The 2020 Siberian heat wave
Abstract Siberia saw a heat wave of extreme monthly temperatures of +6°C anomalies from January through May 2020, culminating with near daily temperature records at the Arctic station of Verhojansk in mid‐June. This was a major Arctic event. The proximate cause for the warm extremes from January thr...
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crwiley:10.1002/joc.6850 2024-09-15T18:08:06+00:00 The 2020 Siberian heat wave Overland, James E. Wang, Muyin Climate Program Office Joint Institute for the Study of the Atmosphere and Ocean 2020 http://dx.doi.org/10.1002/joc.6850 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6850 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.6850 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6850 en eng Wiley http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ International Journal of Climatology volume 41, issue S1 ISSN 0899-8418 1097-0088 journal-article 2020 crwiley https://doi.org/10.1002/joc.6850 2024-08-30T04:12:06Z Abstract Siberia saw a heat wave of extreme monthly temperatures of +6°C anomalies from January through May 2020, culminating with near daily temperature records at the Arctic station of Verhojansk in mid‐June. This was a major Arctic event. The proximate cause for the warm extremes from January through April was the record strength of the stratospheric polar vortex (SPV) and tropospheric jet stream. The SPV and high geopotential heights to the south combined to provide strong zonal winds from the west that reduced the potential penetration of cold air from the north. An index of vortex strength is the Arctic Oscillation (AO); averaged over January–April, the AO set extreme positive records in 1989, 1990, and 2020 (baseline starting in 1950). The strength and stability of the SPV over the central Arctic contributed to the winter–spring persistence of the heat wave in Siberia. May–June temperatures were related to high tropospheric geopotential heights over Asia. An open question is whether these dynamic events are becoming more persistent. Such record events will not occur every year but one can expect that they will occasionally naturally reoccur over the next decades due to internal atmospheric variability in addition to a continued global warming background. Article in Journal/Newspaper Global warming Siberia Wiley Online Library International Journal of Climatology 41 S1 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Siberia saw a heat wave of extreme monthly temperatures of +6°C anomalies from January through May 2020, culminating with near daily temperature records at the Arctic station of Verhojansk in mid‐June. This was a major Arctic event. The proximate cause for the warm extremes from January through April was the record strength of the stratospheric polar vortex (SPV) and tropospheric jet stream. The SPV and high geopotential heights to the south combined to provide strong zonal winds from the west that reduced the potential penetration of cold air from the north. An index of vortex strength is the Arctic Oscillation (AO); averaged over January–April, the AO set extreme positive records in 1989, 1990, and 2020 (baseline starting in 1950). The strength and stability of the SPV over the central Arctic contributed to the winter–spring persistence of the heat wave in Siberia. May–June temperatures were related to high tropospheric geopotential heights over Asia. An open question is whether these dynamic events are becoming more persistent. Such record events will not occur every year but one can expect that they will occasionally naturally reoccur over the next decades due to internal atmospheric variability in addition to a continued global warming background. |
author2 |
Climate Program Office Joint Institute for the Study of the Atmosphere and Ocean |
format |
Article in Journal/Newspaper |
author |
Overland, James E. Wang, Muyin |
spellingShingle |
Overland, James E. Wang, Muyin The 2020 Siberian heat wave |
author_facet |
Overland, James E. Wang, Muyin |
author_sort |
Overland, James E. |
title |
The 2020 Siberian heat wave |
title_short |
The 2020 Siberian heat wave |
title_full |
The 2020 Siberian heat wave |
title_fullStr |
The 2020 Siberian heat wave |
title_full_unstemmed |
The 2020 Siberian heat wave |
title_sort |
2020 siberian heat wave |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/joc.6850 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6850 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.6850 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6850 |
genre |
Global warming Siberia |
genre_facet |
Global warming Siberia |
op_source |
International Journal of Climatology volume 41, issue S1 ISSN 0899-8418 1097-0088 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/joc.6850 |
container_title |
International Journal of Climatology |
container_volume |
41 |
container_issue |
S1 |
_version_ |
1810445451279728640 |