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Here we examine the relationship between the Southern Hemisphere (SH) Annular Mode (SAM) and Antarctic near-surface temperatures using data from Antarctic stations for 1957-2004. This near half-century period is significantly longer than analysed in previous studies. Furthermore, the four seasons ar...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.175.5879 2023-05-15T14:03:27+02:00 British Gareth J. Marshall High Cross Cb Et The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.175.5879 http://nora.nerc.ac.uk/1066/1/Marshall.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.175.5879 http://nora.nerc.ac.uk/1066/1/Marshall.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://nora.nerc.ac.uk/1066/1/Marshall.pdf text ftciteseerx 2016-01-07T16:12:59Z Here we examine the relationship between the Southern Hemisphere (SH) Annular Mode (SAM) and Antarctic near-surface temperatures using data from Antarctic stations for 1957-2004. This near half-century period is significantly longer than analysed in previous studies. Furthermore, the four seasons are considered independently while the longer datasets allow the temporal stability of the relationship to be investigated. A general pattern of positive (negative) correlations between the strength of the SAM and temperatures in the northern Antarctic Peninsula (East Antarctica) is shown to be valid for the last half century but detailed differences are observed between the seasons. These include a change in the sign of the relationship at one station, while at others there are single seasons when temperatures there are or, in some cases, are not significantly related to the SAM. Generally, SAM-temperature correlations are stronger across Antarctica in austral autumn and summer. Estimates of the contribution that trends in the SAM have made to Antarctic near-surface temperature change between 1957 and 2004 are greatest in autumn: in this season they exceed 1°C at half the 14 stations examined with a maximum change of –1.4°C. There does not appear to have been any significant long-term change in the strength of SAM-temperature relationships over the period examined, even with the onset of ozone depletion. However, on an annual basis, the long-term relationship between the SAM and near-surface temperatures can be disrupted and even reversed at some stations, although coastal East Antarctica appears stable in this respect. These findings give support to the exploitation of appropriate ice core data to determine longer-term changes in the SAM based upon transfer-functions derived from recent data. Text Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica ice core Unknown Antarctic Antarctic Peninsula Austral East Antarctica |
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English |
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Here we examine the relationship between the Southern Hemisphere (SH) Annular Mode (SAM) and Antarctic near-surface temperatures using data from Antarctic stations for 1957-2004. This near half-century period is significantly longer than analysed in previous studies. Furthermore, the four seasons are considered independently while the longer datasets allow the temporal stability of the relationship to be investigated. A general pattern of positive (negative) correlations between the strength of the SAM and temperatures in the northern Antarctic Peninsula (East Antarctica) is shown to be valid for the last half century but detailed differences are observed between the seasons. These include a change in the sign of the relationship at one station, while at others there are single seasons when temperatures there are or, in some cases, are not significantly related to the SAM. Generally, SAM-temperature correlations are stronger across Antarctica in austral autumn and summer. Estimates of the contribution that trends in the SAM have made to Antarctic near-surface temperature change between 1957 and 2004 are greatest in autumn: in this season they exceed 1°C at half the 14 stations examined with a maximum change of –1.4°C. There does not appear to have been any significant long-term change in the strength of SAM-temperature relationships over the period examined, even with the onset of ozone depletion. However, on an annual basis, the long-term relationship between the SAM and near-surface temperatures can be disrupted and even reversed at some stations, although coastal East Antarctica appears stable in this respect. These findings give support to the exploitation of appropriate ice core data to determine longer-term changes in the SAM based upon transfer-functions derived from recent data. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Gareth J. Marshall High Cross Cb Et |
spellingShingle |
Gareth J. Marshall High Cross Cb Et British |
author_facet |
Gareth J. Marshall High Cross Cb Et |
author_sort |
Gareth J. Marshall |
title |
British |
title_short |
British |
title_full |
British |
title_fullStr |
British |
title_full_unstemmed |
British |
title_sort |
british |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.175.5879 http://nora.nerc.ac.uk/1066/1/Marshall.pdf |
geographic |
Antarctic Antarctic Peninsula Austral East Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula Austral East Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica ice core |
op_source |
http://nora.nerc.ac.uk/1066/1/Marshall.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.175.5879 http://nora.nerc.ac.uk/1066/1/Marshall.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766274120747581440 |