气候变化领域集成服务门户(CCPortal): Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season

CCPortal

DOI	10.1016/j.atmosres.2019.104693
	Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season
	Wu N.; Ding X.; Wen Z.; Chen G.; Meng Z.; Lin L.; Min J.
发表日期	2020
ISSN	0169-8095
卷号	235
英文摘要	Heavy rainfalls occur frequently during early summer (April–June) over South China, causing severe floods. Using 12 years of hourly rain-gauge data, we identify a large number of regional heavy rainfall events and categorize them into two major types based on the strength of synoptic forcing. It is shown that frontal heavy rainfalls associated with fronts or shear lines mainly occurs over inland regions, whereas warm-sector heavy rainfall under weakly forced synoptic environment is observed in coastal areas. The rainfall maxima of both types tend to form over the low-lying plains or sea surfaces adjacent to windward mountains. Frontal heavy rainfall usually propagates southwards with a cold front, while warm-sector events move relatively slowly and produce coherent patterns of rainfall. The occurrence of warm-sector rainfall increases markedly from April to June in a close association with the onset of summer monsoon, in contrast to frontal rainfall with less monthly variation. Warm-sector rainfall also exhibits pronounced diurnal variation, with a peak in the early morning, as a result of intensified convergence between nocturnal low-level jets in southerly monsoon and land breezes. In contrast, frontal rainfall has an afternoon peak, due to the arrival of eastward-propagating rain systems and daytime heating on land. As frontal (warm-sector) heavy rainfall has relatively high (low) predictability in numerical models, understanding their occurrence and formation is of benefit to operational forecasting and decision-making for disaster prevention. © 2019
英文关键词	Diurnal variation; Early-summer rainy season; Frontal heavy rainfall; Land-sea breeze; Monsoon; Warm-sector heavy rainfall
学科领域	Atmospheric movements; Atmospheric thermodynamics; Decision making; Disaster prevention; Rain gages; Diurnal variation; Heavy rainfall; Land-sea breeze; Monsoon; Rainy seasons; Rain; diurnal variation; land breeze; monsoon; rainfall; sea breeze; seasonal variation; summer; China
语种	英语
scopus关键词	Atmospheric movements; Atmospheric thermodynamics; Decision making; Disaster prevention; Rain gages; Diurnal variation; Heavy rainfall; Land-sea breeze; Monsoon; Rainy seasons; Rain; diurnal variation; land breeze; monsoon; rainfall; sea breeze; seasonal variation; summer; China
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120513
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing, 210044, China; Key Laboratory of Regional Numerical Weather Prediction, Institute of Tropical and Marine Meteorology, Chinese Meteorological Administration, Guangzhou, 510080, China; School of Atmospheric Sciences, Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China; Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai, 200433, China; Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China; Guangdong Provincial Meteorological Observatory, Guangzhou, 510080, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
推荐引用方式 GB/T 7714	Wu N.,Ding X.,Wen Z.,et al. Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season[J],2020,235.
APA	Wu N..,Ding X..,Wen Z..,Chen G..,Meng Z..,...&Min J..(2020).Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season.Atmospheric Research,235.
MLA	Wu N.,et al."Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season".Atmospheric Research 235(2020).