气候变化领域集成服务门户(CCPortal): Contrasting cloud regimes and associated rainfall over the South Asian and East Asian monsoon regions

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DOI	10.1175/JCLI-D-20-0992.1
	Contrasting cloud regimes and associated rainfall over the South Asian and East Asian monsoon regions
	Wu R.; Chen G.
发表日期	2021
ISSN	08948755
起始页码	3663
结束页码	3681
卷号	34 期号:9
英文摘要	The Asian monsoon has large spatial and temporal variabilities in winds and precipitation. This study reveals that the Asian monsoon also exhibits pronounced regional differences in cloud regimes and cloud-rainfall relationship at a wide range of time scales from diurnal to seasonal to interannual. Over South (East) Asia, the convectively active regime of deep convection (CD) occurs frequently in June-September (March-September) with a late-afternoon peak (morning feature). The intermediate mixture (IM) regime over South Asia mainly occurs in summer and maximizes near noon. It develops as CD at late afternoon and dissipates as convective cirrus (CC) after midnight, showing a life cycle of thermal convection in response to solar radiation. Over East Asia, IM is dominant in cold seasons with a small diurnal cycle, indicating a prevalence of midlevel stratiform clouds. Further analyses show that CD and CC contribute 80%-90% of the rainfall amount and most of the intense rainfall in the two key regions. The CD-related rainfall also accounts for the pronounced diurnal cycles of summer rainfall with a late-afternoon peak (morning feature) over northern India (Southeast China). The afternoon CD-related rainfall mainly results from thermal convection under the moderate humidity but warm conditions particularly over northern India, while the morning CD-related rainfall over Southeast China is more related to the processes with high humidity. The CD/CC-related rainfall also exhibits large interannual variations that explain;90% of the interannual variance of summer rainfall. The interannual variations of CD/CC occurrence are positively correlated with the moist southerlies and induced convergence, especially over Southeast China, suggesting a close relationship between cloud regimes and monsoon activities. © 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Clouds; Diurnal effects; Interannual variability; Monsoons; Precipitation; Seasonal cycle
语种	英语
scopus关键词	Artificial life; Atmospheric thermodynamics; Heat convection; East Asian monsoon; Intense rainfalls; Interannual variation; Regional differences; Spatial and temporal variability; Stratiform clouds; Summer rainfall; Thermal convections; Rain
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178607
作者单位	School of Atmospheric Sciences, Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
推荐引用方式 GB/T 7714	Wu R.,Chen G.. Contrasting cloud regimes and associated rainfall over the South Asian and East Asian monsoon regions[J],2021,34(9).
APA	Wu R.,&Chen G..(2021).Contrasting cloud regimes and associated rainfall over the South Asian and East Asian monsoon regions.Journal of Climate,34(9).
MLA	Wu R.,et al."Contrasting cloud regimes and associated rainfall over the South Asian and East Asian monsoon regions".Journal of Climate 34.9(2021).