Collapse of the 2017 Winter Beaufort High: A Response to Thinning Sea Ice?
Abstract The winter Arctic atmosphere is under the influence of two very different circulation systems: extratropical cyclones travel along the primary North Atlantic storm track from Iceland toward the eastern Arctic, while the western Arctic is characterized by a quasi‐stationary region of high pr...
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| Format: | Article |
| Language: | English |
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Wiley
2018-03-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2017GL076446 |
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| author | G. W. K. Moore A. Schweiger J. Zhang M. Steele |
| author_facet | G. W. K. Moore A. Schweiger J. Zhang M. Steele |
| author_sort | G. W. K. Moore |
| collection | DOAJ |
| description | Abstract The winter Arctic atmosphere is under the influence of two very different circulation systems: extratropical cyclones travel along the primary North Atlantic storm track from Iceland toward the eastern Arctic, while the western Arctic is characterized by a quasi‐stationary region of high pressure known as the Beaufort High. The winter (January through March) of 2017 featured an anomalous reversal of the normally anticyclonic surface winds and sea ice motion in the western Arctic. This reversal can be traced to a collapse of the Beaufort High as the result of the intrusion of low‐pressure systems from the North Atlantic, along the East Siberian Coast, into the Arctic Basin. Thin sea ice as the result of an extremely warm autumn (October through December) of 2016 contributed to the formation of an anomalous thermal low over the Barents Sea that, along with a northward shift of the tropospheric polar vortex, permitted this intrusion. The collapse of the Beaufort High during the winter of 2017 was associated with simultaneous 2‐sigma sea level pressure, surface wind, and sea ice circulation anomalies in the western Arctic. As the Arctic sea ice continues to thin, such reversals may become more common and impact ocean circulation, sea ice, and biology. |
| format | Article |
| id | doaj-art-cbdf264d260f442da99b6d02e216b639 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2018-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-cbdf264d260f442da99b6d02e216b6392025-08-20T02:34:46ZengWileyGeophysical Research Letters0094-82761944-80072018-03-014562860286910.1002/2017GL076446Collapse of the 2017 Winter Beaufort High: A Response to Thinning Sea Ice?G. W. K. Moore0A. Schweiger1J. Zhang2M. Steele3Department of Physics University of Toronto Toronto Ontario CanadaPolar Science Center, Applied Physics Laboratory University of Washington Seattle WA USAPolar Science Center, Applied Physics Laboratory University of Washington Seattle WA USAPolar Science Center, Applied Physics Laboratory University of Washington Seattle WA USAAbstract The winter Arctic atmosphere is under the influence of two very different circulation systems: extratropical cyclones travel along the primary North Atlantic storm track from Iceland toward the eastern Arctic, while the western Arctic is characterized by a quasi‐stationary region of high pressure known as the Beaufort High. The winter (January through March) of 2017 featured an anomalous reversal of the normally anticyclonic surface winds and sea ice motion in the western Arctic. This reversal can be traced to a collapse of the Beaufort High as the result of the intrusion of low‐pressure systems from the North Atlantic, along the East Siberian Coast, into the Arctic Basin. Thin sea ice as the result of an extremely warm autumn (October through December) of 2016 contributed to the formation of an anomalous thermal low over the Barents Sea that, along with a northward shift of the tropospheric polar vortex, permitted this intrusion. The collapse of the Beaufort High during the winter of 2017 was associated with simultaneous 2‐sigma sea level pressure, surface wind, and sea ice circulation anomalies in the western Arctic. As the Arctic sea ice continues to thin, such reversals may become more common and impact ocean circulation, sea ice, and biology.https://doi.org/10.1002/2017GL076446Beaufort HighArctic climateArctic amplificationair‐sea ice interaction |
| spellingShingle | G. W. K. Moore A. Schweiger J. Zhang M. Steele Collapse of the 2017 Winter Beaufort High: A Response to Thinning Sea Ice? Geophysical Research Letters Beaufort High Arctic climate Arctic amplification air‐sea ice interaction |
| title | Collapse of the 2017 Winter Beaufort High: A Response to Thinning Sea Ice? |
| title_full | Collapse of the 2017 Winter Beaufort High: A Response to Thinning Sea Ice? |
| title_fullStr | Collapse of the 2017 Winter Beaufort High: A Response to Thinning Sea Ice? |
| title_full_unstemmed | Collapse of the 2017 Winter Beaufort High: A Response to Thinning Sea Ice? |
| title_short | Collapse of the 2017 Winter Beaufort High: A Response to Thinning Sea Ice? |
| title_sort | collapse of the 2017 winter beaufort high a response to thinning sea ice |
| topic | Beaufort High Arctic climate Arctic amplification air‐sea ice interaction |
| url | https://doi.org/10.1002/2017GL076446 |
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