Effects of the freeze-thaw cycle on potential evapotranspiration in the permafrost regions of the Qinghai-Tibet Plateau, China
文献类型：期刊论文
| 作者 | Liu, Xin1; Yang, Wenjing1; Zhao, Haipeng1; Wang, Yibo1,2; Wang, Genxu3
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 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. |
| WOS关键词 | ACTIVE LAYER ; DEGRADATION |
| 资助项目 | Key Project of Natural Science Foundation of China[91547203] ; National Natural Science Foundation of China[41877149] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000480316300027 |
| 出版者 | ELSEVIER |
| 资助机构 | Key Project of Natural Science Foundation of China ; National Natural Science Foundation of China |
| 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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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