干旱区生态环境知识资源中心(Arid): Near-Surface Warming Reduces Dew Frequency in China

Arid

DOI	10.1029/2020GL091923
	Near-Surface Warming Reduces Dew Frequency in China
	Dou, Youjun; Quan, Jiannong; Jia, Xingcan; Wang, Qianqian; Liu, Yangang
通讯作者	Quan, JN (corresponding author), Chinese Meteorol Adm, Inst Urban Meteorol, Beijing, Peoples R China. ; Quan, JN ; Liu, YG (corresponding author), Brookhaven Natl Lab, Environm & Climate Sci Dept, Upton, NY 11973 USA.
来源期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2021
卷号	48 期号:7
英文摘要	Long-term (1961-2010) observations of dew data collected at 597 stations over China show that dew frequency decreased by 5.2 days per decade due primarily to near-surface warming and associated decreases in relative humidity (RH). Moreover, the percentage decreasing rate of dew frequency in arid regions (precipitation PR <400 mm yr(-1)) are larger than that in humid regions (PR >= 800 mm yr(-1)). Compared with the 1960s, the mean dew frequency in the 2000s decreased by 28%, 40%, 50% in humid, semihumid (400 <= PR < 800 mm yr(-1)), and arid regions, respectively. Surface warming is larger in arid regions in northwestern China than its humid and semihumid regions during recent global warming, which leads to larger decreases in surface RH and makes dew events less likely. Since dew contributes significantly to surface water balance in arid regions, the large decreases in dew frequency may contribute to the drier getting drier response to global warming over arid regions. Plain Language Summary Here we show, by analyzing 50 years (1961-2010) of data collected at 597 stations in China, that dew occurrence in China exhibits a clear decreasing trend, and the decreasing rate of dew frequency in arid regions is higher than that in semihumid and humid regions. Compared with the 1960s, the mean dew frequency in the 2000s decreased by 28%, 40%, 50% in the humid, semihumid, and arid regions of China, respectively. Further analysis reveals that the decreased dew frequency is caused primarily by near- surface warming and drying. Large decreases in surface relative humidity in arid regions associated with large warming makes dew events less likely. This could make the region drier as dew is a significant water source in arid regions.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000641974600019
WOS关键词	DESERT AMPLIFICATION ; DROUGHT ; DRYLANDS ; CLIMATE ; TRENDS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350423
作者单位	[Dou, Youjun; Quan, Jiannong; Jia, Xingcan; Wang, Qianqian] Chinese Meteorol Adm, Inst Urban Meteorol, Beijing, Peoples R China; [Quan, Jiannong; Liu, Yangang] Brookhaven Natl Lab, Environm & Climate Sci Dept, Upton, NY 11973 USA
推荐引用方式 GB/T 7714	Dou, Youjun,Quan, Jiannong,Jia, Xingcan,et al. Near-Surface Warming Reduces Dew Frequency in China[J],2021,48(7).
APA	Dou, Youjun,Quan, Jiannong,Jia, Xingcan,Wang, Qianqian,&Liu, Yangang.(2021).Near-Surface Warming Reduces Dew Frequency in China.GEOPHYSICAL RESEARCH LETTERS,48(7).
MLA	Dou, Youjun,et al."Near-Surface Warming Reduces Dew Frequency in China".GEOPHYSICAL RESEARCH LETTERS 48.7(2021).