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2011년 1월의 동아시아 한랭 아노말리 특성
Characteristic Features Observed in the East-Asian Cold Anomalies in January 2011

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Authors
최우갑; 정지연; 전종갑
Issue Date
2013-12
Publisher
한국기상학회
Citation
대기, Vol.23 No.4, pp. 401-412
Keywords
자연과학Cold anomalyEast-Asia winter temperatureharmonic analysisplanetary wave
Abstract
East Asia experienced extremely cold weather in January 2011, while the previousDecember and the following February had normal winter temperature. In this study NationalCenters for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis data are used to investigate the characteristic features observed in the meteorologicalfields such as temperature, sea-level pressure, geopotential height, and wind duringthis winter period. In January the planetary-wave pattern is dominated by stationary-wave formin the mid-to-high latitude region, while transient waves are significant in the previous month.To understand the planetary-wave features quantitatively, harmonic analyses have been donefor the 500-hPa geopotential height field. In the climatological-mean geopotential heights thewave numbers 1, 2, and 3 are dominant during the whole winter. In January 2011 the waves ofnumber 1, 2, and 3 are dominant and stationary as in the climatological-mean field. In December2010 and February 2011, however, the waves of number 4, 5, and 6 play a major role andshow a transient pattern. In addition to the distinctive features in each month the planetarywavepatterns dependent on the latitude are also discussed.
ISSN
1598-3560
Language
Korean
URI
http://hdl.handle.net/10371/93374
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College of Natural Sciences (자연과학대학)Dept. of Earth and Environmental Sciences (지구환경과학부)Journal Papers (저널논문_지구환경과학부)
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