Journal
INTERNATIONAL JOURNAL OF CLIMATOLOGY
Volume 32, Issue 13, Pages 2081-2087Publisher
WILEY
DOI: 10.1002/joc.2400
Keywords
Artic Sea Ice; January 2008 Snowstorm in China; AGCM
Categories
Funding
- 'Hundred Talent Program' of the Chinese Academy of Sciences
- National Natural Science Foundation of China [40930848, 40876099]
- National Key Technology RD Program [2008AA121 704, 2011BAC03B02]
- China-Canada Polar Cooperation Project of State Oceanic Administration [QT06-13]
- Physical Oceanography Research of Chinese Forth Arctic Expedition
- National Basic Research Program of China [2011CB309704, 2010CB950301]
- FIO Special Fund Basic Research and Operating Expenses [2008T27, 2010T01]
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We conduct numerical experiments with an atmospheric general circulation model to answer the question whether the extreme Arctic sea ice anomaly in 2007 contributed to the severe January 2008 snowstorm in China. Results show that the record low Arctic sea ice in September 2007, and follow-up slow recovery of the Arctic sea ice in October and November 2007 could excite two stationary wave structures. One wave train propagates southeastward from the Barents/Kara Seas to central Asia, strengthening the Middle East Jet Stream (MEJS), and the other wave train propagates southward from central Arctic Ocean/eastern Siberia Sea to the mid-latitude and subtropics of the north Pacific, weakening the East Asian Jet Stream (EAJS). The anomalous westerlies associated with the strengthening of the MEJS and the anomalous easterlies associated with the weakening of the EAJS form a strong convergence zone over central and southern China, providing favorable conditions for the severe January 2008 snowstorm. Copyright (c) 2011 Royal Meteorological Society
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