干旱区生态环境知识资源中心(Arid): An hourly-scale assessment of sub-cloud evaporation effect on precipitation isotopes in a rainshadow oasis of northwest China

Arid

DOI	10.1016/j.atmosres.2022.106202
	An hourly-scale assessment of sub-cloud evaporation effect on precipitation isotopes in a rainshadow oasis of northwest China
	Wang, Liwei; Wang, Shengjie; Zhang, Mingjun; Duan, Lihong; Xia, Yijie
通讯作者	Wang, SJ
来源期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
EISSN	1873-2895
出版年	2022
卷号	274
英文摘要	In arid northwest China where the precipitation intensity is relatively low, the stable hydrogen and oxygen isotopes (62H and 618O) in precipitation are usually impacted by the sub-cloud evaporation. To understand the sub-cloud evaporation effect under an arid climate, we used the hourly meteorological data at 14 stations in the Kaxgar-Yarkant River Oasis, a rainshadow oasis of northwest China, and estimated the monthly and hourly isotopic change in falling drops from the cloud base to the ground. The results showed that the hourly meteorological observations are an effective way to assess the spatiotemporal pattern of sub-cloud evaporation effect. Across the 14 stations, the annual mean changes in deuterium excess below cloud base ranged from -19.1%o to -6.8%o. The impacts of sub-cloud evaporation during spring and autumn are larger than those during winter and weaker than those during summer. The exponential regression (R2 = 0.96), instead of linear regression (R2 = 0.85), is better at describing the relationship between the raindrop remaining fraction and the isotopic changes from the cloud base to the ground. The sensitivity analysis of isotopic changes to different relative humidity scenarios shows that the drying scenario may lead to slightly larger sensitivity than the wetting scenario. The impact of sub-cloud evaporation on stable isotope compositions in precipitation may be underestimated when low precipitation events (especially less than 1 mm/h) are not sampled.
英文关键词	Precipitation Stable isotope Sub-cloud evaporation Arid central Asia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000797430100002
WOS关键词	ARID CENTRAL-ASIA ; DEUTERIUM EXCESS ; WATER ; FRACTIONATION ; OXYGEN
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391954
推荐引用方式 GB/T 7714	Wang, Liwei,Wang, Shengjie,Zhang, Mingjun,et al. An hourly-scale assessment of sub-cloud evaporation effect on precipitation isotopes in a rainshadow oasis of northwest China[J],2022,274.
APA	Wang, Liwei,Wang, Shengjie,Zhang, Mingjun,Duan, Lihong,&Xia, Yijie.(2022).An hourly-scale assessment of sub-cloud evaporation effect on precipitation isotopes in a rainshadow oasis of northwest China.ATMOSPHERIC RESEARCH,274.
MLA	Wang, Liwei,et al."An hourly-scale assessment of sub-cloud evaporation effect on precipitation isotopes in a rainshadow oasis of northwest China".ATMOSPHERIC RESEARCH 274(2022).