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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zhang, Yuhu Yao, Yunjun Lin, Yi Xiang, Liu |
| Copyright Year | 2016 |
| Abstract | Satellite-based evapotranspiration (ET) estimation plays an important role in monitoring surface drought of the Xinjiang Uygur Autonomous Region of China (XUARC) because ET is a key indicator of drought severity. In this study, the evaporative wet index (EWI) is defined as the ratio of ET to potential ET (PET) based on a satellite-based hybrid Priestley-Taylor (Hybrid-PT) algorithm driven by the Advanced Very High Resolution Radiometer (AVHRR) Normalized difference vegetation index and the interpolated gridded meteorological data at a spatial resolution of 0.05°. The estimated ET is rigorously validated with eddy covariance (EC) observations. The validation result shows that the root-mean-square error (RMSE) is 0.75 mm and the square of the correlation coefficients (R $^{2}$) for the Fukang (FK) site is more than 0.5 for the comparison between the ground-measured and estimated daily ET at the Fukang (FK) site. We found a good correspondence between their spatiotemporal patterns of both EWI and precipitation (P) anomalies. We also found that widely significant decreasing trends in EWI, ET and P appears from 1982 to 2009 in central regions of XUARC. The EWI can effectively reflect the variation in surface moisture and it has provided a favorable tool for regional drought monitoring. |
| Starting Page | 1 |
| Ending Page | 13 |
| Page Count | 13 |
| File Format | |
| ISSN | 18666280 |
| Journal | Environmental Earth Sciences |
| Volume Number | 75 |
| Issue Number | 6 |
| e-ISSN | 18666299 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2016-03-10 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Drought monitoring Evapotranspiration Evaporative wet index Xinjiang Uygur Autonomous Region Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology |
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