Role of Atmospheric Variability in Driving the “Warm-Arctic, Cold-Continent” Pattern Over the North America Sector and Sea Ice Variability Over the Chukchi-Bering Sea

Guan, Weina; Jiang, Xianan; Ren, Xuejuan; Chen, Gang; Ding, Qinghua

doi:10.1029/2020GL088599

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Role of Atmospheric Variability in Driving the “Warm-Arctic, Cold-Continent” Pattern Over the North America Sector and Sea Ice Variability Over the Chukchi-Bering Sea

2020
By Guan, Weina ; Jiang, Xianan ; Ren, Xuejuan ; ...
Source: Geophysical Research Letters, 47, e2020GL088599

[PDF-3.14 MB]

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Journal Title:

Geophysical Research Letters
Personal Author:

Guan, Weina ; Jiang, Xianan ; Ren, Xuejuan ; Chen, Gang ; Ding, Qinghua

Guan, Weina ; Jiang, Xianan ; Ren, Xuejuan ; Chen, Gang ; Ding, Qinghua Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) Less -
Description:

While the observed decline of sea ice over the Chukchi-Bering Sea (CBS) has coincided with the “warm-Arctic, cold-continent” (WACC) pattern over the North America (NA) sector, there is a debate on the causes of the WACC pattern. Here we present a very similar WACC pattern over the NA sector on both interannual and subseasonal time scales. Lead-lag regression analyses on the shorter time scale indicate that an anomalous anticyclonic circulation over Alaska/Yukon in conjunction with the downward surface turbulent heat flux and long-wave radiation anomalies over CBS leads the formation of the WACC pattern by about 1–2 days, while the latter further leads CBS sea ice reduction by about 3 days. These results indicate that atmospheric variability may play an active role in driving both the WACC pattern over NA and CBS sea ice variability.
Keywords:

[+]

Arctic Warming Atmospheric Variability Large-scale Circulation Sea Ice Loss Surface Air Temperature
Source:

Geophysical Research Letters, 47, e2020GL088599
DOI:

https://doi.org/10.1029/2020GL088599
Document Type:

Journal Article
Funding:

Grant no. NA15OAR4310098 ; Grant no. NA15OAR4310177 ; Grant no. NA17OAR4310261

Grant no. NA15OAR4310098 ; Grant no. NA15OAR4310177 ; Grant no. NA17OAR4310261 Less -
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CC BY
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urn:sha256:489ece14e6404e6ba25dae840726f068b7b66c10471b05e4951c83f95bdf783e
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https://repository.library.noaa.gov/view/noaa/32661/noaa_32661_DS1.pdf
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Role of Atmospheric Variability in Driving the “Warm-Arctic, Cold-Continent” Pattern Over the North America Sector and Sea Ice Variability Over the Chukchi-Bering Sea

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