ECOSTRESS and CIMIS: A Comparison of Potential and Reference Evapotranspiration in Riverside County, California
The ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) provides remotely-sensed estimates of evapotranspiration at 70 m spatial resolution every 1–5 days, sampling across the diurnal cycle. This study, in partnership with an operational water management organization, the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/12/24/4126 |
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| author | Gurjot Kohli Christine M. Lee Joshua B. Fisher Gregory Halverson Evan Variano Yufang Jin Daniel Carney Brenton A. Wilder Alicia M. Kinoshita |
| author_facet | Gurjot Kohli Christine M. Lee Joshua B. Fisher Gregory Halverson Evan Variano Yufang Jin Daniel Carney Brenton A. Wilder Alicia M. Kinoshita |
| author_sort | Gurjot Kohli |
| collection | DOAJ |
| description | The ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) provides remotely-sensed estimates of evapotranspiration at 70 m spatial resolution every 1–5 days, sampling across the diurnal cycle. This study, in partnership with an operational water management organization, the Eastern Municipal Water District (EMWD) in Southern California, was conducted to evaluate estimates of evapotranspiration under ideal conditions where water is not limited. EMWD regularly uses a ground-based network of reference evapotranspiration (<i>ET<sub>o</sub></i>) from the California Irrigation Management Information System (CIMIS); yet, there are gaps in spatial coverage and questions of spatial representativeness and consistency. Space-based potential evapotranspiration (PET) estimates, such as those from ECOSTRESS, provide consistent spatial coverage. We compared ECOSTRESS <i>ET<sub>o</sub></i> (estimated from PET) to CIMIS <i>ET<sub>o</sub></i> at five CIMIS sites in Riverside County, California from July 2018–June 2020. We found strong correlations between CIMIS <i>ET<sub>o</sub></i> and ECOSTRESS <i>ET<sub>o</sub></i> across all five sites (R<sup>2</sup> = 0.89, root mean square error (RMSE) = 0.11 mm hr<sup>−1</sup>). Both CIMIS and ECOSTRESS <i>ET<sub>o</sub></i> captured similar seasonal patterns through the study period as well as diurnal variability. There were site-specific differences in the relationship between ECOSTRESS AND CIMIS, in part due to spatial heterogeneity around the station site. Consequently, careful examination of landscapes surrounding CIMIS sites must be considered in future comparisons. These results indicate that ECOSTRESS successfully retrieves PET that is comparable to ground-based reference ET, highlighting the potential for providing observation-driven guidance for irrigation management across spatial scales. |
| first_indexed | 2024-03-10T14:00:35Z |
| format | Article |
| id | doaj.art-f19fd2e96648411bbb50af4e12ada847 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T14:00:35Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-f19fd2e96648411bbb50af4e12ada8472023-11-21T01:15:37ZengMDPI AGRemote Sensing2072-42922020-12-011224412610.3390/rs12244126ECOSTRESS and CIMIS: A Comparison of Potential and Reference Evapotranspiration in Riverside County, CaliforniaGurjot Kohli0Christine M. Lee1Joshua B. Fisher2Gregory Halverson3Evan Variano4Yufang Jin5Daniel Carney6Brenton A. Wilder7Alicia M. Kinoshita8Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720-1710, USAJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USAJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USAJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USADepartment of Civil and Environmental Engineering, University of California, Berkeley, CA 94720-1710, USADepartment of Land, Air and Water Resources, University of California, Davis, CA 94720-1710, USAEastern Municipal Water District, Perris, CA 92570, USADepartment of Civil, Construction & Environmental Engineering, San Diego State University, San Diego, CA 92182-1326, USADepartment of Civil, Construction & Environmental Engineering, San Diego State University, San Diego, CA 92182-1326, USAThe ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) provides remotely-sensed estimates of evapotranspiration at 70 m spatial resolution every 1–5 days, sampling across the diurnal cycle. This study, in partnership with an operational water management organization, the Eastern Municipal Water District (EMWD) in Southern California, was conducted to evaluate estimates of evapotranspiration under ideal conditions where water is not limited. EMWD regularly uses a ground-based network of reference evapotranspiration (<i>ET<sub>o</sub></i>) from the California Irrigation Management Information System (CIMIS); yet, there are gaps in spatial coverage and questions of spatial representativeness and consistency. Space-based potential evapotranspiration (PET) estimates, such as those from ECOSTRESS, provide consistent spatial coverage. We compared ECOSTRESS <i>ET<sub>o</sub></i> (estimated from PET) to CIMIS <i>ET<sub>o</sub></i> at five CIMIS sites in Riverside County, California from July 2018–June 2020. We found strong correlations between CIMIS <i>ET<sub>o</sub></i> and ECOSTRESS <i>ET<sub>o</sub></i> across all five sites (R<sup>2</sup> = 0.89, root mean square error (RMSE) = 0.11 mm hr<sup>−1</sup>). Both CIMIS and ECOSTRESS <i>ET<sub>o</sub></i> captured similar seasonal patterns through the study period as well as diurnal variability. There were site-specific differences in the relationship between ECOSTRESS AND CIMIS, in part due to spatial heterogeneity around the station site. Consequently, careful examination of landscapes surrounding CIMIS sites must be considered in future comparisons. These results indicate that ECOSTRESS successfully retrieves PET that is comparable to ground-based reference ET, highlighting the potential for providing observation-driven guidance for irrigation management across spatial scales.https://www.mdpi.com/2072-4292/12/24/4126ECOSTRESSCIMISpotential evapotranspirationreference evapotranspirationwater useCalifornia |
| spellingShingle | Gurjot Kohli Christine M. Lee Joshua B. Fisher Gregory Halverson Evan Variano Yufang Jin Daniel Carney Brenton A. Wilder Alicia M. Kinoshita ECOSTRESS and CIMIS: A Comparison of Potential and Reference Evapotranspiration in Riverside County, California Remote Sensing ECOSTRESS CIMIS potential evapotranspiration reference evapotranspiration water use California |
| title | ECOSTRESS and CIMIS: A Comparison of Potential and Reference Evapotranspiration in Riverside County, California |
| title_full | ECOSTRESS and CIMIS: A Comparison of Potential and Reference Evapotranspiration in Riverside County, California |
| title_fullStr | ECOSTRESS and CIMIS: A Comparison of Potential and Reference Evapotranspiration in Riverside County, California |
| title_full_unstemmed | ECOSTRESS and CIMIS: A Comparison of Potential and Reference Evapotranspiration in Riverside County, California |
| title_short | ECOSTRESS and CIMIS: A Comparison of Potential and Reference Evapotranspiration in Riverside County, California |
| title_sort | ecostress and cimis a comparison of potential and reference evapotranspiration in riverside county california |
| topic | ECOSTRESS CIMIS potential evapotranspiration reference evapotranspiration water use California |
| url | https://www.mdpi.com/2072-4292/12/24/4126 |
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