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Abrupt temperature change and detection in Meizhou region

Gu Lin,Xie Longsheng,Kong Yuanxia,Pan Guangyue (Jiaoling Meteorological Bureau of Guangdong,Jiaoling 514100)  
Based on the annual and seasonal mean air temperature data from 1953 to 2007 of Meixian,the characteristics of abrupt temperature change are analyzed by using three mutation detection methods of cumulative departure,Mann-Kendall test and moving T-test.The results show that the warming trend exists in the whole year and the winter is obvious.The ratio of mean air temperature in winter is 0.022 1 ℃/a,and is about 0.0113 ℃/a in the whole year.The jumping point of annual temperature is tested during 1997~1998 by using the cumulative departure,Mann-Kendall test and moving T-test.The jumping point of winter temperature is tested in 1986 by using the cumulative departure and moving T-test,while the jumping point in 1997 is tested by using the Mann-Kendall.
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