| 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
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| Corresponding Author | Wang, Yibo(wangyib@lzu.edu.cn) |
| 2019-10-15 | |
| Source Publication | SCIENCE OF THE TOTAL ENVIRONMENT
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| ISSN | 0048-9697 |
| Volume | 687Pages:257-266 |
| Abstract | 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. |
| Keyword | Qinghai-Tibet Plateau Potential evapotranspiration Penman-Monteith model Freeze-thaw cycle |
| DOI | 10.1016/j.scitotenv.2019.06.005 |
| Indexed By | SCI |
| WOS Keyword | ACTIVE LAYER ; DEGRADATION |
| Language | 英语 |
| Funding Project | Key Project of Natural Science Foundation of China[91547203] ; National Natural Science Foundation of China[41877149] |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| WOS ID | WOS:000480316300027 |
| Funding Organization | Key Project of Natural Science Foundation of China ; National Natural Science Foundation of China |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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 Author | Wang, Yibo |
| Affiliation | 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 |
| 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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| 1-s2.0-S004896971932（4535KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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