干旱区生态环境知识资源中心(Arid): Effects of desertification on permafrost environment in Qinghai-Tibetan Plateau

Arid

DOI	10.1016/j.jenvman.2020.110302
	Effects of desertification on permafrost environment in Qinghai-Tibetan Plateau
	Chen, Lin2,4,5 ; Yu, Wenbing 1,2,3; Han, Fenglei 1,3; Lu, Yan 2; Zhang, Tianqi 2
通讯作者	Chen, Lin ; Yu, Wenbing
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2020
卷号	262
英文摘要	Soil thermal state exerts an important role in soil physicochemical properties, nutrient content, soil carbon losses, and hydrological processes in cold regions. In the Qinghai-Tibet Plateau, desertification and aeolian sand accumulation greatly change the surface cover types and simultaneously alter the surface energy budget. However, the quantification of their impacts on the soil thermal state hasn't been studied methodically. Here, a laboratory experiment was conducted to investigate the impact of surface cover types, including bare surface, grass-coved surface, dry and wet (3%) aeolian sand-covered surface, on underlying soil thermal state. Our results demonstrate that there is a reciprocal relationship between environment change and permafrost degradation. The amount of heat entering the active layer was determined by the surface cover types and soil water content. Using the bare surface case as a reference, vegetation layer acted as a buffer to reduce the amount of heat propagation downwards the ground by 20% and to lower the near surface temperature by 0.7 degrees C. In contrast, dry aeolian sand acted as an insulation layer and warmed the ground by about 2 degrees C. Also, wet aeolian sand with high thermal conductivity facilitated the heat exchange with the atmosphere and warmed the ground about 1.5 degrees C. Our results have implications for thermal and hydrological processes in the atmosphere-ground-permafrost system and thermal stability of infrastructure under the effect of the desertification and aeolian sand accumulation. The hydrothermal interaction of desertification and permafrost needs to be quantified in the further study through long-term field observations and a fully-coupled water flow and heat transport model under a changing climate.
英文关键词	Aeolian sand Heat transfer Vegetation Permafrost Qinghai-Tibet Plateau
类型	Article
语种	英语
国家	Peoples R China ; Canada
收录类别	SCI-E
WOS记录号	WOS:000527016200029
WOS关键词	ACTIVE-LAYER THICKNESS ; CLIMATE-CHANGE ; HEAT-TRANSFER ; CRUSHED-ROCK ; DEGRADATION ; SURFACE ; TEMPERATURE ; SIMULATION ; IMPACT ; THAW
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319108
作者单位	1.Chongqing Jiaotong Univ, State Key Lab Mt Bridge & Tunnel Engn, Chongqing 400074, Peoples R China; 2.Chinese Acad Sci, State Key Lab Frozen Soil Engn, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; 3.Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing 400074, Peoples R China; 4.Univ Montreal, Ctr Northern Studies, Montreal, PQ H2B 2V8, Canada; 5.Univ Montreal, Geog Dept, Montreal, PQ H2B 2V8, Canada
推荐引用方式 GB/T 7714	Chen, Lin,Yu, Wenbing,Han, Fenglei,et al. Effects of desertification on permafrost environment in Qinghai-Tibetan Plateau[J],2020,262.
APA	Chen, Lin,Yu, Wenbing,Han, Fenglei,Lu, Yan,&Zhang, Tianqi.(2020).Effects of desertification on permafrost environment in Qinghai-Tibetan Plateau.JOURNAL OF ENVIRONMENTAL MANAGEMENT,262.
MLA	Chen, Lin,et al."Effects of desertification on permafrost environment in Qinghai-Tibetan Plateau".JOURNAL OF ENVIRONMENTAL MANAGEMENT 262(2020).