气候变化领域集成服务门户(CCPortal): Precipitable water and CAPE dependence of rainfall intensities in China

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DOI	10.1007/s00382-018-4327-8
	Precipitable water and CAPE dependence of rainfall intensities in China
	Dong W.; Lin Y.; Wright J.S.; Xie Y.; Yin X.; Guo J.
发表日期	2019
ISSN	0930-7575
起始页码	3357
结束页码	3368
卷号	52 期号:2020-05-06
英文摘要	The influence of temperature on precipitation in China is investigated from two aspects of the atmospheric water cycle: available water vapor and atmospheric instability. Daily observations are used to analyze how rainfall intensities and its spatial distribution in mainland China depend on these two aspects. The results show that rainfall intensities, and especially rainfall extremes, increase exponentially with available water vapor. The efficiency of water vapor conversion to rainfall is higher in northwestern China where water vapor is scarce than in southeastern China where water vapor is plentiful. The results also reveal a power law relationship between rainfall intensity and convective instability. The fraction of convective available potential energy (CAPE) converted to upward velocity is much larger over southeastern China than over the arid northwest. The sensitivities of precipitation to temperature-induced changes in available water vapor and atmospheric convection are thus geographically reciprocal. Specifically, while conversion of water vapor to rainfall is relatively less efficient in southeastern China, conversion of CAPE to upward kinetic energy is more efficient. By contrast, in northwestern China, water vapor is efficiently converted to rainfall but only a small fraction of CAPE is converted to upward motion. The detailed features of these relationships vary by location and season; however, the influences of atmospheric temperature on rainfall intensities and rainfall extremes are predominantly expressed through changes in available water vapor, with changes in convective instability playing a secondary role. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Available water vapor; China; Convective instability; Rainfall intensity
语种	英语
scopus关键词	air temperature; convective system; potential energy; precipitation (climatology); precipitation intensity; rainfall; spatial distribution; temperature effect; water vapor; China
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/146466
作者单位	Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, and Joint Center for Global Change Studies (JCGCS), Tsinghua University, Beijing, 100084, China; ERT, Inc., at NOAA National Climatic Data Center, Asheville, NC 28801, United States; State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of China Meteorological Administration (CMA), Chinese Academy of Meteorological Sciences, Beijing, 100081, China
推荐引用方式 GB/T 7714	Dong W.,Lin Y.,Wright J.S.,et al. Precipitable water and CAPE dependence of rainfall intensities in China[J],2019,52(2020-05-06).
APA	Dong W.,Lin Y.,Wright J.S.,Xie Y.,Yin X.,&Guo J..(2019).Precipitable water and CAPE dependence of rainfall intensities in China.Climate Dynamics,52(2020-05-06).
MLA	Dong W.,et al."Precipitable water and CAPE dependence of rainfall intensities in China".Climate Dynamics 52.2020-05-06(2019).