干旱区生态环境知识资源中心(Arid): In-Situ Monitoring and Characteristic Analysis of Freezing-Thawing Cycles in a Deep Vadose Zone

Arid

DOI	10.3390/w12051261
	In-Situ Monitoring and Characteristic Analysis of Freezing-Thawing Cycles in a Deep Vadose Zone
	Zheng, Ce; Lu, Yudong; Liu, Xiuhua; Simunek, Jiri; Zeng, Yijian; Shi, Changchun; Li, Huanhuan
通讯作者	Liu, XH
来源期刊	WATER
EISSN	2073-4441
出版年	2020
卷号	12 期号:5
英文摘要	Freeze-thaw cycles play a critical role in affecting ecosystem services in arid regions. Monitoring studies of soil temperature and moisture during a freeze-thaw process can generate data for research on the coupled movement of water, vapor, and heat during the freezing-thawing period which can, in turn, provide theoretical guidance for rational irrigation practices and ecological protection. In this study, the soil temperature and moisture changes in the deep vadose zone were observed by in-situ monitoring from November 2017 to March 2018 in the Mu Us Desert. The results showed that changes in soil temperatures and temperature gradients were largest in soil layers above the 100-cm depth, and variations decreased with soil depth. The relationship between soil temperature and unfrozen water content can be depicted well by both theoretical and empirical models. Due to gradients of the matric potential and temperature, soil water flowed from deeper soil layers towards the frozen soil, increasing the total water content at the freezing front. The vapor flux, which was affected mainly by temperature, showed diurnal variations in the shallow 20-cm soil layer, and its rate and variations decreased gradually with increasing soil depths. The freeze-thaw process can be divided into three stages: the initial freezing stage, the downward freezing stage, and the thawing stage. The upward vapor flux contributed to the formation of the frozen layer during the freezing process.
英文关键词	freeze-thaw process soil temperature and moisture unfrozen water content water vapor deep vadose zone
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000555915200040
WOS关键词	UNFROZEN WATER-CONTENT ; HEAT-TRANSPORT ; NUMERICAL-ANALYSIS ; COUPLED WATER ; FROZEN SOIL ; DYNAMICS ; VAPOR ; DESERT ; MODEL ; LAYER
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325415
作者单位	[Zheng, Ce; Lu, Yudong; Liu, Xiuhua; Li, Huanhuan] Changan Univ, Sch Water & Environm, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Minist Educ, Xian 710054, Peoples R China; [Zheng, Ce; Simunek, Jiri] Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA; [Liu, Xiuhua] Changan Univ, Shaanxi Key Lab Land Consolidat, Xian 710064, Peoples R China; [Zeng, Yijian] Univ Twente, Fac Geoinformat & Earth Observat ITC, Hengelosestr 99, NL-7514 AE Enschede, Netherlands; [Shi, Changchun] China State Long Term Observat & Res Stn Mu Us De, Yulin 719000, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Ce,Lu, Yudong,Liu, Xiuhua,et al. In-Situ Monitoring and Characteristic Analysis of Freezing-Thawing Cycles in a Deep Vadose Zone[J],2020,12(5).
APA	Zheng, Ce.,Lu, Yudong.,Liu, Xiuhua.,Simunek, Jiri.,Zeng, Yijian.,...&Li, Huanhuan.(2020).In-Situ Monitoring and Characteristic Analysis of Freezing-Thawing Cycles in a Deep Vadose Zone.WATER,12(5).
MLA	Zheng, Ce,et al."In-Situ Monitoring and Characteristic Analysis of Freezing-Thawing Cycles in a Deep Vadose Zone".WATER 12.5(2020).