HR: 1340h
AN: H13C-0426    [Abstracts]
TI: Relation between satellite-derived vegetation indices, surface temperature and vegetation water content
AU: * Hong, S
EM: shong@geol.sc.edu
AF: Department of Geological Science, University of South Carolina, Columbia, 701 Sumter St. EWS 617, Columbia, SC 29201 United States
AU: Lakshmi, V
EM: venkat-lakshmi@sc.edu
AF: Department of Geological Science, University of South Carolina, Columbia, 701 Sumter St. EWS 617, Columbia, SC 29201 United States
AU: Njoku, E G
EM: eni.g.njoku@jpl.nasa.gov
AF: Jet Propulsion Laboratory, M/S 300-233, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Small, E
EM: eric.small@colorado.edu
AF: Department of Geological Sciences, University of Colorado, Boulder, 2200 Colorado Ave. Campus Box 399, Boulder, CO 80309 United States
AU: Gutmann, E
EM: Ethan.Gutmann@colorado.edu
AF: Department of Geological Sciences, University of Colorado, Boulder, 2200 Colorado Ave. Campus Box 399, Boulder, CO 80309 United States
AB: Vegetation and its relation to other climatic variables are very important to understand complex land-atmosphere interactions, which significantly influence climate. In this paper we study the relationship 1) between the surface temperature(Ts) and the normalized difference vegetation index(NDVI), and 2) between NDVI and vegetation water content(VWC) from the remotely sensed data. The monthly TIROS (Television Infrared Observation Satellite) Operational Vertical Sounder(TOVS) dataset and NOAA Advanced Very High Resolution Radiometer(AVHRR) dataset are examined for the relationship between Ts and NDVI respectively for the year 1985 - 1992. This relationship is described in the TvX plots, whose geometry explains the interrelationship between Ts, vegetation cover, and moisture availability. The study areas for this research are the North American Monsoon System (NAMS) (latitude : -120W to -85W, longitude : 10N to 50N) and the international H2O project(IHOP) area (latitude : -115W to -95W, longitude : 32N to 41N). The relationship between vegetation cover and moisture availability evaluates this TvX relationship. In the second part of this research, the daily Moderate-resolution Imaging Spectroradiometer (MODIS) data set and the 2-day Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) data set from March to September 2004 are studied for NDVI and VWC respectively at continental scale. Comparison of these two data sets shows that NDVI and VWC are generally related to each other in most continental scale watersheds.
DE: 3360 Remote sensing
DE: 1719 Hydrology
DE: 1866 Soil moisture
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting