摘要
根据西北地区８３个台站１９６１～１９９０年月降水量资料，对降水距平百分率、降水标准化变量和Ｚ指数进行了对比分析，并对Ｚ指数的旱涝等级标准进行了重新确定，认为经修正后的Ｚ指数更适合于西北地区单站各旱涝时段的划分。在此基础上，确定了一个区域的旱涝指标，进而计算了西北地区及其６个分区的旱涝指数，并进行了旱涝年份划分。
By use of the monthly precipitation data of 83 sampling meteorological stations in the Northwest China from 1961 to 1990,the anomalous percentage of precipitation, the standard variable of precipitation and the Z-index were tested and compared with each other. Grades of flood/drought for Z-index were again determined, the modified Z-index was recognized to be optimum for differentiating station flood or drought in the Northwest China. On this basis, flood and drought differentiating indices were given for the Northwest China.
出处
《高原气象》
CSCD
北大核心
1998年第4期381-389,共9页
Plateau Meteorology
基金
国家科技部重中之重项目
