Oak Ridge National Laboratory Distributed Active Archive Center

nasa-ornldaac-762

SAFARI 2000 MODIS Water and Heat Fluxes, Maun, Botswana, Dry Season 2001

ABSTRACT: A physically-based model, Energy: Surface Towards Atmosphere (ESTA), was used to model and map the energy and water balances of a heterogeneous land surface in a savanna environment on the southern fringe of the Okavango Delta, near Maun, Botswana. ESTA is governed by remotely sensed values of surface temperature, reflection, and vegetation density.Surface reflectance data from the MODIS sensor aboard the Terra satellite were obtained for the Okavango Delta region for September of 2001. Use was made of the visible, near infrared, and thermal bands of MOD09, a configuration that allows discrimination of broad-band surface albedo, vegetation indices, and surface temperature. A crude land cover classification image was created to provide vegetation canopy heights for the estimation of aerodynamic resistance. The original spatial resolution of the visible and near infrared imagery of 250 and 500 meters, respectively, was reduced to 1 km to be compatible with the resolution of the thermal imagery. Input to the model also includes near-surface meteorological observations from the Maun flux tower.Net radiometer data from the Maun station were used for crude atmospheric corrections and for validating net radiation estimates. Soil heat flux plates, also in place at the tower site, in combination with an eddy-correlation system, were used to validate the model output for soil and turbulent heat fluxes. This data set consists of 3 separate gridded binary image files representing daily evapotranspiration (mm/day) for the Okavango Delta region for September 2, September 13, and September 29, 2001.

daac.ornl.gov

http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=762

Identified by : s2k_modis_h2o_flux

This dataset was released on January 01, 2004.

The time range for this dataset is September 02, 2001 to September 29, 2001.

The spatial range for this dataset is -21.0004° to -17.9946° latitude, and 21.4946° to 24.5004° longitude. map (center)

This dataset uses data from an instance of the moderate-resolution-imaging-spectroradiometer instrument on the terra platform.
DOI : 10.3334/ORNLDAAC/762
Also known as :

• dataset oai:mercury-ops2.ornl.gov:ornldaac_762 (ornl lexicon)
• dataset oai:mercury.ornl.gov:ornldaac_762 (ornl lexicon)