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A New Evapotranspiration Model Accounting for Advection and Its Validation during SMEX02
Joint Authors
Qi, Jianwei
Yang, Yongmin
Su, Hongbo
Zhang, Renhua
Wu, Jianjun
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-12
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Based on the crop water stress index (CWSI) concept, a new model was proposed to account for advection to estimate evapotranspiration.
Both local scale evaluation with sites observations and regional scale evaluation with a remote dataset from Landsat 7 ETM+ were carried out to assess the performance of this model.
Local scale evaluation indicates that this newly developed model can effectively characterize the daily variations of evapotranspiration and the predicted results show good agreement with the site observations.
For all the 6 corn sites, the coefficient of determination (R2) is 0.90 and the root mean square difference (RMSD) is 58.52W/m2.
For all the 6 soybean sites, the R2 and RMSD are 0.85 and 49.46W/m2, respectively.
Regional scale evaluation shows that the model can capture the spatial variations of evapotranspiration at the Landsat-based scale.
Clear spatial patterns were observed at the Landsat-based scale and are closely related to the dominant land covers, corn and soybean.
Furthermore, the surface resistance derived from instantaneous CWSI was applied to the Penman-Monteith equation to estimate daily evapotranspiration.
Overall, results indicate that this newly developed model is capable of estimating reliable surface heat fluxes using remotely sensed data.
American Psychological Association (APA)
Yang, Yongmin& Su, Hongbo& Zhang, Renhua& Wu, Jianjun& Qi, Jianwei. 2013. A New Evapotranspiration Model Accounting for Advection and Its Validation during SMEX02. Advances in Meteorology،Vol. 2013, no. 2013, pp.1-13.
https://search.emarefa.net/detail/BIM-468254
Modern Language Association (MLA)
Yang, Yongmin…[et al.]. A New Evapotranspiration Model Accounting for Advection and Its Validation during SMEX02. Advances in Meteorology No. 2013 (2013), pp.1-13.
https://search.emarefa.net/detail/BIM-468254
American Medical Association (AMA)
Yang, Yongmin& Su, Hongbo& Zhang, Renhua& Wu, Jianjun& Qi, Jianwei. A New Evapotranspiration Model Accounting for Advection and Its Validation during SMEX02. Advances in Meteorology. 2013. Vol. 2013, no. 2013, pp.1-13.
https://search.emarefa.net/detail/BIM-468254
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-468254