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dataset : SAFARI 2000 AVHRR-derived Land Surface Temperature Maps, Africa, 1995-2000
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.daac.ornl.gov
Identified by : S2K_RS_AVHRRLST_IMAGERY
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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