Daily Evapotranspiration Estimations by Direct Calculation and Temporal Upscaling Based on Field and MODIS Data
文献类型：期刊论文
| 作者 | Jiang, Yazhen1,2; Wang, Junrui1,2; Wang, Yafei1,2,3 |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 14期号:16页码:19 |
| 关键词 | evapotranspiration direct calculation temporal upscaling constant reference evaporative fraction |
| DOI | 10.3390/rs14164094 |
| 通讯作者 | Wang, Yafei(wangyafei@igsnrr.ac.cn) |
| 英文摘要 | Daily evapotranspiration (ET) integration is essential to various applications of agricultural water planning and management, ecohydrology, and energy balance studies. The constant reference evaporative fraction (EFr) temporal upscaling method has been proven to be efficient in extrapolating instantaneous ET to a daily timescale. Unlike upscaling methods, the direct calculation (DC) method developed in our previous study directly estimates daily ET without calculating instantaneous ET. The present study aimed to compare daily estimations of ET using the EFr and DC methods based on field and MODIS data at a site from the ChinaFLUX network. The estimation results were validated by eddy covariance (EC) ET both with and without the correction of energy imbalance. Based on field data, the results show that (i) the DC method performed with higher accuracy when compared to uncorrected EC measurements, while daily ET from both methods was overestimated; (ii) the DC method still performed better after the EC ET was corrected by the Residual Energy scheme, and the overestimations were significantly decreased; (iii) both methods performed best when compared with corrected ET by the Bowen Ratio scheme. The results from satellite data reveal that (i) the constant EFr method overestimated daily ET by a mean-bias-error (MBE) of 5.6 W/m(2), and a root-mean-square error (RMSE) of 18.6 W/m(2); and (ii) the DC method underestimated daily ET by a smaller MBE of -4.8 W/m(2) and an RMSE of 22.5 W/m(2). Therefore, the DC method has similar or better performance than the widely used constant EFr upscaling method and can estimate daily ET directly and effectively. |
| WOS关键词 | INSTANTANEOUS EVAPOTRANSPIRATION ; EVAPORATIVE FRACTION ; SATELLITE ; MODEL ; TIME ; RECONSTRUCTION ; VEGETATION ; RADIATION ; ACCURACY ; FLUXES |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDA28060400] ; National Natural Science Foundation of China[42001306] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000845274900001 |
| 出版者 | MDPI |
| 资助机构 | Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/182378]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Yafei |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Reg Sustainable Dev Modelling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Yazhen,Wang, Junrui,Wang, Yafei. Daily Evapotranspiration Estimations by Direct Calculation and Temporal Upscaling Based on Field and MODIS Data[J]. REMOTE SENSING,2022,14(16):19. |
| APA | Jiang, Yazhen,Wang, Junrui,&Wang, Yafei.(2022).Daily Evapotranspiration Estimations by Direct Calculation and Temporal Upscaling Based on Field and MODIS Data.REMOTE SENSING,14(16),19. |
| MLA | Jiang, Yazhen,et al."Daily Evapotranspiration Estimations by Direct Calculation and Temporal Upscaling Based on Field and MODIS Data".REMOTE SENSING 14.16(2022):19. |
入库方式： OAI收割
来源：地理科学与资源研究所
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