Comparison of MODIS derived Evapotranspiration with las measurements at Changwu agro-ecological experimental station

Author

Tang, Ronglin ; Zhu, Yuanjun ; Liu, Wenzhao ; Li, Zhao-Liang

Author_Institution

State Key Lab. of Resources & Environ. Inf. Syst., CAS, Beijing, China

fYear

2010

fDate

25-30 July 2010

Firstpage

1529

Lastpage

1532

Abstract

Significance of Evapotranspiration (ET) has been realized in disciplines of hydrology, meteorology and agriculture from a number of studies. A parameterization based on the spatially contextual information of surface temperature-vegetation index, namely T_s-VI triangle method, is applied to estimate regional ET from remotely sensed data acquired at the Changwu agro-ecological experiment station. Surface net radiation (R_n) is estimated also from MODIS/Terra products. Ratio of soil heat flux (G) to R_n is determined using a linear combination of G/R_n at bare soil and fully vegetated surface. Reasonably good agreement between estimated and measured sensible heart flux from Large Aperture Scintillometer is observed with RMSD about 48 W/m².

Keywords

agriculture; evaporation; remote sensing; transpiration; vegetation; Changwu agroecological experimental station; LAS measurement; MODIS derived evapotranspiration; agriculture; hydrology; meteorology; surface net radiation; surface temperature vegetation index; Estimation; Heating; Land surface; Land surface temperature; MODIS; Remote sensing; Temperature measurement; Evapotranspiration; Large Aperture Scintillometer; Validation; surface temperature-vegetation index;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International

Conference_Location

Honolulu, HI

ISSN

2153-6996

Print_ISBN

978-1-4244-9565-8

Electronic_ISBN

2153-6996

Type

conf

DOI

10.1109/IGARSS.2010.5652752

Filename

5652752