干旱区生态环境知识资源中心(Arid): Observed changes in vapor pressure deficit suggest a systematic drying of the atmosphere in Xinjiang of China

Arid

DOI	10.1016/j.atmosres.2020.105199
	Observed changes in vapor pressure deficit suggest a systematic drying of the atmosphere in Xinjiang of China
	Li, Moyan; Yao, Junqiang; Guan, Jingyun; Zheng, Jianghua
通讯作者	Zheng, JH
来源期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
EISSN	1873-2895
出版年	2021
卷号	248
英文摘要	The vapor pressure deficit (VPD) is the difference between the atmospheric water vapor holding capacity at saturation (e(s)) and actual amount of water vapor (e(a)) in the air at a given temperature. In this study, we investigated the changes in VPD and related variables (air temperature, relative humidity, e(s) and e(a)), and assessed the relationship between VPD and atmospheric conditions in Xinjiang over the period 1961-2017. The annual VPD records showed increasing trends during all seasons. In terms of spatial distribution, the increasing and decreasing trends of annual VPD were 79% (57% significant) and 21% (9% significant) of the observation stations, respectively. A trend reversal from downward to upward was observed in 1993, and the VPD records indicated rapid drying of the atmosphere in Xinjiang for 1994-2017, especially in the summer months. The differences in e(s) and e(a) resulted in changes in the VPD, and the e(a) generally increased less than the e(s). We suggest that the increasing VPD in Xinjiang is due to increasing e(s) from rising temperatures and decreasing e(a) from decreasing relative humidity since 1994. The decreased relative humidity has a strong influence on the increased VPD and accounts for similar to 74% of the variance in Xinjiang. In different environments, the VPD trends followed changes in air temperature and e(a), with the greatest VPD increase in the desert, followed by the oasis and mountain environments. The increased VPD observed in Xinjiang between 1994 and 2017 is consistent with the global intensification of drought and adverse ecological effects of the 21st century. Thus, VPD change can be an accurate measure of regional drought and vegetation dynamics in Xinjiang.
英文关键词	Vapor pressure deficit (VPD) Relative humidity Air temperature Xinjiang
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000594095900002
WOS关键词	ARID REGION ; CLIMATE-CHANGE ; CENTRAL-ASIA ; TEMPERATURE ; NORTHWEST ; HUMIDITY ; TRENDS ; TRANSPIRATION ; PRECIPITATION ; SATELLITE
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328045
作者单位	[Li, Moyan; Guan, Jingyun; Zheng, Jianghua] Xinjiang Univ, Coll Resources & Environm Sci, Inst Arid Ecol & Environm, Key Lab Oasis Ecol,Minist Educ, Urumqi 830046, Peoples R China; [Yao, Junqiang] China Meteorol Adm, Inst Desert Meteorol, Urumqi 830002, Peoples R China; [Guan, Jingyun] Xinjiang Univ Finance & Econ, Coll Tourism, Urumqi 830012, Peoples R China
推荐引用方式 GB/T 7714	Li, Moyan,Yao, Junqiang,Guan, Jingyun,et al. Observed changes in vapor pressure deficit suggest a systematic drying of the atmosphere in Xinjiang of China[J]. 新疆大学,2021,248.
APA	Li, Moyan,Yao, Junqiang,Guan, Jingyun,&Zheng, Jianghua.(2021).Observed changes in vapor pressure deficit suggest a systematic drying of the atmosphere in Xinjiang of China.ATMOSPHERIC RESEARCH,248.
MLA	Li, Moyan,et al."Observed changes in vapor pressure deficit suggest a systematic drying of the atmosphere in Xinjiang of China".ATMOSPHERIC RESEARCH 248(2021).