Intra-Annual Variability of Diurnal Cycle Precipitation over China from 1960–2000

Abstract

AbstractCharacteristics of diurnal cycle precipitation over China are investigated using twice-daily observations by the China Meteorological Administration during 1960–2000. Characteristics investigated include night-time/daytime precipitation amount (PA), intensity, and frequency. Geographically, the region is separated into western and eastern China by the 110°E longitude. Our analysis shows that there generally is more night-time than daytime precipitation in western China, particularly in the Sichuan Basin. Over eastern China, the opposite holds true, particularly along the southeast coast. Regional average monthly daytime and night-time precipitation peaks in the same month for both western and eastern China. Over western China, monthly night-time precipitation is always greater than that during daytime, but the night-time precipitation frequency (PF) is only greater in non-summer (June–August) months. Over eastern China, daytime precipitation is greater than that in the night-time during the warm s...