摘要
利用汤阴县1964-2008年45a降水资料，探讨汛期降水量和年降水量的变化趋势，并计算出各个时段的概率分布模型。结果表明：汤阴县年平均降水量呈增长趋势，约呈22a的周期振荡，上世纪70年代以来汛期降水量与年降水量波动显著；汛期降水量和年降水量均服从正态分布。
Utilizing the precipitation data of Tangyin during the 45 years （from 1964 to 2008） , we discussed the change trends of precipitation in flood season and annual precipitation, and then calculated the probability distribution model for each period. The results show that the annual mean precipitation in- creased and appeared 22 years of periodic oscillations in Tangyin. Even since 1970s, there were significant fluctuations in flood season and annual precipitation. Base on the whole data, the flood season and annual precipitation followed a normal distribution.
出处
《气象与环境科学》
2010年第B09期163-165,共3页
Meteorological and Environmental Sciences
关键词
降水量
变化趋势
正态分布
概率模型
precipitation
change trend
normal distribution
probability model
