摘要
[目的]研究近50年辽宁本溪满族自治县气温和降水量变化特征。[方法]利用1961~2010年本溪满族自治县气象观测资料,采用常规数理统计方法,对该县单站较小尺度的气温、降水年代际气候特征变化进行分析。[结果]1961~2010年本溪满族自治县气温年均值为7.0℃,历年年平均气温随着年份的变化趋势升高明显,气候倾向率达0.517℃/10a,近50年趋势升高2.6℃;近10年比20世纪60年代平均升高2.0℃,而近20年平均气温升高不明显;春、夏、秋、冬季气温存在不同程度的升高趋势,其中以冬季最为明显。年降水量、四季降水量变率较大,稳定性较差;历年平均降水量为781 mm,年降水量呈下降趋势,气候倾向率为-16.941 mm/10a;春季和冬季降水量呈增加趋势,夏季和秋季呈减少趋势,且春季和冬季降水量变率大于夏季和秋季。[结论]该研究为大尺度气候分析提供气候背景,也为当地管理部门了解和掌握地方性气候变化特征、防灾减灾提供依据。
[Objective] The aim was to study the variation characteristics of temperature and precipitation in Benxi Manchu Autonomous County of Liaoning in recent 50 years.[Method] By using meteorological observational data in Benxi Manchu Autonomous County during 1961-2010,and the conventional mathematical statistics method was adopted to analyze the variation characteristics of smaller scale temperature,precipitation decadal climate of this county.[Result] The annual average temperature in Benxi Manchu Autonomous County of Liaoning was 7.0 ℃ during 1961-2010,annual average temperature over the years increased obviously with the year,and climate trend rate was 0.517 ℃/10 a,moreover,the trend increased by 2.6 ℃ in recent 50 years;in recent 10 years the trend increased by 2.0 ℃ than 1960s,however,in recent 20 years,the average temperature had not any increasing trend;temperature of spring,summer,autumn and winter had increasing trend to different degree,especially in winter.The larger the variability of annual precipitation,seasonal precipitation,the poor the stability;average precipitation over the years was 781 mm,annual precipitation showed decreasing trend,furthermore,precipitation in spring and winter was more than summer and winter.[Conclusion] The study provided climatic background for large scale climatic analysis,and also provided basis for understanding and grasping variation characteristics of local climate and disaster prevention.
出处
《安徽农业科学》
CAS
北大核心
2011年第16期9928-9930,共3页
Journal of Anhui Agricultural Sciences
关键词
气温
降水
特征分析
辽宁本溪满族自治县
Temperature
Precipitation
Feature analysis
Benxi Manchu Autonomous County in Liaoning
