Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions
The difference in the climatological seasonal variation of the net precipitation (precipitation minus evaporation) between the Arctic and the Antarctic was evaluated using ECMWF reanalysis data. Evaluated for simplified polar caps (the regions poleward of 70°N and 67.5°S), over the Arctic, the net p...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/14779 2023-05-15T13:55:39+02:00 Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions Oshima, Kazuhiro Yamazaki, Koji http://hdl.handle.net/2115/14779 https://doi.org/10.1029/2006GL027389 eng eng American Geophysical Union http://www.agu.org/journals/gl/ http://hdl.handle.net/2115/14779 Geophysical Research Letters, 33(L18501) http://dx.doi.org/10.1029/2006GL027389 An edited version of this paper was published by AGU; Copyright 2006, American Geophysical Union, GEOPHYSICAL RESEARCH LETTERS, VOL. 33, L18501 451.3 article (author version) fthokunivhus https://doi.org/10.1029/2006GL027389 2022-11-18T01:01:20Z The difference in the climatological seasonal variation of the net precipitation (precipitation minus evaporation) between the Arctic and the Antarctic was evaluated using ECMWF reanalysis data. Evaluated for simplified polar caps (the regions poleward of 70°N and 67.5°S), over the Arctic, the net precipitation is large in the boreal summer, while over the Antarctic, it is large in the austral winter. The net precipitation depends strongly on the poleward transient moisture flux into the region, which is affected by both the meridional moisture gradient and eddy activity. Thus, the seasonal variation of the poleward transient moisture flux is determined by the relative amplitude of the moisture and eddy factors, that is, by the ratio of the amplitude of the seasonal variation to the annual mean. While both regions have similar relative amplitudes of the eddy factor, the moisture factor in the Arctic is much larger than in the Antarctic. The moisture factor explains the difference in the seasonal variation of the net precipitation. Article in Journal/Newspaper Antarc* Antarctic Arctic Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Antarctic Arctic Austral The Antarctic Geophysical Research Letters 33 18 n/a n/a |
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Open Polar |
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Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
language |
English |
topic |
451.3 |
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451.3 Oshima, Kazuhiro Yamazaki, Koji Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions |
topic_facet |
451.3 |
description |
The difference in the climatological seasonal variation of the net precipitation (precipitation minus evaporation) between the Arctic and the Antarctic was evaluated using ECMWF reanalysis data. Evaluated for simplified polar caps (the regions poleward of 70°N and 67.5°S), over the Arctic, the net precipitation is large in the boreal summer, while over the Antarctic, it is large in the austral winter. The net precipitation depends strongly on the poleward transient moisture flux into the region, which is affected by both the meridional moisture gradient and eddy activity. Thus, the seasonal variation of the poleward transient moisture flux is determined by the relative amplitude of the moisture and eddy factors, that is, by the ratio of the amplitude of the seasonal variation to the annual mean. While both regions have similar relative amplitudes of the eddy factor, the moisture factor in the Arctic is much larger than in the Antarctic. The moisture factor explains the difference in the seasonal variation of the net precipitation. |
format |
Article in Journal/Newspaper |
author |
Oshima, Kazuhiro Yamazaki, Koji |
author_facet |
Oshima, Kazuhiro Yamazaki, Koji |
author_sort |
Oshima, Kazuhiro |
title |
Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions |
title_short |
Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions |
title_full |
Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions |
title_fullStr |
Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions |
title_full_unstemmed |
Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions |
title_sort |
difference in seasonal variation of net precipitation between the arctic and antarctic regions |
publisher |
American Geophysical Union |
url |
http://hdl.handle.net/2115/14779 https://doi.org/10.1029/2006GL027389 |
geographic |
Antarctic Arctic Austral The Antarctic |
geographic_facet |
Antarctic Arctic Austral The Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_relation |
http://www.agu.org/journals/gl/ http://hdl.handle.net/2115/14779 Geophysical Research Letters, 33(L18501) http://dx.doi.org/10.1029/2006GL027389 |
op_rights |
An edited version of this paper was published by AGU; Copyright 2006, American Geophysical Union, GEOPHYSICAL RESEARCH LETTERS, VOL. 33, L18501 |
op_doi |
https://doi.org/10.1029/2006GL027389 |
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Geophysical Research Letters |
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33 |
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18 |
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1766262435658858496 |