Details:

Journal Title:
Geophysical Research Letters
Personal Author:
Moore, G. W. K. ; Schweiger, A. ; Zhang, J. ; Steele, M.
Moore, G. W. K. ; Schweiger, A. ; Zhang, J. ; Steele, M. Less -
NOAA Program & Office:
OAR (Oceanic and Atmospheric Research)
Description:
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.
Keywords:
[+]
General Earth And Planetary Sciences Geophysics
Source:
Geophysical Research Letters, 45(6), 2860-2869
DOI:
https://doi.org/10.1002/2017gl076446
ISSN:
0094-8276;1944-8007;
Format:
PDF
Publisher:
American Geophysical Union (AGU)
Document Type:
Journal Article
Funding:
Grant no. NA15OAR4310162
Rights Information:
Other
Compliance:
Library
Main Document Checksum:
[+]
urn:sha256:83c8e0a3e602a5664eef1a1445c182331604b8f2f77e7851fd88fd85f81a17aa
Download URL:
https://repository.library.noaa.gov/view/noaa/59759/noaa_59759_DS1.pdf
File Type:

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