王燕,王润元,王毅荣,王鹤龄.近37年甘肃省夏季旱涝特征分析[J].干旱地区农业研究,2009,27(3):214~220
近37年甘肃省夏季旱涝特征分析
Study on characteristics of drought-flood in summer in Gansu Province
  
DOI：10.7606/j.issn.1000-7601.2009.03.40
中文关键词:  夏季旱涝  等级评定  空间分布  时间演变  甘肃省
英文关键词:flood-drought in summer  grade of evaluation  spatial distribution  temporal evolution  Gansu Province
基金项目:科技部科研院所社会公益研究专项(2005DIB3J100)再资助项目； 甘肃省自然科学基金(3ZS061-A25-010)
作者单位
王燕 Institute of Arid Meteorology China Meteorological Administration Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province Key Open Laboratory of Arid Change and Disaster Reduction of CMA, Lanzhou 730020, China；School of Environmental and Municipal Engineering Lanzhou Jiaotong University, Lanzhou 730070, China 
王润元 Institute of Arid Meteorology China Meteorological Administration Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province Key Open Laboratory of Arid Change and Disaster Reduction of CMA, Lanzhou 730020, China；School of Environmental and Municipal Engineering Lanzhou Jiaotong University, Lanzhou 730070, China 
王毅荣 Institute of Arid Meteorology China Meteorological Administration Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province Key Open Laboratory of Arid Change and Disaster Reduction of CMA, Lanzhou 730020, China 
王鹤龄 Institute of Arid Meteorology China Meteorological Administration Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province Key Open Laboratory of Arid Change and Disaster Reduction of CMA, Lanzhou 730020, China 
摘要点击次数: 97
全文下载次数: 103
中文摘要:
      选取甘肃省61个气象站1965~2001年共37 a夏季(68月)逐日降水资料,应用正态化Z指数变换,对甘肃省夏季降水进行了旱涝等级划分,并应用EOF、REOF、Maxican hat小波分析等方法对旱涝发生的空间分布和时间演变规律进行了研究。结果表明,就整个夏季而言,干旱出现机率明显高于雨涝;6~7月旱涝机率均等,7~8月较重干旱的出现机率明显高于较重雨涝。甘肃省夏季旱涝主要存在3种变化模态,并可将旱涝分为5个敏感区。甘肃省旱涝从26 a以上尺度范围看呈干旱化趋势,旱涝准4 a周期在各个年代均比较显著。
英文摘要:
      Based on the daily precipitation data of 61 meteorological stations in Gansu Province during the period of 1965～2001, the grades of flood-drought in summer (June-August) were evaluated with Z index, the methods of EOF, REOF and Maxican hat wavelet analysis were used, and the characteristics of the spatial anomaly and temporal evolution rule of summer flood-drought in Gansu Province were analyzed.The results showed as follows: firstly, as a whole system, the probability of occurrence of drought in summer was greater than that of flood;for a single month, the frequency of flood was equal to that of drought in June and July, while the frequency of relative severe drought was higher than that of flood in July and August;secondly, there were three models representing the spatial distribution of flood-drought in Gansu, and the province could be divided into five regions of flood-drought sensitivity;finally, the jumping points of flood-drought varied in different temporal scales, there was a increasingly dry trend in the long period of 26 years and a distinct 4-year cycle in very 10-year period.
查看全文  查看/发表评论  下载PDF阅读器