Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau

doi:10.1007/s11629-018-5153-5

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2019 > Vol16 No.2

	Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau
	Li De-sheng; Wen Zhi; Cheng Qian-gong; Xing Ai-guo; Zhang Ming-li; Li An-yuan
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
卷号	16 期号:2 页码:309-322
关键词	Active layer Precipitation Qinghai-Tibet plateau Hydro-thermal dynamic
ISSN号	1672-6316
DOI	10.1007/s11629-018-5153-5
文献子类	Article
英文摘要	Precipitation has a significant influence on the hydro-thermal state of the active layer in permafrost regions, which disturbs the surface energy balance, carbon flux, ecosystem, hydrological cycles and landscape processes. To better understand the hydro-thermal dynamics of active layer and the interactions between rainfall and permafrost, we applied the coupled heat and mass transfer model for soil-plant-atmosphere system into high-altitude permafrost regions in this study. Meteorological data, soil temperature, heat flux and moisture content from different depths within the active layer were used to calibrate and validate this model. Thereafter, the precipitation was increased to explore the effect of recent climatic wetting on the thermal state of the active layer. The primary results demonstrate that the variation of active layer thickness under the effect of short-term increased precipitation is not obvious, while soil surface heat flux can show the changing trends of thermal state in active layer, which should not be negligible. An increment in year-round precipitation leads to a cooling effect on active layers in the frozen season, i.e. verifying the insulating effect of snow cover. However, in the thawed season, the increased precipitation created a heating effect on active layers, i.e. facilitating the degradation of permafrost. The soil thermal dynamic in single precipitation event reveals that the precipitation event seems to cool the active layer, while compared with the results under increased precipitation, climatic wetting trend has a different influence on the permafrost evolution.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000458657000006
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46430]
专题	Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.2
推荐引用方式 GB/T 7714	Li De-sheng,Wen Zhi,Cheng Qian-gong,et al. Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(2):309-322.
APA	Li De-sheng,Wen Zhi,Cheng Qian-gong,Xing Ai-guo,Zhang Ming-li,&Li An-yuan.(2019).Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau.JOURNAL OF MOUNTAIN SCIENCE,16(2),309-322.
MLA	Li De-sheng,et al."Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau".JOURNAL OF MOUNTAIN SCIENCE 16.2(2019):309-322.