Improving Actual Evapotranspiration Estimation Integrating Energy Consumption for Ice Phase Change Across the Tibetan Plateau
文献类型：期刊论文
| 作者 | Wang Genxu ; Lin Shan; Hu Zhaoyong; Lu Yaqiong; Sun Xiangyang; Huang Kewei
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
 |
| 出版日期 | 2020 |
| 卷号 | 125期号:3页码:e2019JD031799 |
| ISSN号 | 2169-897X |
| DOI | 10.1029/2019JD031799 |
| 产权排序 | 1 |
| 通讯作者 | Hu, Zhaoyong(huzy418@imde.ac.cn) ; Lu, Yaqiong(yaqiong@imde.ac.cn) |
| 文献子类 | Article |
| 英文摘要 | Permafrost thawing over the Tibetan Plateau (TP) is a consequence of climatic warming, which will change local hydrological processes remarkably. Evapotranspiration (ET) is an important local hydrological process indicator that needs to be well quantified. Several methods have been applied to estimate the ET. However, energy consumed by thawing was neglected in ET estimation on TP. Here a simple but effective method was introduced to represent the energy consumption due to ice phase changes in the generalized nonlinear complementary principle. Our method improved ET estimation by 4.60-106.67% in the nonlinear complementary model, validated at five eddy flux observation sites. With the new formulation, we analyzed the spatiotemporal patterns of ET and their driving factors during 1961-2014. The spatial averaged ET was 294.21 mm/year and decreased from southeast to northwest areas, cocontrolled by precipitation (P-re) and net radiation (R-n); dominated by the R-n in the warm-humid areas while by the P-re in the cold-dry areas. The temporal pattern of ET over the TP showed an increasing trend during 1961-2014, with a rate of 0.38 mm/year. The variations in air temperature (T-air) and R-n could explain 79.1% of the temporal variations in ET over the TP during the past 54 years, indicating atmosphere demand is the dominant factor on ET temporal variation. We also found that permafrost thawing accelerated the ET increases in the last 15 years over the transitional permafrost and seasonal permafrost areas, suggesting that degradation and ablation of permafrost under climatic changes will lead to accelerated ET. |
| 电子版国际标准刊号 | 2169-8996 |
| WOS关键词 | COMPLEMENTARY PRINCIPLE ; WATER ; EVAPORATION ; TRENDS ; CARBON ; FUTURE ; CHINA ; FLUX |
| 资助项目 | National Natural Science Foundation of China[91547203] ; National Natural Science Foundation of China[41890821] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20050102] |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000521086600025 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences |
| 源URL | [http://ir.imde.ac.cn/handle/131551/34134]  |
| 专题 | 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 | Hu Zhaoyong; Lu Yaqiong |
| 作者单位 | Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China |
| 推荐引用方式 GB/T 7714 | Wang Genxu,Lin Shan,Hu Zhaoyong,et al. Improving Actual Evapotranspiration Estimation Integrating Energy Consumption for Ice Phase Change Across the Tibetan Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(3):e2019JD031799. |
| APA | Wang Genxu,Lin Shan,Hu Zhaoyong,Lu Yaqiong,Sun Xiangyang,&Huang Kewei.(2020).Improving Actual Evapotranspiration Estimation Integrating Energy Consumption for Ice Phase Change Across the Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(3),e2019JD031799. |
| MLA | Wang Genxu,et al."Improving Actual Evapotranspiration Estimation Integrating Energy Consumption for Ice Phase Change Across the Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.3(2020):e2019JD031799. |
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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