武汉地区降雨特性的年际变化

武汉地区降雨特性的年际变化 YEAR-TO-YEAR RAINFALL CHARACTERISTIC VARIATIONS AT WUHAN 黄润生 Huang Runsheng first-author 张继征 Zhang Jizheng 廖梁 Liao Liang 聂朝霞 Nie Zhaoxia 本文根据武汉地区1976年—1985年10年5分钟雨强数据,统计出武汉地区的降雨特征,为预报毫米波雨衰减模式作准备。在假定有雨时间内,雨强的年际变化为对数正态随机过程的条件下,给出雨强均值和方差的逐年变化及协方差矩阵。从而得到在有雨时间内,多年雨强联合概率密度。由此揭示了年与年之间雨强所处状态之间的内在联系。 In this paper 10 years’（1976—1985）rainfall data observed every 5 minut-es at Wuhan have been analysised for the prediction of millimeter wave rain attenuation. The year-to-year mean and variance variations and the covariance matrix of rainfall rate have been given under the assumption of log-normal random process during rain The joint-probability density of rainfall rates is obtained,which may be an indication of the internal relation of rainfall rates from year to year. 武汉 毫米波衰减 雨强 协方差 n维对数正态分布 Wuhan rain attenuation of millimeter wave rainfall rate covariance n-dimension log-normal distribution. 1988-03-01 2021-04-01 3