干旱区生态环境知识资源中心(Arid): Effect of earth-air breathing on evaporation of deeply buried phreatic water in extremely arid regions

Arid

DOI	10.1002/hyp.14078
	Effect of earth-air breathing on evaporation of deeply buried phreatic water in extremely arid regions
	Li, Hongshou; Zhan, Hongtao; Wang, Xiaowei; Guo, Qinglin; Liu, Wenjun; Li, Yanfei; Gong, Yipu
通讯作者	Li, HS (corresponding author), Dunhuang Acad, Conservat Res Dept, Dunhuang 736200, Gansu, Peoples R China.
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2021
卷号	35 期号:4
英文摘要	In extremely arid regions, deeply buried phreatic water evaporates during the daytime from March to November in the northern hemisphere. It has been found that the earth-air undergoes 'autonomous breathing' and 'passive breathing', respectively caused by the changes of temperature and atmospheric pressure. In this paper, the effects of these breathing modes on phreatic evaporation (PhE) were investigated as well as the responsible mechanisms. Quantitative estimates suggest that the direct contribution from autonomous breathing is only 0.55 g center dot m(-2)center dot yr(-1). Passive breathing pumps water vapour upwards from the deeply buried phreatic water table. Film water on the soil continuously migrates in pulsation from deep layers to the upper layer. Na2SO4 in the shallow soil absorbs moisture from the earth-air at night and decomposes during the day, forming water vapour, which is critical to the occurrence of PhE. The diurnal PhE process can be elucidated in detail by the bimodal variation in the atmospheric pressure. PhE occurs mainly from 10:00 to 17:00 during daytime from March to November, which correlates with passive breathing of the earth-air. The amplitude of atmospheric fluctuation determines the amount of earth-air that outflows, while temperature determines the water vapour concentration. In calculation, PhE is equal to the net absolute humidity (AH) times the amount of earth-air. There is 1.55 mm center dot year(-1) of PhE caused by daily peak -> valley differences, and about 2.97 mm center dot year(-1) in estimation caused by numerous atmospheric fluctuations smaller than 2.84 hPa. The results coincide with the actual amount of PhE monitored of 4.52 mm center dot year(-1). Therefore, the amount of PhE is proportional to the range and frequency of fluctuation in external atmospheric pressure, and is also positively related to soil temperature, salt content, water content, porosity, and vadose zone thickness.
英文关键词	atmospheric pumping autonomous breathing earth-air passive breathing phreatic evaporation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000645220700022
WOS关键词	SOIL ; TRANSPORT ; MOVEMENT
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350505
作者单位	[Li, Hongshou; Zhan, Hongtao; Wang, Xiaowei; Guo, Qinglin; Li, Yanfei; Gong, Yipu] Dunhuang Acad, Conservat Res Dept, Dunhuang 736200, Gansu, Peoples R China; [Li, Hongshou; Zhan, Hongtao; Wang, Xiaowei; Guo, Qinglin; Li, Yanfei; Gong, Yipu] State Adm Cultural Heritage, Key Sci Res Base Conservat Ancient Wall Paintings, Dunhuang, Gansu, Peoples R China; [Li, Hongshou; Zhan, Hongtao; Wang, Xiaowei; Guo, Qinglin; Li, Yanfei; Gong, Yipu] Natl Res Ctr Conservat Ancient Wall Paintings & E, Dunhuang, Gansu, Peoples R China; [Liu, Wenjun] Tianshui Agr Sch, Qingshui, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Hongshou,Zhan, Hongtao,Wang, Xiaowei,et al. Effect of earth-air breathing on evaporation of deeply buried phreatic water in extremely arid regions[J],2021,35(4).
APA	Li, Hongshou.,Zhan, Hongtao.,Wang, Xiaowei.,Guo, Qinglin.,Liu, Wenjun.,...&Gong, Yipu.(2021).Effect of earth-air breathing on evaporation of deeply buried phreatic water in extremely arid regions.HYDROLOGICAL PROCESSES,35(4).
MLA	Li, Hongshou,et al."Effect of earth-air breathing on evaporation of deeply buried phreatic water in extremely arid regions".HYDROLOGICAL PROCESSES 35.4(2021).