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中国农学通报 ›› 2014, Vol. 30 ›› Issue (26): 231-235.doi: 10.11924/j.issn.1000-6850.2014-0030

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

近 60年大连市不同等级降水量与降水日数的变化特征

王秀萍 祝青林 侯彦泽   

  • 收稿日期:2014-01-03 修回日期:2014-02-19 出版日期:2014-09-15 发布日期:2014-09-15
  • 基金资助:
    国家公益性行业专项 “近百年来全球陆地气候变化检测技术与应用” (GYHY201206012)。

Variation Characteristics of Precipitation and Precipitation Days with Different Grades over Dalian in Recent 60 Years

  • Received:2014-01-03 Revised:2014-02-19 Online:2014-09-15 Published:2014-09-15

摘要: 为了研究掌握不同等级降水量和降水日数演变规律,合理利用降水资源,更好地服务于农业生产。根据大连市1951—2010年逐日降水资料,利用线性趋势和Mann-Kendall突变检验等方法,对大连市不同等级降水量和降水日数的变化特征进行分析。结果表明:年降水量和降水日数均呈减少趋势,降水日数的减少更加显著。小雨量和大雨量(日数)显著减少,中雨量(日数)则呈增加趋势,暴雨量(日数)减少趋势不明显。降水量(日数)的季节变化明显,其中夏、秋、冬季降水量(日数)呈减少趋势,而春季降雨量(日数)呈增加趋势。降水强度春季显著增大,夏、秋季显著减小,而冬季有微弱的下降趋势。春季发生极端降水事件的概率增加,尤其是进入21世纪以来更加明显。年降水日数在1978年发生1次明显突变。

关键词: 养分, 养分

Abstract: Aimed to study and master the evolution of different grades about precipitation and precipitation days for giving a better suggestion of rainwater resources management and better services for agricultural production,, variation characteristics of precipitation and precipitation days were analyzed with line trend analysis and Mann-Kendall test methods based on daily precipitation data from 1951 to 2010 in Dalian. The results show that annual precipitation and rainy days decrease, and the decrease of annual precipitation days is more obvious. Light and heavy rainfall (days) shows the decreasing , moderate rainfall (days) showing the increasing , but the decreasing trend of torrential rainfall (days) is not unremarkable. The seasonal distribution of precipitation also changes significantly. Rainfall (days) in summer, autumn and winter reduce, but rainfall (days) in spring increase. Precipitation intensity has an evident increasing in spring and a decreasing in summer, autumn and winter, but the decline of precipitation intensity is not obvious in winter. On the other hand, the extreme precipitation events in spring will increase , and it is more obvious in the 21st century particularly. The obvious abrupt changes of annual precipitation days occures in 1978.