GSTDTAP  > 地球科学
DOI10.1016/j.atmosres.2019.104693
Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season
Wu, Naigeng1,2; Ding, Xi3,8; Wen, Zhiping3,4,5; Chen, Guixing3,8; Meng, Zhiyong6; Lin, Liangxun7; Min, Jinzhong1
2020-05-01
发表期刊ATMOSPHERIC RESEARCH
ISSN0169-8095
EISSN1873-2895
出版年2020
卷号235
文章类型Article
语种英语
国家Peoples R China
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.


英文关键词Warm-sector heavy rainfall Frontal heavy rainfall Monsoon Land-sea breeze Diurnal variation Early-summer rainy season
领域地球科学
收录类别SCI-E
WOS记录号WOS:000525322800010
WOS关键词EXTREME HOURLY PRECIPITATION ; MESOSCALE CONVECTIVE SYSTEMS ; DIURNAL-VARIATIONS ; WRF SENSITIVITY ; EVENT ; SIMULATION ; FLOOD ; CYCLE ; PART ; PREDICTABILITY
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/278850
专题地球科学
作者单位1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Peoples R China;
2.Chinese Meteorol Adm, Key Lab Reg Numer Weather Predict, Inst Trop & Marine Meteorol, Guangzhou 510080, Peoples R China;
3.Sun Yat Sen Univ, Sch Atmospher Sci, Guangdong Prov Key Lab Climate Change & Nat Disas, Guangzhou, Peoples R China;
4.Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai 200433, Peoples R China;
5.Fudan Univ, Inst Atmospher Sci, Shanghai 200433, Peoples R China;
6.Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Lab Climate & Ocean Atmosphere Studies, Beijing 100871, Peoples R China;
7.Guangdong Prov Meteorol Observ, Guangzhou 510080, Peoples R China;
8.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China
推荐引用方式
GB/T 7714
Wu, Naigeng,Ding, Xi,Wen, Zhiping,et al. Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season[J]. ATMOSPHERIC RESEARCH,2020,235.
APA Wu, Naigeng.,Ding, Xi.,Wen, Zhiping.,Chen, Guixing.,Meng, Zhiyong.,...&Min, Jinzhong.(2020).Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season.ATMOSPHERIC RESEARCH,235.
MLA Wu, Naigeng,et al."Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season".ATMOSPHERIC RESEARCH 235(2020).
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