dataset : SAFARI 2000 AVHRR-derived Land Surface Temperature Maps, Africa, 1995-2000

Oak Ridge National Laboratory Distributed Active Archive Center DAAC


SAFARI 2000 AVHRR-derived Land Surface Temperature Maps, Africa, 1995-2000

ABSTRACT: Land Surface Temperature (LST) is a key indicator of land surface states, and can provide information on surface-atmosphere heat and mass fluxes, vegetation water stress, and soil moisture. A daily, day and night, LST data set for continental Africa, including Madagascar, was derived from Advanced Very High Resolution Radiometer (AVHRR) Global Area Coverage (GAC; 4 km resolution) data for the 6-year lifetime of the NOAA-14 satellite (from 1995 to 2000) using a modified version of the Global Inventory Mapping and Monitoring System (GIMMS) (Tucker et al., 1994). The data were projected into Albers Equal Area and aggregated to 8 km spatial resolution. The data were cloud-filtered with CLAVR-1 algorithm (Stowe et al., 1999). The LST values were estimated with a split-window technique (Ulivieri et al., 1994) that takes advantage of differential absorption of the thermal infrared signal in bands 4 and 5. The emissivity of the surface was generated using a land cover classification map (Hansen et al., 2000) combined with the FAO soil map of Africa (FAO-UNESCO, 1977) and additional maps of tree, herbaceous, and bare soil percent cover (DeFries et al., 2000). Collateral products include cloud mask, time-of-scan, latitude and longitude, and land/water mask files.The data are in flat binary files. Each data file contains 1152 columns and 1152 rows, in signed integer format (2 bytes), with 8 km by 8 km spatial resolution. A unique map exists for each day and each night of the 6-year NOAA-14 lifetime. The data are best used to infer broad temporal and spatial trends rather than pixel-by-pixel values.


This dataset was released on January 01, 2006.

The time range for this dataset is January 01, 1995 to December 31, 2000.

The spatial range for this dataset is -42.24° to 43.71° latitude, and -24.6° to 64.52° longitude. map (center)

This dataset uses data from an instance of the advanced-very-high-resolution-radiometer-2 instrument on the national-oceanic-and-atmospheric-administration-14 platform.
DOI : 10.3334/ORNLDAAC/826
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