Revisiting Daily MODIS Evapotranspiration Algorithm Using Flux Tower Measurements in China
文献类型：期刊论文
| 作者 | Huang, Lei2,3; Steenhuis, Tammo S.3; Luo, Yong2; Tang, Qiuhong1,4; Tang, Ronglin1,5; Zheng, Junqing2; Shi, Wen2; Qiao, Chen2 |
| 刊名 | EARTH AND SPACE SCIENCE
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 8期号:10页码:32 |
| 关键词 | evapotranspiration evaporative fraction MODIS remote sensing |
| DOI | 10.1029/2021EA001818 |
| 通讯作者 | Steenhuis, Tammo S.(tammo@cornell.edu) ; Luo, Yong(yongluo@mail.tsinghua.edu.cn) |
| 英文摘要 | Evapotranspiration (ET) is the major component of the hydrology cycle. Satellites provide a convenient way for gathering information to estimate regional ET. The most widely applied method for converting the instantaneous satellite measurement to daily scale assumes that evaporative fraction (EF), defined as the ratio of ET to the available energy, is constant during the daytime. However, this method was proved to underestimate the daily ET. This study implemented a theoretically improved EF algorithm to calculate daily ET with the decoupling factor method based on the Penman-Monteith and McNaughton-Jarvis equations. Seven improved algorithms were developed by assuming that various parameters remain constant during the day. The satellite-based ET estimates were compared with seven local flux tower measurements in China. The results showed that: (a) The original ET method calculated the daily evaporation more accurately than the other algorithms. However, the good fit was based on two compensating inaccuracies. Compared to the flux tower measurement, the original ET method underestimated the daily EF by 26% and overestimated the daily net radiation by 30%. (b) Six of the seven proposed algorithms underpredicted the daily ET by 30%-60%, mainly due to the inaccurate daily net radiation. (c) The algorithm that assumed that the instantaneous decoupling parameter Omega* was equal to its daily value method calculated EF and ET with relative errors of 8% and 10% separately when the inaccurate estimated daily net radiation was replaced by the observed flux tower data. |
| WOS关键词 | PRIESTLEY-TAYLOR PARAMETER ; ENERGY-BALANCE CLOSURE ; EVAPORATIVE FRACTION ; GLOBAL EVAPOTRANSPIRATION ; TERRESTRIAL ECOSYSTEMS ; DIURNAL-VARIATION ; SURFACE ; LAYER ; CARBON ; BEHAVIOR |
| 资助项目 | National Key Research and Development Program of China[2017YFA0603703] |
| WOS研究方向 | Astronomy & Astrophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000711969700026 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/167347]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Steenhuis, Tammo S.; Luo, Yong |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing, Peoples R China 2.Tsinghua Univ, Key Lab Earth Syst Modeling, Minist Educ, Dept Earth Syst Sci, Beijing, Peoples R China 3.Cornell Univ, Dept Biol & Environm Engn, Ithaca, NY 14850 USA 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Lei,Steenhuis, Tammo S.,Luo, Yong,et al. Revisiting Daily MODIS Evapotranspiration Algorithm Using Flux Tower Measurements in China[J]. EARTH AND SPACE SCIENCE,2021,8(10):32. |
| APA | Huang, Lei.,Steenhuis, Tammo S..,Luo, Yong.,Tang, Qiuhong.,Tang, Ronglin.,...&Qiao, Chen.(2021).Revisiting Daily MODIS Evapotranspiration Algorithm Using Flux Tower Measurements in China.EARTH AND SPACE SCIENCE,8(10),32. |
| MLA | Huang, Lei,et al."Revisiting Daily MODIS Evapotranspiration Algorithm Using Flux Tower Measurements in China".EARTH AND SPACE SCIENCE 8.10(2021):32. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。