气候变化领域集成服务门户(CCPortal): Effect of spring soil moisture over the Indo-China Peninsula on the following summer extreme precipitation events over the Yangtze River basin

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DOI	10.1007/s00382-020-05187-5
	Effect of spring soil moisture over the Indo-China Peninsula on the following summer extreme precipitation events over the Yangtze River basin
	Gao C.; Li G.; Xu B.; Li X.
发表日期	2020
ISSN	0930-7575
起始页码	3845
结束页码	3861
卷号	54
英文摘要	Extreme precipitation events (EPEs) over the Yangtze River basin (YRB) exert widespread impacts on regional ecological environment and people’s life. Using observed precipitation, atmospheric reanalysis, and land assimilation datasets, the present study explores the relationship between the summer EPEs over the YRB and the Meiyu front and their possible linkages with the preceding spring soil moisture anomalies over the Indo-China Peninsula (ICP). The analyses show that both the frequency and intensity of summer EPEs over the YRB are closely associated with the mean intensity of the Meiyu front, which exhibits a significant negative correlation with the soil moisture anomalies in the preceding spring over the ICP. An abnormally drier soil over the ICP in spring would evidently raise air temperature by suppressing local evapotranspiration, and vice versa. Owing to a strong memory of the ICP soil moisture, the persistent anomalous heating would elevate local geopotential height in summer, inducing an excessive westward extension of the Western Pacific subtropical high. Accordingly, a strengthened southwesterly wind at the lower troposphere brings abundant warm–wet air to the YRB, intensifying the mean Meiyu front. This is also verified by the diagnosis of vertical motion (omega) equation. As a result, the risk of summer EPEs (both the frequency and intensity) over the YRB would increase (decrease) with an abnormally drier (wetter) ICP soil during the preceding spring. For the summer EPEs over the YRB, our results suggest that the spring ICP soil moisture can be used as an important seasonal predictor. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	East Asian summer monsoon; Extreme precipitation events; Indo-China Peninsula; Meiyu front; Soil moisture; Yangtze River basin
语种	英语
scopus关键词	data set; extreme event; precipitation assessment; regional climate; seasonal variation; soil moisture; China; Indochina; Yangtze Basin
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145500
作者单位	College of Oceanography, Hohai University, Nanjing, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China; Key Laboratory of Coastal Disaster and Defence (Hohai University), Ministry of Education, Nanjing, China; Zhejiang Early Warning Center, Zhejiang Meteorological Bureau, Hangzhou, China; Key Laboratory of Meteorological Disaster, Ministry of Education/International Joint Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China
推荐引用方式 GB/T 7714	Gao C.,Li G.,Xu B.,et al. Effect of spring soil moisture over the Indo-China Peninsula on the following summer extreme precipitation events over the Yangtze River basin[J],2020,54.
APA	Gao C.,Li G.,Xu B.,&Li X..(2020).Effect of spring soil moisture over the Indo-China Peninsula on the following summer extreme precipitation events over the Yangtze River basin.Climate Dynamics,54.
MLA	Gao C.,et al."Effect of spring soil moisture over the Indo-China Peninsula on the following summer extreme precipitation events over the Yangtze River basin".Climate Dynamics 54(2020).