Skip all navigation and jump to content Jump to site navigation
NASA Logo - Goddard Space Flight Center

+ NASA Homepage

    
Goddard Space Flight Center
About MODIS News Data Tools /images2 Science Team Science Team Science Team

   + Home
ABOUT MODIS
MODIS Publications Link
MODIS Presentations Link
MODIS Biographies Link
MODIS Science Team Meetings Link
 

 

 

Girolimetto, D; Venturini, V; Rodriguez, L (2011). The effect of the spatial resolution of NDVI-T(s) spaces on the evaporative fraction calculation. TECNOLOGIA Y CIENCIAS DEL AGUA, 2(3), 21-33.

Abstract
This paper analyzes the effect of the spatial resolution of the images used to generate the Normalized Difference Vegetation Index (NDVI)-surface temperature (T(s)) space. This is widely used to monitor environmental variables such as evapotranspiration (ET) and evaporative fraction (FE). The method proposed by Jiang and Islam (2001) was selected to study the effect of the spatial resolution on the calculation of the FE. For this, spatial resolutions were analyzed ranging from 1 x 1 km (common for thermal sensor images) to 10 x 10 km (consistent with images from passive microwave sensors (MP)). The results suggest that the NDVI-T(s) triangular space allows for obtaining reasonably accurate FE values with low spatial resolution, such as that of MP, provided that the cold edge can be determined using images with 1 x 1 km spatial resolution. If it is not possible to calculate the cold edge with images of 1 x 1 km resolution, the results would be uncertain and, therefore, should be carefully analyzed.

DOI:

ISSN:

FirstGov logo Privacy Policy and Important Notices NASA logo

Curator: Brandon Maccherone
NASA Official: Shannell Frazier

NASA Home Page Goddard Space Flight Center Home Page