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Surface Flux Equilibrium Theory-Derived Evapotranspiration Estimate Outperforms ECOSTRESS, MODIS, and SSEBop products
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| Created: | Jan 17, 2025 at 9:23 p.m. | |
| Last updated: | Jan 17, 2025 at 9:38 p.m. | |
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| Sharing Status: | Public |
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Abstract
Evapotranspiration (ET) is a critical process influencing energy, water, and carbon cycles. Numerous methods have been developed to estimate ET accurately and robustly across diverse scales. Many of these methods are constrained by reliance on remote sensing data, which is prone to gaps, or by the need for model calibration and training. This study evaluates the performance of the calibration-free Surface Flux Equilibrium Theory (SFET) for ET estimation at 33 Ameriflux sites in the continental USA. SFET-derived ET estimates are intercompared with widely used continental remote sensing products, including ECOSTRESS, MODIS, and SSEBop. Results indicate that SFET consistently outperforms these ET products. SFET’s performance is found to be better under wet conditions and clear skies, with reduced accuracy under arid and high evaporative stress conditions. Overall, SFET exhibits significant potential for providing accurate, continuous, long-term ET estimates, paving the way for operational application in uninstrumented regions over large scales.
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README.txt
This repository includes the data and code used to generate the results and figures for the paper: "Surface Flux Equilibrium Theory-Derived Evapotranspiration Estimate Outperforms ECOSTRESS, MODIS, and SSEBop Products." It contains multiple files and folders. Below is a description of some important files and folders. Folders: a) Analysis: Contains extracted ET data for all products and SFET setups, along with observation data. b) Plots_paper: Contains all the main and supplementary figures from the paper. c) Other folders in .zip format: Contain various files required for the analysis. Codes: a) The Jupyter Notebook script plots_python.ipynb is used for plotting figures. b) The R scripts Figures1.R to Figures5.R are used for plotting figures. Outputs: a) All main figures. b) Multiple files generation which are required in the analysis and figures generation.
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This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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