The seasonal and diurnal variations of cloud systems are profoundly affected by the large-scale and local environments. In this study, a one-year-long simulation was conducted using a two-dimensional cloud-resolving model over the Eastern Tibetan Plateau (ETP) and two subregions of Eastern China: Southern East China and Central East China. Deep convective clouds (DCCs) rarely occur in the cold season over ETP, whereas DCCs appear in Eastern China throughout the year, and the ETP DCCs are approximately 20％?30％ shallower than those over Eastern China. Most strong rainfall events (precipitation intensity, PI> 2.5 mm h?1) in Eastern China are related to warm-season DCCs with ice cloud processes. Because of the high elevation of the ETP, the warm-season freezing level is lower than in Eastern China, providing favorable conditions for ice cloud processes. DCCs are responsible for the diurnal variations of warm-season rainfall in all three regions. Warm-season DCCs over the ETP have the greatest total cloud water content and frequency in the afternoon, resulting in an afternoon rainfall peak. In addition, rainfall events in the ETP also exhibit a nocturnal peak in spring, summer, and autumn due to DCCs. Strong surface heat fluxes around noon can trigger or promote DCCs in spring, summer, and autumn over the ETP but produce only cumulus clouds in winter due to the cold and dry environment.

Jinghua CHEN;Xiaoqing WU;Chunsong LU;Yan YIN

Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing 210044,China;Key Laboratory of Meteorology and Ecological Environment of Hebei Province,Shijiazhuang 050022,China;Department of Geological and Atmospheric Sciences,Iowa State University,Ames,Iowa 50011,USA

大气科学进展（英文版）

[1]Jinghua CHEN;Xiaoqing WU;Chunsong LU;Yan YIN-.Seasonal and Diurnal Variations of Cloud Systems over the Eastern Tibetan Plateau and East China: A Cloud-resolving Model Study※)[J].大气科学进展（英文版）,2022(07):1034-1049

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