural variability of the Southern Hemisphere circulation on decadal timescales. We interpret the time series of composite Antarctic temperature in terms of the historical strengthening and weakening of the SAO. If the dominant oscillations that occurred in the past prove to be persistent, an accelerated East Antarctic warming trend is expected for the coming decades. There are indications that the strength of the SAO is linked to the Southern Oscillation, in the sense that warm phases of the Southern Oscillation coincide with strong westerlies, a weakly developed SAO and below-average temperatures in East Antarctica. Temperatures on the west coast of the Antarctic Peninsula show strongly deviant patterns, which can not be explained by the same mechanism that applies to Text Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Sea ice Unknown Antarctic Antarctic Peninsula East Antarctica Orcadas ENVELOPE(-44.717,-44.717,-60.750,-60.750) The Antarctic |
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Open Polar |
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ftciteseerx |
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English |
description |
Abstract: Following a weakening of the semi-annual oscillation (SAO) since the mid- 1970s, the half-yearly pressure wave in the Southern Hemisphere has become less significant. As a result, May/June temperatures have decreased in East Antarctica, which has moderated Antarctic warming. Spectral analysis of 87 years of pressure data at Orcadas suggest that the recent weakening of the SAO is part of the natural variability of the Southern Hemisphere circulation on decadal timescales. We interpret the time series of composite Antarctic temperature in terms of the historical strengthening and weakening of the SAO. If the dominant oscillations that occurred in the past prove to be persistent, an accelerated East Antarctic warming trend is expected for the coming decades. There are indications that the strength of the SAO is linked to the Southern Oscillation, in the sense that warm phases of the Southern Oscillation coincide with strong westerlies, a weakly developed SAO and below-average temperatures in East Antarctica. Temperatures on the west coast of the Antarctic Peninsula show strongly deviant patterns, which can not be explained by the same mechanism that applies to |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Michiel R. Van Den Broeke |
spellingShingle |
Michiel R. Van Den Broeke The semiannual oscillation and Antarctic climate. Part 4: a note on sea ice cover |
author_facet |
Michiel R. Van Den Broeke |
author_sort |
Michiel R. Van Den Broeke |
title |
The semiannual oscillation and Antarctic climate. Part 4: a note on sea ice cover |
title_short |
The semiannual oscillation and Antarctic climate. Part 4: a note on sea ice cover |
title_full |
The semiannual oscillation and Antarctic climate. Part 4: a note on sea ice cover |
title_fullStr |
The semiannual oscillation and Antarctic climate. Part 4: a note on sea ice cover |
title_full_unstemmed |
The semiannual oscillation and Antarctic climate. Part 4: a note on sea ice cover |
title_sort |
semiannual oscillation and antarctic climate. part 4: a note on sea ice cover |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.461.7551 http://www.staff.science.uu.nl/~broek112/home.php_files/Publications_MvdB/1998b_vdBroeke_AS.pdf |
long_lat |
ENVELOPE(-44.717,-44.717,-60.750,-60.750) |
geographic |
Antarctic Antarctic Peninsula East Antarctica Orcadas The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica Orcadas The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Sea ice |
op_source |
http://www.staff.science.uu.nl/~broek112/home.php_files/Publications_MvdB/1998b_vdBroeke_AS.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.461.7551 http://www.staff.science.uu.nl/~broek112/home.php_files/Publications_MvdB/1998b_vdBroeke_AS.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766278617633914880 |