气候变化领域集成服务门户(CCPortal): Possible causes of the significant decrease in the number of summer days with light rain in the east of southwestern China

CCPortal

DOI	10.1016/j.atmosres.2019.104804
	Possible causes of the significant decrease in the number of summer days with light rain in the east of southwestern China
	Zhou J.; Zhi R.; Li Y.; Zhao J.; Xiang B.; Wu Y.; Feng G.
发表日期	2020
ISSN	0169-8095
卷号	236
英文摘要	In this paper, we investigated the spatio-temporal characteristics of the amount of light rain and the number of days with light rain in the ESWC and explored the possible causes of the significant decrease in the number of days with light rain. The results show that: (1) Both the amount of light rain and the number of days with light rain over the ESWC in summer showed a decreasing trend, with linear trends of −1.5 mm/decade and −0.88 day/decade, respectively. The decrease in the number of days with light rain was more distinct than the decrease in the amount of light rain. (2) The decrease in the number of days with light rain was closely related to the decrease in the relative humidity caused by an increase in temperature and specific humidity. The trend in relative humidity resulting from an increase in temperature alone was −1.1%/decade, whereas the trend in relative humidity caused by an increase in specific humidity alone was 0.29%/decade. The trend in relative humidity was −0.76%/decade. The decrease in relative humidity was mainly a result of an increase in temperature. (3) The increase in temperature resulted in a decrease in the relative humidity and an increase in the surface evaporation. The increase in evaporation increased the specific humidity, which, in turn, increased the relative humidity. This compensated for the decrease in the relative humidity caused by the increase in the temperature and further decelerated the decrease in the number of days with light rain. © 2019 Elsevier B.V.
英文关键词	East of southwestern China; Light rain days; Relative humidity; Specific humidity; Warming in the lower troposphere
学科领域	Atmospheric humidity; Evaporation; East of southwestern China; Linear trends; Lower troposphere; Rain days; Spatiotemporal characteristics; Specific humidity; Surface evaporation; Rain; air temperature; decadal variation; humidity; rainfall; spatiotemporal analysis; summer; trend analysis; troposphere; China
语种	英语
scopus关键词	Atmospheric humidity; Evaporation; East of southwestern China; Linear trends; Lower troposphere; Rain days; Spatiotemporal characteristics; Specific humidity; Surface evaporation; Rain; air temperature; decadal variation; humidity; rainfall; spatiotemporal analysis; summer; trend analysis; troposphere; China
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120481
作者单位	Chongqing Climate Center, Chongqing Meteorological Bureau, Chongqing, 401147, China; Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing, 100081, China; College of Physical Science and Technology, Yangzhou University, Yangzhou, 225002, China
推荐引用方式 GB/T 7714	Zhou J.,Zhi R.,Li Y.,et al. Possible causes of the significant decrease in the number of summer days with light rain in the east of southwestern China[J],2020,236.
APA	Zhou J..,Zhi R..,Li Y..,Zhao J..,Xiang B..,...&Feng G..(2020).Possible causes of the significant decrease in the number of summer days with light rain in the east of southwestern China.Atmospheric Research,236.
MLA	Zhou J.,et al."Possible causes of the significant decrease in the number of summer days with light rain in the east of southwestern China".Atmospheric Research 236(2020).