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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 M.; Yao J.; Guan J.; Zheng J.
发表日期	2021
ISSN	0169-8095
卷号	248
英文摘要	The vapor pressure deficit (VPD) is the difference between the atmospheric water vapor holding capacity at saturation (es) and actual amount of water vapor (ea) in the air at a given temperature. In this study, we investigated the changes in VPD and related variables (air temperature, relative humidity, es and ea), 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 es and ea resulted in changes in the VPD, and the ea generally increased less than the es. We suggest that the increasing VPD in Xinjiang is due to increasing es from rising temperatures and decreasing ea from decreasing relative humidity since 1994. The decreased relative humidity has a strong influence on the increased VPD and accounts for ~74% of the variance in Xinjiang. In different environments, the VPD trends followed changes in air temperature and ea, 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. © 2020 Elsevier B.V.
英文关键词	Air temperature; Relative humidity; Vapor pressure deficit (VPD); Xinjiang
语种	英语
scopus关键词	Atmospheric humidity; Drought; Hydrostatic pressure; Water vapor; Atmospheric conditions; Atmospheric water vapor; Ecological effect; Holding capacity; Related variables; Rising temperatures; Vapor pressure deficit; Vegetation dynamics; Atmospheric temperature; accuracy assessment; air temperature; annual variation; atmospheric chemistry; atmospheric dynamics; drought; mountain region; pressure field; regional climate; saturation; spatial distribution; vapor pressure; China; Xinjiang Uygur
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/141707
作者单位	College of Resources and Environment Sciences, Institute of Arid Ecology and Environment, Key Laboratory of Oasis Ecology of Ministry of Education, Xinjiang University, Urumqi, 830046, China; Institute of Desert Meteorology, China Meteorological Administration, Urumqi, 830002, China; College of Tourism, Xinjiang University of Finance and Economics, Urumqi, 830012, China
推荐引用方式 GB/T 7714	Li M.,Yao J.,Guan J.,et al. Observed changes in vapor pressure deficit suggest a systematic drying of the atmosphere in Xinjiang of China[J],2021,248.
APA	Li M.,Yao J.,Guan J.,&Zheng J..(2021).Observed changes in vapor pressure deficit suggest a systematic drying of the atmosphere in Xinjiang of China.Atmospheric Research,248.
MLA	Li M.,et al."Observed changes in vapor pressure deficit suggest a systematic drying of the atmosphere in Xinjiang of China".Atmospheric Research 248(2021).