摘要
利用山西朔州观测站1956~2010年逐月降水量资料,应用统计方法和线性分析法进行统计分析。通过对近55 a朔州市年降水量变化趋势、关键期(4~9月)降水距平变化趋势以及4季降水距平变化趋势的分析,得出朔州市年降水量总体呈9.1 mm/10 a的下降趋势;关键期降水距平呈2.5mm/10 a的下降趋势。而且冬季有向湿润化发展的倾向,春季和夏季呈干旱发展趋势。55 a来朔州出现干旱年15 a,其中有5 a为重旱年。
Based on the monthly and annual precipitation data from 1956 to 2010 at Shuozhou meteorological observation station, the variation of annual precipitation, the precipitation anomaly during the critical period ( April - September) and the seasonal precipitation anomaly in recent 55 years in Shuozhou of Shanxi Province were analyzed by using statistical and linear analysis methods. The result in- dicated that the annual precipitation of declined with the rate of 9.1 mm/10 a, and the precipitation anomaly during the critical period declined with the rate of 2.5 ram/10 a. In addition, it presented wet trend in winter and drought tendency in spring and summer. There were15 dry years in 55 years, and in which 5 years were severe drought years. Finally, some measures to deal with agriculture drought were put forward in this paper.
出处
《干旱气象》
2012年第3期327-331,共5页
Journal of Arid Meteorology
基金
国家重点基础研究发展规划项目"干旱化及其阶段性转折对我国粮食
水和土地资源安全的影响及适应对策"(2006CB400505)资助
关键词
气象干旱
趋势分析
防御措施
meteorological drought
trend analysis
defensive measures