Interdecadal Variation of Wintertime Blocking Frequency over the Siberia
(주)코리아스칼라
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- 2016.04.02
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- 2007.09
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서지정보
ㆍ발행기관 : 한국지구과학회
ㆍ수록지정보 : 한국지구과학회지 / 28권 / 5호
ㆍ저자명 : Lee, Hyun-Soo, Jhun, Jong-Ghap, Kang, In-Sik, Moon, Byung-Kwon
영어 초록
The interdecadal variation of wintertime blocking frequency over the Siberia (60˚E-140˚E) is examined using the ECMWF/NCEP-NCAR re-analysis data for the period 1958-2006. The wintertime blocking frequency over the Siberia significantly decreased for the period 1986-2006, compared to the period 1958-1985, which is mainly due to the anomalous circulation of 500-hPa geopotential height field. During the period 1986-2006, there was enhancement in both the anomalous cyclonic flow over the western Siberia and the anomalous anticyclonic flow over the east Asia. These anomalous circulation patterns, which might be associated with changes in surface temperatures over the Asian continent, are suspected to playa possibly important role as an obstacle to the formation of blocking flow over the Siberia.
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