Assessing evapotranspiration observed from ECOSTRESS using flux measurements in agroecosystems

Wu，Jie1,2; Feng，Yu1,3; Liang，Lili4; He，Xinyue1,5; Zeng，Zhenzhong1

2022-07-01

10.1016/j.agwat.2022.107706

AGRICULTURAL WATER MANAGEMENT   影响因子和分区

0378-3774

1873-2283

Crop water use (also know as evapotranspiraton, ET) monitoring is vital for agricultural management under the threat of water scarcity and global warming, as well as the pressure of increasing food demand. The ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) has provided valuable high-resolution ET estimates since its launch in 2018. Yet, evaluation of its capability in monitoring ET in the agricultural field is lacking, as well as the intercomparison of the two ECOSTRESS ET products calculated through different algorithms (PT-JPL vs. DisALEXI). This study focused on the agroecosystems and compared the ECOSTRESS ET to eddy covariance observations at 15 cropland flux sites in North America from July 2018 to December 2020. It is found that PT-JPL captured the diurnal pattern but tended to overestimate instantaneous ET in the morning. Besides, intercomparison of the magnitude, seasonal pattern and the dependency on crop phenology of ET from PT-JPL and DisALEXI revealed the higher fidelity of DisALEXI. The site-specific validations and visual comparisons with MODIS ET retrievals demonstrated the capability of PT-JPL and DisALEXI in identifying crop types and agricultural management practices to some extent. The heterogeneity of ET values in the small-scale agroecosystems highlights the importance of accurate representation of local conditions in the ET model.

AmeriFlux Crop Crop water use DisALEXI Eddy covariance PT-JPL Remote sensing

SCI ; EI

英语

第一 ; 通讯

Southern University of Science and Technology[29/Y01296122];National Natural Science Foundation of China[42071022];

Agriculture ; Water Resources

Agronomy ; Water Resources

WOS:000805952000003

ELSEVIER

20222112131340

Ecosystems ; Evapotranspiration ; Global warming ; Petroleum reservoir evaluation ; Radiometers ; Remote sensing ; Space stations ; Water supply

Atmospheric Properties:443.1 ; Water Supply Systems:446.1 ; Ecology and Ecosystems:454.3 ; Petroleum Deposits : Development Operations:512.1.2 ; Space Flight:656.1 ; Agricultural Products:821.4 ; Radiation Measuring Instruments:944.7

AGRICULTURAL SCIENCES

2-s2.0-85130098649

Scopus

1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Geoscience and Natural Resource Management,University of Copenhagen,Copenhagen,Denmark
3.Department of Civil Engineering,The University of Hong Kong,Hong Kong
4.College of Resources and Environment,Huazhong Agricultural University,Wuhan,China
5.School of Earth and Environment,University of Leeds,Leeds,UK,United Kingdom

Wu，Jie,Feng，Yu,Liang，Lili,et al. Assessing evapotranspiration observed from ECOSTRESS using flux measurements in agroecosystems[J]. AGRICULTURAL WATER MANAGEMENT,2022,269.

Wu，Jie,Feng，Yu,Liang，Lili,He，Xinyue,&Zeng，Zhenzhong.(2022).Assessing evapotranspiration observed from ECOSTRESS using flux measurements in agroecosystems.AGRICULTURAL WATER MANAGEMENT,269.

Wu，Jie,et al."Assessing evapotranspiration observed from ECOSTRESS using flux measurements in agroecosystems".AGRICULTURAL WATER MANAGEMENT 269(2022).