A spatial downscaling procedure of MODIS derived actual evapotranspiration using Landsat images at central Greece

M. Spiliotopoulos; N. Adaktylou; A. Loukas; H. Michalopoulou; N. Mylopoulos; L. Toulios

doi:10.1117/12.2027536

5 August 2013 A spatial downscaling procedure of MODIS derived actual evapotranspiration using Landsat images at central Greece

M. Spiliotopoulos, N. Adaktylou, A. Loukas, H. Michalopoulou, N. Mylopoulos, L. Toulios

Author Affiliations +

Proceedings Volume 8795, First International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2013); 879508 (2013) https://doi.org/10.1117/12.2027536
Event: First International Conference on Remote Sensing and Geoinformation of Environment, 2013, Paphos, Cyprus

Abstract

In this study, the Surface Energy Balance Algorithm for Land (SEBAL) was used to derive daily actual evapotranspiration (ET_a) distributions from Landsat and MODIS images separately. The study area is the Lake Karla basin in Thessaly, Central Greece. Meteorological data from the archive of Center for Research and Technology, Thessaly (CERETETH) have also been used. The methodology was developed using satellite and ground data for the period of summer 2007. Landsat and MODIS imagery were combined in order to have data with high temporal and spatial resolution (downscaling). The downscaling technique applied is the output downscaling with regression between images. This technique disaggregates imagery by applying linear regression between two MODIS products to the previous or subsequent Landsat product. After the calculation of a first order linear regression between two MODIS-derived ET_a maps the next step is the regression to the ET_a map derived from the prior Landsat image to predict the disaggregated subsequent Landsat ET_a map. The results are satisfactory, giving the general trend of ET_a derived from the original SEBAL procedure.

Citation Download Citation

M. Spiliotopoulos, N. Adaktylou, A. Loukas, H. Michalopoulou, N. Mylopoulos, and L. Toulios "A spatial downscaling procedure of MODIS derived actual evapotranspiration using Landsat images at central Greece ", Proc. SPIE 8795, First International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2013), 879508 (5 August 2013); https://doi.org/10.1117/12.2027536

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available