该文根据本溪市国家基本气象站的1956-2012年逐日平均气温的观测资料，采用5d滑动平均气温法，分析了1956-2012年间本溪市区四季开始的平均日期、四季的持续天数。结果表明：1956-2012年间，本溪市区四季开始的平均日期分别为：4月20日、6月30日、8月15日和10月9日，四季开始时间的气候倾向率分别为0、2.6d/10a、1.5d/10a、1.7d/10a；四季持续的平均天数分别为70d、47d、55d、193d，四季持续天数的气候倾向率分别为-1.8d/10a、4d/10a、0.3d/10a和-1.3d/10a。%Based on the daily mean temperature data from 1956 to 2012 in Benxi City,the start and sus-tained times of four seasons were analyzed by the method of 5d moving mean temperature. The result showed that the start time of four seasons were April 20、June 30、August 15 and October 9,the tendency rate of climate change was 0、-2.6d/10a、1.5d/10a and 1.7d/10a;the sustained times of four seasons were 70d、47d、55d and 193d, the tendency rate of climate change was -1.8d/10a、4d/10a、0.3d/10a and -1.3d/10a.
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