摘要
该文利用罗城县1958—2011年日照时数、降水量和气温的观测资料,采用线性趋势分析、累积距平、MannaKendall检验等方法,对作物生长季(5—9月)农业光照资源、热量资源、水资源的变化特征、突变情况进行分析讨论。分析表明:近54 a来,罗城县生长季的日照时数有下降趋势,在1991年发生了由多到少的突变;平均气温、活动积温有上升趋势,活动积温在1997年发生了由少到多的突变;年降雨量在增加,但降雨日数在显著减少,大雨日数和暴雨以上日数均不显著增加。
In order to understand the characteristics and trends of climate resource changes in Luocheng,and provide the decision- making basis for government to adjust agricultural and rural economic structure and guide agricultural production,the observation data of sunshine duration,precipitation and air temperature in 1958—2011were utilized to analyze the changes of agricultural light resources,thermal resources and water resources during the growing season（ from May to September）,by the methods of linear trend analysis,cumulative anomaly,Mann-Kendall test,and so on. The results show that the sunshine duration in the growing season of Luocheng County had a decreasing tendency in the past 54 years,and there were more to fewer abrupt changes in 1991. The average temperature and active accumulated temperature had an increasing trend,and in 1997,an abrupt change from less to more occurred in view of active accumulated temperature. The annual precipitation was increasing,but the number of rain days decreased significantly,and the number of heavy rain days and rainstorm days were not significant increased.
出处
《贵州气象》
2016年第5期78-82,共5页
Journal of Guizhou Meteorology
