摘要
对全省127个雨量代表站1956-2018年系列多时间尺度降水资料统计的基础上,按照四季分配方法确定了全省夏季(6-8月)降水量占比及变化规律。然后采用Mexican hat小波、月旬占比和典型场次柱状图、Bonsal、EOF和REOF等方法对夏季降水量的年际、年内和极端天气变化趋势进行分析和研究。研究结果表明甘肃夏季降水量存在明显的流域、区域、时间、集中期、强度和量级差异特征。
For the 127 series from 1956 to 2018 which is the typical station,on the basis of multiple time scale precipitation data statistics,according to the distribution method to determine the province of the four seasons summer( June-August) precipitation change rule of ratio and then USES the Mexican hat wavelet on meadow proportion and typical events histogram Bonsal EOF and REOF methods of summer precipitationinterannual changes during the year and extreme weather trend analysis and research. The results show that the summer precipitation in Gansu province has obvious characteristics of regional intensity and magnitude difference in time concentration period.
作者
王汉卿
王启优
刘红兵
王玉平
WANG Han-qing;WANG Qi-you;LIU Hong-bing;WANG Yu-ping(Bureau of Lintao Hydrology and Water Resources Survey,Lintao,Gansu 730500,China;Gansu Provincial Bureau of Hydrology and Water Resources,Lanzhou 730000)
出处
《地下水》
2020年第5期190-193,共4页
Ground water
关键词
四季分配
夏季降水
年际变化
年内变化
极端天气
甘肃省
Summer precipitation
interannual changes
annual changes
extreme weather
Gansu Provincial
