Atmospheric Land Exchange (ALEX)

Image shows the latent heat flux 5.5 hours after local sunrise as obtained from the ALEX model at 10 km horizontal resolution over a domain covering the central United States.

Satellite page

Overview

Our investigative efforts have been to evaluate the surface energy balance over the domain of the SGP-97 experiment via a "two-source" Atmosphere-Land EXchange (ALEX) model. This model is comprised of a surface component (describing the relationship between radiometric temperature, sensible heat flux and the temperature of the air, plant canopy and soil surface), coupled with a time-integrated component (connecting the time-integrated surface sensible heat flux with planetary boundary layer development). The only required data inputs for this model are radiometric temperature (from GOES satellite), analyzed surface and upper air synoptic data, and vegetation cover estimates from (AVHRR) satellite sources.

Data Access and Contacts

FTP Site

The SSM/I data is in the following GES DISC ftp site:

ALEX image

Points of Contact

The Principal Investigator for ALEX is Dr. George Diak of the University of Wisconsin. For information about this data contact John Mecikalski Cooperative Institute for Meteorological Satellite Studies and Department of Soil Sciences University of Wisconsin, Madison E-mail: johnm@ssec.wisc.edu Voice: 608-262-1023

For more information using SGP97 data from the GES DISC, contact: Hydrology Data Support Team Goddard Earth Sciences Data and Information Services Center (GES DISC) Code 610.2 NASA Goddard Space Flight Center Greenbelt, Maryland 20771 E-mail: hydrology-disc@listserv.gsfc.nasa.gov Vocie: 301-614-5165 Fax: 301-614-5268

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Last update:Fri Jan 15 14:23:52 EST 1999 Page Author: Hydrology Data Support Team -- hydrology-disc@listserv.gsfc.nasa.gov Web Curator: Stephen W Berrick NASA official: Steven Kempler, DAAC Manager -- Steven.J.Kempler@nasa.gov