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Effects of the freeze-thaw cycle on potential evapotranspiration in the permafrost regions of the Qinghai-Tibet Plateau, China
Liu, Xin1; Yang, Wenjing1; Zhao, Haipeng1; Wang, Yibo1,2; Wang, Genxu3
Corresponding AuthorWang, Yibo(wangyib@lzu.edu.cn)
2019-10-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume687Pages:257-266
AbstractPotential 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.
KeywordQinghai-Tibet Plateau Potential evapotranspiration Penman-Monteith model Freeze-thaw cycle
DOI10.1016/j.scitotenv.2019.06.005
Indexed BySCI
WOS KeywordACTIVE LAYER ; DEGRADATION
Language英语
Funding ProjectKey Project of Natural Science Foundation of China[91547203] ; National Natural Science Foundation of China[41877149]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000480316300027
Funding OrganizationKey Project of Natural Science Foundation of China ; National Natural Science Foundation of China
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26954
Collection山地灾害与地表过程重点实验室
山地表生过程与生态调控重点实验室
Corresponding AuthorWang, Yibo
Affiliation1.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
Recommended Citation
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.
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