Advancing Evapotranspiration Modeling With Optimized Soil and Canopy Resistance Combinations
Abstract Dual‐source remotely sensed evapotranspiration (ET) models require accurate separation of soil evaporation (Es), plant transpiration (Ec), and precipitation interception (Ei) based on soil and canopy resistances. Despite the availability of several ET products and algorithms, comprehensive...
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Wiley
2025-06-01
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| Series: | Water Resources Research |
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| Online Access: | https://doi.org/10.1029/2024WR039252 |
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| author | Jinfeng Zhao Shikun Sun Yali Yin Yihe Tang Chong Li Yongshan Liang Yubao Wang Alexander Winkler Shijie Jiang |
| author_facet | Jinfeng Zhao Shikun Sun Yali Yin Yihe Tang Chong Li Yongshan Liang Yubao Wang Alexander Winkler Shijie Jiang |
| author_sort | Jinfeng Zhao |
| collection | DOAJ |
| description | Abstract Dual‐source remotely sensed evapotranspiration (ET) models require accurate separation of soil evaporation (Es), plant transpiration (Ec), and precipitation interception (Ei) based on soil and canopy resistances. Despite the availability of several ET products and algorithms, comprehensive evaluations of resistance configurations remain scarce. This study systematically evaluates various combinations of five soil resistance methods, eight canopy resistance methods, and two precipitation interception algorithms within the Shuttleworth‐Wallace (S‐W) framework. Using eddy covariance data from 119 FLUXNET sites and the latest ET products, we find that the Ball‐Berry‐Leuning method, unified stomatal method, and RL empirical method provide comparable and top‐ranked performance across plant functional types (PFTs) and climate zones, with only a single free parameter calibrated by genetic algorithm. The power function method (S2), sensitive to soil surface water content proves to be the most effective for modeling Es, particularly in water‐limited regions. The performance of best‐performing but unexplored combinations (S2‐C1, S2‐C2, S2‐C5) is consistent with PML‐V2, GLEAM4, and underlying water use efficiency model, explaining 56% of the variation in daily ET and achieving an root mean square error as low as 1.02 mm day−1. However, these models show reduced accuracy in arid zones, where prolonged water stress led to a 38% reduction in R2. This highlights the need for a more accurate representation of soil moisture stress in arid regions, which is often overlooked in existing models. Our study offers robust, parsimonious, and broadly applicable models for ET estimation across PFTs and climate zones. |
| format | Article |
| id | doaj-art-cc28ca0448e747b6a4e7948ec0a0a648 |
| institution | Kabale University |
| issn | 0043-1397 1944-7973 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Wiley |
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| series | Water Resources Research |
| spelling | doaj-art-cc28ca0448e747b6a4e7948ec0a0a6482025-08-20T03:29:48ZengWileyWater Resources Research0043-13971944-79732025-06-01616n/an/a10.1029/2024WR039252Advancing Evapotranspiration Modeling With Optimized Soil and Canopy Resistance CombinationsJinfeng Zhao0Shikun Sun1Yali Yin2Yihe Tang3Chong Li4Yongshan Liang5Yubao Wang6Alexander Winkler7Shijie Jiang8Key Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education Northwest A&F University Yangling P. R. ChinaKey Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education Northwest A&F University Yangling P. R. ChinaKey Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education Northwest A&F University Yangling P. R. ChinaKey Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education Northwest A&F University Yangling P. R. ChinaKey Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education Northwest A&F University Yangling P. R. ChinaKey Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education Northwest A&F University Yangling P. R. ChinaKey Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education Northwest A&F University Yangling P. R. ChinaDepartment for Biogeochemical Integration Max Planck Institute for Biogeochemistry Jena GermanyDepartment for Biogeochemical Integration Max Planck Institute for Biogeochemistry Jena GermanyAbstract Dual‐source remotely sensed evapotranspiration (ET) models require accurate separation of soil evaporation (Es), plant transpiration (Ec), and precipitation interception (Ei) based on soil and canopy resistances. Despite the availability of several ET products and algorithms, comprehensive evaluations of resistance configurations remain scarce. This study systematically evaluates various combinations of five soil resistance methods, eight canopy resistance methods, and two precipitation interception algorithms within the Shuttleworth‐Wallace (S‐W) framework. Using eddy covariance data from 119 FLUXNET sites and the latest ET products, we find that the Ball‐Berry‐Leuning method, unified stomatal method, and RL empirical method provide comparable and top‐ranked performance across plant functional types (PFTs) and climate zones, with only a single free parameter calibrated by genetic algorithm. The power function method (S2), sensitive to soil surface water content proves to be the most effective for modeling Es, particularly in water‐limited regions. The performance of best‐performing but unexplored combinations (S2‐C1, S2‐C2, S2‐C5) is consistent with PML‐V2, GLEAM4, and underlying water use efficiency model, explaining 56% of the variation in daily ET and achieving an root mean square error as low as 1.02 mm day−1. However, these models show reduced accuracy in arid zones, where prolonged water stress led to a 38% reduction in R2. This highlights the need for a more accurate representation of soil moisture stress in arid regions, which is often overlooked in existing models. Our study offers robust, parsimonious, and broadly applicable models for ET estimation across PFTs and climate zones.https://doi.org/10.1029/2024WR039252transpirationevaporationcanopy resistancesoil resistancePFTs |
| spellingShingle | Jinfeng Zhao Shikun Sun Yali Yin Yihe Tang Chong Li Yongshan Liang Yubao Wang Alexander Winkler Shijie Jiang Advancing Evapotranspiration Modeling With Optimized Soil and Canopy Resistance Combinations Water Resources Research transpiration evaporation canopy resistance soil resistance PFTs |
| title | Advancing Evapotranspiration Modeling With Optimized Soil and Canopy Resistance Combinations |
| title_full | Advancing Evapotranspiration Modeling With Optimized Soil and Canopy Resistance Combinations |
| title_fullStr | Advancing Evapotranspiration Modeling With Optimized Soil and Canopy Resistance Combinations |
| title_full_unstemmed | Advancing Evapotranspiration Modeling With Optimized Soil and Canopy Resistance Combinations |
| title_short | Advancing Evapotranspiration Modeling With Optimized Soil and Canopy Resistance Combinations |
| title_sort | advancing evapotranspiration modeling with optimized soil and canopy resistance combinations |
| topic | transpiration evaporation canopy resistance soil resistance PFTs |
| url | https://doi.org/10.1029/2024WR039252 |
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