Title: Climatic Characteristic and Cause Analysis of Winter Temperature Anomaly in Shanxi Province
Abstract: The temporal and spatial characteristics of winter(from December to February) temperature anomaly in Shanxi Province is analyzed by EOF,synthetic and correlation analysis,using the temperature data at 42 stations in Shanxi Province,NCEP sea level pressure,500 hPa height and the SST of global from 1961 to 2006.And its cause is analyzed from atmospheric circulation and SST.The results show that the decadal variation of temperature in winter is obvious,there is cold period from 1960s to mid 1880s,and a warm period after 1987,especially,the late 1990s to 2004,is the warmest period for the past 46 years.There is a sharp rising trend of winter temperature in Shanxi Province,and climate trend rate is 0.52℃·(10a)-1,while slight regional differences.The regional difference of warming trend is no obvious.The atmospheric circulation in cold and warm winters is significant.The key regions are the Siberia in sea level pressure field,and 500 hPa height in west Loop to east Iran.The impact factors of preceding-autumn are the 500 hPa height in western Pacific,near the Gulf of Mexico,the Canary islands and India of subtropical;the impact factors of preceding-summer are 500 hPa height in west of Tony Lake Loop,Caspian Sea Mediterranean,and the North Atlantic of subtropical.SST of southeast coast of China and south of Japan,and SST at the same period are closely related to the temperature anomaly in winter of Shanxi Province.When the SSTs above areas are warmer(colder),the temperature warmer(colder) in winter.There is a good correlation between the SST of the North Atlantic and Indian Ocean in the early autumn and the winter temperature.When the SST is warmer(colder),the temperature is warmer(colder) in winter.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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