Author:
Wendler G.,Chen L.,Moore B.
Abstract
During the first decade of the 21st century most of Alaska experienced a cooling shift, modifying the long-term
warming trend, which has been about twice the global change up to this time. All of Alaska cooled with the exception of
Northern Regions. This trend was caused by a change in sign of the Pacific Decadal Oscillation (PDO), which became
dominantly negative, weakening the Aleutian Low. This weakening results in less relatively warm air being advected
from the Northern Pacific. This transport is especially important in winter when the solar radiation is weak. It is during
this period that the strongest cooling was observed. In addition, the cooling was especially pronounced in Western Alaska,
closest to the area of the center of the Aleutian Low. The changes seen in the reanalyzed data were confirmed from
surface observations, both in the decrease of the North-South atmospheric pressure gradient, as well as the decrease in the
mean wind speeds for stations located in the Bering Sea area.
Publisher
Bentham Science Publishers Ltd.
Cited by
27 articles.
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