气象学报2016，Vol.74Issue(1)：18-30,13.
中国大陆日降水峰值时间位相的区域特征分析
Regional characteristics of diurnal peak phases of precipitation over contiguous China
摘要
Abstract
Diurnal variations in amount,frequency,and intensity of warm season precipitation were studied and compared using the hourly rain-gauge data from the high-resolution national surface stations of China.It was found that there are three kind phases for the diurnal peak of precipitation:afternoon,early morning,and night.Overall,the frequency tends to peak in the early morning,while the intensity reaches the maximum in the afternoon.Taking the peak phases of both amount and frequen-cy into account simultaneously,seven key regions were divided:two afternoon-peak regions (AN N,AN S),two night-peak regions (MN N,MN S),two early-morning-peak regions (EM N,EM S),and a region over the Tibetan Plateau (EVE TP, with evening peaks).Precipitation amount and frequency at most stations within these key regions present coherent peak pha-ses.In contrast,stations located out of the key regions tend to have opposite peak phases:the afternoon peak of precipitation amount versus the early morning peak of precipitation frequency.An important feature of the overall phase pattern is that the phase of the amount lags (leads)that of the intensity (frequency)in regions with afternoon,evening,or night peaks,which in-dicates the asymmetry of precipitation processes and the evolvement of convective clouds.关键词
中国大陆/降水/日变化Key words
Contiguous China/Precipitation/Diurnal variation分类
天文与地球科学引用本文复制引用
宇如聪,李建..中国大陆日降水峰值时间位相的区域特征分析[J].气象学报,2016,74(1):18-30,13.基金项目
资助课题北京市优秀博士学位论文指导教师科技项目（20138005801）、国家自然科学基金项目（41322034）。 （）
