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Arctic warming, increasing snow cover and widespread boreal winter cooling

Environmental research letters, 2012-01, Vol.7 (1), p.014007 [Peer Reviewed Journal]

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Title:
Arctic warming, increasing snow cover and widespread boreal winter cooling
Author: Cohen, Judah L ; Furtado, Jason C ; Barlow, Mathew A ; Alexeev, Vladimir A ; Cherry, Jessica E
Subjects: Arctic Oscillation ; global warming ; prediction ; snow cover ; winter trends
Is Part Of: Environmental research letters, 2012-01, Vol.7 (1), p.014007
Description: The most up to date consensus from global climate models predicts warming in the Northern Hemisphere (NH) high latitudes to middle latitudes during boreal winter. However, recent trends in observed NH winter surface temperatures diverge from these projections. For the last two decades, large-scale cooling trends have existed instead across large stretches of eastern North America and northern Eurasia. We argue that this unforeseen trend is probably not due to internal variability alone. Instead, evidence suggests that summer and autumn warming trends are concurrent with increases in high-latitude moisture and an increase in Eurasian snow cover, which dynamically induces large-scale wintertime cooling. Understanding this counterintuitive response to radiative warming of the climate system has the potential for improving climate predictions at seasonal and longer timescales.
Publisher: IOP Publishing
Language: English
Identifier: ISSN: 1748-9326
EISSN: 1748-9326
DOI: 10.1088/1748-9326/7/1/014007
CODEN: ERLNAL
Source: IOP Publishing Free Content

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