Temperature variation in the South Orkney Islands, maritime Antarctic
Abstract Meteorological records at Signy Station in the South Orkney Islands (SOIs) have recently been digitized to cover the period of 1947–1995. This study compares the newly available near‐surface air temperatures at Signy with those from a nearby station, Orcadas and with reanalysis datasets to...
Published in: | International Journal of Climatology |
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Online Access: | http://dx.doi.org/10.1002/joc.8302 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8302 |
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crwiley:10.1002/joc.8302 2024-06-02T07:56:57+00:00 Temperature variation in the South Orkney Islands, maritime Antarctic Lu, Hua Cowell, Steve King, John Orr, Andrew Phillips, Tony Dobb, Emilia Xue, Jonathan Kucieba, Sabina Phillips, Guy Marshall, Gareth British Antarctic Survey Natural Environment Research Council 2023 http://dx.doi.org/10.1002/joc.8302 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8302 en eng Wiley http://creativecommons.org/licenses/by/4.0/ International Journal of Climatology volume 43, issue 16, page 7987-8004 ISSN 0899-8418 1097-0088 journal-article 2023 crwiley https://doi.org/10.1002/joc.8302 2024-05-03T10:55:37Z Abstract Meteorological records at Signy Station in the South Orkney Islands (SOIs) have recently been digitized to cover the period of 1947–1995. This study compares the newly available near‐surface air temperatures at Signy with those from a nearby station, Orcadas and with reanalysis datasets to provide a more comprehensive picture of the weather and climate variability in the SOIs. Temperatures from both stations show a higher degree of variability in winter than summer, but the variability differs in terms of its relationship to the dominant wind directions and sea ice influences. The two stations differ markedly in terms of their respective warm temperature events, largely due to orography‐induced föhn winds at Signy Station as northwesterlies flow over Coronation Island. ERA5 reproduces the monthly to annual averages exceedingly well but underestimates both cold and warm tails of station temperatures. Temperature trends in the SOIs are also considered in terms of changes in large‐scale circulation and the sea surface temperature over the Brazil‐Falkland Confluence. However, caution is required in interpreting the long‐term temperature trends estimated from reanalysis data as most of the reanalyses show a cold bias before 1979, which is most likely caused by misrepresentation of the sea ice. Article in Journal/Newspaper Antarc* Antarctic Coronation Island Sea ice South Orkney Islands Wiley Online Library Antarctic Coronation Island ENVELOPE(-45.588,-45.588,-60.595,-60.595) Orcadas ENVELOPE(-44.717,-44.717,-60.750,-60.750) Signy Station ENVELOPE(-45.600,-45.600,-60.717,-60.717) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) International Journal of Climatology 43 16 7987 8004 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Meteorological records at Signy Station in the South Orkney Islands (SOIs) have recently been digitized to cover the period of 1947–1995. This study compares the newly available near‐surface air temperatures at Signy with those from a nearby station, Orcadas and with reanalysis datasets to provide a more comprehensive picture of the weather and climate variability in the SOIs. Temperatures from both stations show a higher degree of variability in winter than summer, but the variability differs in terms of its relationship to the dominant wind directions and sea ice influences. The two stations differ markedly in terms of their respective warm temperature events, largely due to orography‐induced föhn winds at Signy Station as northwesterlies flow over Coronation Island. ERA5 reproduces the monthly to annual averages exceedingly well but underestimates both cold and warm tails of station temperatures. Temperature trends in the SOIs are also considered in terms of changes in large‐scale circulation and the sea surface temperature over the Brazil‐Falkland Confluence. However, caution is required in interpreting the long‐term temperature trends estimated from reanalysis data as most of the reanalyses show a cold bias before 1979, which is most likely caused by misrepresentation of the sea ice. |
author2 |
British Antarctic Survey Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Lu, Hua Cowell, Steve King, John Orr, Andrew Phillips, Tony Dobb, Emilia Xue, Jonathan Kucieba, Sabina Phillips, Guy Marshall, Gareth |
spellingShingle |
Lu, Hua Cowell, Steve King, John Orr, Andrew Phillips, Tony Dobb, Emilia Xue, Jonathan Kucieba, Sabina Phillips, Guy Marshall, Gareth Temperature variation in the South Orkney Islands, maritime Antarctic |
author_facet |
Lu, Hua Cowell, Steve King, John Orr, Andrew Phillips, Tony Dobb, Emilia Xue, Jonathan Kucieba, Sabina Phillips, Guy Marshall, Gareth |
author_sort |
Lu, Hua |
title |
Temperature variation in the South Orkney Islands, maritime Antarctic |
title_short |
Temperature variation in the South Orkney Islands, maritime Antarctic |
title_full |
Temperature variation in the South Orkney Islands, maritime Antarctic |
title_fullStr |
Temperature variation in the South Orkney Islands, maritime Antarctic |
title_full_unstemmed |
Temperature variation in the South Orkney Islands, maritime Antarctic |
title_sort |
temperature variation in the south orkney islands, maritime antarctic |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/joc.8302 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8302 |
long_lat |
ENVELOPE(-45.588,-45.588,-60.595,-60.595) ENVELOPE(-44.717,-44.717,-60.750,-60.750) ENVELOPE(-45.600,-45.600,-60.717,-60.717) ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Coronation Island Orcadas Signy Station South Orkney Islands |
geographic_facet |
Antarctic Coronation Island Orcadas Signy Station South Orkney Islands |
genre |
Antarc* Antarctic Coronation Island Sea ice South Orkney Islands |
genre_facet |
Antarc* Antarctic Coronation Island Sea ice South Orkney Islands |
op_source |
International Journal of Climatology volume 43, issue 16, page 7987-8004 ISSN 0899-8418 1097-0088 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/joc.8302 |
container_title |
International Journal of Climatology |
container_volume |
43 |
container_issue |
16 |
container_start_page |
7987 |
op_container_end_page |
8004 |
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1800737206156918784 |