摘要
利用统计学分析方法对辽宁西部代表站1953—2010年主汛期降水量进行研究。结果表明,辽宁西部地区主汛期降水量存在显著的减少趋势,气候倾向率为-12.56mm/10a,存在8~9年的周期变化和18年的准周期变化。1980年主汛期降水量发生显著突变,突变之后降水量减少了12.5%。非汛期降水量变化较平稳,有微弱的增加趋势。
Using statistical analysis methods,precipitation variation characteristion in main flood season of western Liaoning in 1953—2010 was studied.The results showed that：precipitation in main flood season of western Liaoning significantly reduced and climate tendency rate was-12.56 mm/10a,and existed the periodic variation of 8-9a and the quasi-periodic changes of 18a.Precipitation in main flood season occurred significant mutations in 1980,precipitation decreased by 12.5% after the mutation.Precipitation change in non-flood season was relatively stable,and had slightly increasing trend.
出处
《宁夏农林科技》
2013年第4期113-114,124,共3页
Journal of Ningxia Agriculture and Forestry Science and Technology
关键词
辽宁西部
主汛期
线性趋势
周期变化
突变
Western Liaoning
Main flood season
Linear trend
Periodic change
Mutation
