气候变化领域集成服务门户(CCPortal): Hydro-thermal behaviors of the ground under different surfaces in the Qinghai-Tibet Plateau

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DOI	10.1016/j.coldregions.2019.03.002
	Hydro-thermal behaviors of the ground under different surfaces in the Qinghai-Tibet Plateau
	Lu, Jianguo; Zhang, Mingyi; Pei, Wansheng
发表日期	2019
ISSN	0165-232X
EISSN	1872-7441
起始页码	99
结束页码	106
卷号	161
英文摘要	The hydro-thermal properties of the ground affect the thermal regimes and surface energy balances. A field experiment in the Qinghai-Tibet Plateau was carried out to analyze the hydro-thermal boundaries, and the variations of the ground temperatures, volumetric unfrozen water contents and matric suctions for different surfaces (i.e., asphalt surface, concrete surface and natural gravel surface). The results show that the asphalt surface significantly changes the permafrost table and ground temperature. The mean annual temperature under the asphalt surface is 2.40 degrees C higher than that under the concrete surface, and 2.77 degrees C higher than that under the natural gravel surface. Therefore, the permafrost table under the asphalt surface is deeper than that under the natural gravel and concrete surfaces. In addition, the freezing and thawing processes of the ground under different surfaces are significantly different. Moreover, the volumetric unfrozen water content changes quickly near the ice-water phase transition zone, while the matric suction seldom changes until the volumetric unfrozen water reaches a certain value during the cold seasons, and the volumetric unfrozen water content dramatically changes due to the rainfall during the warm seasons. Furthermore, the volumetric unfrozen water content first decreases, and then increases with depth in the cross sections of the embankments during the cold seasons. The minimum volumetric unfrozen water content lies at the depth of 0.40 m for the natural gravel surface, and 0.90 m for the asphalt and concrete surfaces.
英文关键词	Temperature; Volumetric unfrozen water content; Matric suction; Field experiment; Different surfaces; Permafrost
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	UNFROZEN WATER-CONTENT ; PERMAFROST REGIONS ; COOLING PERFORMANCE ; MECHANICAL-BEHAVIOR ; ASPHALT PAVEMENT ; FIELD EXPERIMENT ; SUNNY SLOPES ; SILTY SAND ; EMBANKMENT ; TEMPERATURE
WOS记录号	WOS:000462759100010
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/240135
作者单位	[Lu, Jianguo; Zhang, Mingyi; Pei, Wansheng] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China; [Lu, Jianguo; Zhang, Mingyi; Pei, Wansheng] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lu, Jianguo,Zhang, Mingyi,Pei, Wansheng. Hydro-thermal behaviors of the ground under different surfaces in the Qinghai-Tibet Plateau[J]. 中国科学院西北生态环境资源研究院,2019,161.
APA	Lu, Jianguo,Zhang, Mingyi,&Pei, Wansheng.(2019).Hydro-thermal behaviors of the ground under different surfaces in the Qinghai-Tibet Plateau.COLD REGIONS SCIENCE AND TECHNOLOGY,161.
MLA	Lu, Jianguo,et al."Hydro-thermal behaviors of the ground under different surfaces in the Qinghai-Tibet Plateau".COLD REGIONS SCIENCE AND TECHNOLOGY 161(2019).