摘要
利用华北地区26 个站的1951 ~1997 年月降水量( P) 和月平均气温( T) 资料,用高桥浩一郎的蒸发计算公式计算了地面蒸发量( E) ,并通过Morlet 小波变换法分析了华北地区的水资源各分量( P,E 及可利用降水P- E) 的时间频率的多层次结构和突变特征。
The characteristics of multiple time scales and the feature of abrupt change for the every component of the water resources (precipitation P , evaporation E and utilizable precipitation P-E ) have been analyzed by means of the Morlet wavelet transformation method. The data sets for study are the monthly precipitation ( P ) and temperature ( T ) from 1951 to 1997 at 26 stations over North China. The evaporation (E) is calculated by Koichiro's evaporation equation.
出处
《高原气象》
CSCD
北大核心
1999年第4期496-508,共13页
Plateau Meteorology
基金
中国科学院"九.五"重大应用基础研究项目