作　　者： (刘川）; (查轩）; (黄少燕）; (陈世发）; (康佩佩）; (白永会）; (戴金梅）; (王丽园）;

机构地区： 福建省亚热带资源与环境重点实验室福建师范大学地理科学学院,福建福州350007

出　　处： 《亚热带水土保持》 2017年第3期17-27,64,共12页

摘　　要： 基于闽北地区1980~2009年17个气象站点逐日降水数据资料,运用线性倾向估计、滑动平均法、MannKendall突变性分析法、反距离加权插值法,分析近30年来闽北地区降水的时空变化特征。结果表明:(1)时间上,闽北地区近30年降水量和降水天数变化呈略微下降趋势,其中2~4月降水量呈现显著的减小趋势,6、8、12月降水量呈现显著的增加趋势。降水量突变发生时间在1988年、2007年。(2)春季小雨、中雨、大雨和夏季小雨、中雨以及秋季小雨等级降水量表现出明显的减少趋势,而夏季暴雨有明显增大趋势。闽北地区四季降水总时间和四季小雨以及春季、夏季中雨等级降水天数均出现明显减小趋势,而夏季暴雨天数呈现明显增加趋势。(3)空间上,闽北地区多年降水量及降水天数空间分布存在明显区域差异。各等级降水量及降水天数高值区位于该地区东北部的七步、寿宁、柘荣、光泽、浦城等地,低值区位于闽北地区东南部的洋中坂等地。 It was analyzed the spatial temporal variation characteristics of precipitation in north part of Fujian Province from 1980 -2009 based on the daily precipitation data from 17 meteorological stations and adjacent to the basin. The employed methods including the linear regression,moving average,Mann - Kendall test and inverse distance weighted were used to delineate the rate of change, abrupt change points, and statistical significance of the trends. The results showed that, （T）the average annual precipitation and rainfall days appeared a slight downward trend in north part of Fujian Province. Of which, rainfall had the decreasing trend obviously from February to April while the increasing trend significantly in June, August and December. Precipitation mutations have occurred in 1988 and 2007.②The precipitation of light rain as well as moderate rain and heavy rain in spring was decreased. The precipitation of light rain and moderate rain in summer had an incrementally decreasing trend. The precipitation of light rain was decreased in autumn. While the precipitation of rainstorm was increased for summer. The annual rainfall days, the rainfall days of light rain for all seasons, the rainfall days of moderate rain in spring and summer showed a strong decreasing trend. While the rainfall days of rainstorm in summer appeared the increasing trend.③The spatial variations of annual precipitation and rainfall days for different seasons were significant in north part of Fujian Province. It was found that the precipitation and rainfall days of high value area is located in Qibu, Shouning, Zherong, Guangze and Pucheng Coun-ties ,while the low value area is located in Yangzhongban at south - east part of north Fujian Province.

关 键 词： 闽北地区 降水 降水天数 线性倾向估计 法 时空分布