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Northern Hemisphere winter snow anomalies: ENSO, NAO and the winter of 2009/10

Richard Seager; Yochanan Kushnir; Jennifer A. Nakamura; Mingfang Ting; Naomi H. Naik

Title:
Northern Hemisphere winter snow anomalies: ENSO, NAO and the winter of 2009/10
Author(s):
Seager, Richard
Kushnir, Yochanan
Nakamura, Jennifer A.
Ting, Mingfang
Naik, Naomi H.
Date:
Type:
Articles
Department:
Lamont-Doherty Earth Observatory
Volume:
37
Permanent URL:
Book/Journal Title:
Geophysical Research Letters
Abstract:
Winter 2009/10 had anomalously large snowfall in the central parts of the United States and in northwestern Europe. Connections between seasonal snow anomalies and the large scale atmospheric circulation are explored. An El Niño state is associated with positive snowfall anomalies in the southern and central United States and along the eastern seaboard and negative anomalies to the north. A negative NAO causes positive snow anomalies across eastern North America and in northern Europe. It is argued that increased snowfall in the southern U.S. is contributed to by a southward displaced storm track but further north, in the eastern U.S. and northern Europe, positive snow anomalies arise from the cold temperature anomalies of a negative NAO. These relations are used with observed values of NINO3 and the NAO to conclude that the negative NAO and El Niño event were responsible for the northern hemisphere snow anomalies of winter 2009/10.
Subject(s):
Environmental science
Publisher DOI:
http://dx.doi.org/10.1029/2010GL043830
Item views:
115
Metadata:
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