瓦房店地区农业气候资源变化特征

应用气候倾向率、有序聚类分析等数理统计方法,分析了瓦房店地区1961—2010年气温、降水、日照等资料。结果表明,瓦房店地区年平均气温有明显升高趋势,平均每10 a升高0.201℃,其中,冬季增温最为显著,平均每10 a升高0.443℃;稳定通过0,10℃的活动积温呈明显上升趋势,平均每10 a分别增加32.2,26.9℃.d。年降水量呈减少趋势,其中,春季降水增加,夏秋冬季减少。日照时数呈明显减少趋势。气温突变在1985年,突变后气温升高0.7℃;降水量突变不明显;日照时数突变在1984年,突变后日照时数平均减少281.2 h。

Agricultural Climate Resources Variation Characteristics in Wafangdian Prefecture

In this article,we applied climate tendency rate,orderly cluster analysis and other mathematical statistics methods to analyze the temperature,precipitation,sunshine and other information in Wafangdian from 1961 to 2010.The results showed,in Wafangdian,the annual average temperature rose remarkably by mean 0.201 ℃ in every 10 years.The temperature rose most significantly in winter by mean 0.443 ℃ every 10 years.The annual precipitation was decreasing.The precipitation increased in springs,but decreased in summers,winters and autumns.The hours of sunshine was obviously decreased.Abrupt variation of temperature happened in 1985 when the temperature rose by 0.7 ℃;there was no obvious abrupt variation of precipitation;abrupt variation of hours of sunshine happened in 1984 when the average hours of sunshine decreased 281.2 h compared with the years before and after.