气候变化领域集成服务门户(CCPortal): Weakening influence of spring soil moisture over the indo-china peninsula on the following summer mei-yu front and precipitation extremes over the yangtze river basin

CCPortal

DOI	10.1175/JCLI-D-20-0117.1
	Weakening influence of spring soil moisture over the indo-china peninsula on the following summer mei-yu front and precipitation extremes over the yangtze river basin
	GAO C.; LI G.; XU B.
发表日期	2020
ISSN	0894-8755
起始页码	10055
结束页码	10072
卷号	33 期号:23
英文摘要	The seasonal prediction of precipitation extremes over the Yangtze River basin (YRB) has always been a great challenge. This study investigated the effects of spring soil moisture over the Indo-China Peninsula (ICP) on the following summer mei-yu front and YRB precipitation extremes during 1961-2010. The results indicated that the frequency of summer YRB precipitation extremes was closely associated with the mei-yu front intensity, which exhibited a strong negative correlation with the preceding spring ICP soil moisture. However, the lingering climate influence of the ICP soil moisture was unstable, with an obvious weakening since the early 1990s. Due to its strong memory, an abnormally lower spring soil moisture over the ICP would increase local temperature until the summer by inducing less evapotranspiration. Before the early 1990s, the geopotential height elevation associated with the ICP heating affected the western Pacific subtropical high (WPSH), strengthening the southwesterly summer monsoon. Consequently, the mei-yu front was intensified as more warm, wet air was transported to the YRB, and local precipitation extremes also occurred more frequently associated with abnormal ascending motion mainly maintained by the warm temperature advection. In the early 1990s, the Asian summer monsoon underwent an abrupt shift, with the changing climatological states of the large-scale circulations. Therefore, the similar ICP heating induced by the anomalous soil moisture had different effects on the monsoonal circulation, resulting in weakened responses of the mei-yu front and YRB precipitation extremes since the early 1990s. © 2020 American Meteorological Society.
英文关键词	Atmospheric thermodynamics; Watersheds; Asian summer monsoons; Geo-potential heights; Large-scale circulation; Negative correlation; Precipitation extremes; Seasonal prediction; Warm temperatures; Yangtze River basin; Soil moisture; atmospheric circulation; atmospheric front; decadal variation; evapotranspiration; extreme event; land-atmosphere interaction; monsoon; precipitation (climatology); river basin; soil moisture; spring (hydrology); summer; China; Indochina; Yangtze Basin
语种	英语
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/170996
作者单位	College of Oceanography, Key Laboratory of Marine Hazards Forecasting, Ministry of Natural Resources, Key Laboratory of Ministry of Education for Coastal Disaster and Protection, Hohai University, Nanjing, China; Key Laboratory of Meteorological Disaster, Ministry of Education, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China; College of Intelligent Science and Control Engineering, Jingling Institute of Technology, Nanjing, China
推荐引用方式 GB/T 7714	GAO C.,LI G.,XU B.. Weakening influence of spring soil moisture over the indo-china peninsula on the following summer mei-yu front and precipitation extremes over the yangtze river basin[J],2020,33(23).
APA	GAO C.,LI G.,&XU B..(2020).Weakening influence of spring soil moisture over the indo-china peninsula on the following summer mei-yu front and precipitation extremes over the yangtze river basin.Journal of Climate,33(23).
MLA	GAO C.,et al."Weakening influence of spring soil moisture over the indo-china peninsula on the following summer mei-yu front and precipitation extremes over the yangtze river basin".Journal of Climate 33.23(2020).