Effects of the freeze-thaw cycle on potential evapotranspiration in the permafrost regions of the Qinghai-Tibet Plateau, China

doi:10.1016/j.scitotenv.2019.06.005

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 > 山地灾害与地表过程重点实验室

	Effects of the freeze-thaw cycle on potential evapotranspiration in the permafrost regions of the Qinghai-Tibet Plateau, China
	Liu, Xin 1; Yang, Wenjing 1; Zhao, Haipeng 1; Wang, Yibo 1,2; Wang, Genxu3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-10-15
卷号	687 页码:257-266
关键词	Qinghai-Tibet Plateau Potential evapotranspiration Penman-Monteith model Freeze-thaw cycle
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.06.005
通讯作者	Wang, Yibo(wangyib@lzu.edu.cn)
英文摘要	Potential evapotranspiration (ET0) is one of the important indicators for characterizing atmospheric evapotranspiration, but arduous observation conditions lead to a relative lack in the understanding of the ET0 mechanismin cold, high-elevation regions. The study of the sensitivity coefficient and contribution rate of meteorological elements to ET0 under the effects of the freeze-thaw cycle in the permafrost regions of the Qinghai-Tibet Plateau (QTP) showed that air temperature (T) and ET0 had similar change trends, which reached a peak during the summer thawing period (ST). Furthermore, analysis of meteorological elements in different freeze-thaw stages of the active layer soil revealed that the contribution rate of each meteorological element to ET0 showed a seasonal distinction. The sensitivity coefficient and contribution rate of the net radiation (R-n) and vapor pressure deficit (VPD) to ET0 were high, and their mean values were 0.52 and 0.44, respectively. In contrast, the sensitivity coefficient and contribution rate of wind speed (u(2)) and T to ET0 were very small, and the mean values of the sensitivity coefficient were 0.08 and 0.01, respectively. Additionally, T had the lowest contribution rate to ET0. These results indicated that permafrost had a stable regulatory effect on T. The results are expected to be helpful in developing a process-based frozen soil hydrological model. (C) (2019 Elsevier B.V. All rights reserved.
资助项目	Key Project of Natural Science Foundation of China[91547203] ; National Natural Science Foundation of China[41877149]
WOS关键词	ACTIVE LAYER ; DEGRADATION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000480316300027
资助机构	Key Project of Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/26954]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Wang, Yibo
作者单位	1.Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolvement & Regulat, Chengdu 610041, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xin,Yang, Wenjing,Zhao, Haipeng,et al. Effects of the freeze-thaw cycle on potential evapotranspiration in the permafrost regions of the Qinghai-Tibet Plateau, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,687:257-266.
APA	Liu, Xin,Yang, Wenjing,Zhao, Haipeng,Wang, Yibo,&Wang, Genxu.(2019).Effects of the freeze-thaw cycle on potential evapotranspiration in the permafrost regions of the Qinghai-Tibet Plateau, China.SCIENCE OF THE TOTAL ENVIRONMENT,687,257-266.
MLA	Liu, Xin,et al."Effects of the freeze-thaw cycle on potential evapotranspiration in the permafrost regions of the Qinghai-Tibet Plateau, China".SCIENCE OF THE TOTAL ENVIRONMENT 687(2019):257-266.