关键词：
早稻生长季;≥10℃积温;变化特征;长沙市
摘 要：
利用1961—2015年长沙市早稻生长季(3月中旬—7月中旬)地面观测资料,采用线性统计、M-K突变检验等统计方法,对近55年长沙市早稻生长季内≥10℃积温的变化特征进行分析。结果表明,1961—2015年长沙市早稻生长季≥10℃活动积温存在明显的上升趋势,20世纪呈波动弱下降趋势,21世纪呈明显上升趋势;突变年份出现在2002年。近55年早稻生长季≥10℃活动积温均值为2 696.4℃·d,最高出现在2008年,为3 147.5℃·d,最低出现在1987年,为2 437.3℃·d,极差为710.2℃·d。
译 名：
≥10 ℃ Accumulated Temperature Variation Characteristics in Early Rice Growing Season in Changsha City
作 者：
CHENG Li-jun;CHEN Xiao-ling;PENG Meng-shuang;Changsha Meteorological Bureau;
关键词：
Early rice growing season;;≥10 ℃ accumulated temperature;;Variation characteristics;;Changsha City
摘 要：
Using ground observation data in early rice growing season( mid Mar.- mid-Jul.) in Changsha City during 1961- 2015,by linear statistics,M-K mutation test and other statistical methods,≥10 ℃ accumulated temperature variation characteristics were analyzed. The results showed that ≥10 ℃ accumulated temperature in early rice growing season in Changsha City during 1961- 2015 presented an upward trend. In the 20 th Century,it was a weak fluctuation decreasing trend,while in the 21 st Century,a significant increasing trend was presented;the mutation occurred in 2002. The mean of ≥10 ℃ accumulated temperature in early rice growing season in recent 55 years was 2 696. 4 ℃·d with the maximum( 3 147. 5 ℃·d) in 2008 and the minimum( 2 437. 3 ℃·d) in 1987,the range was 710. 2 ℃·d.
