Suivi du développement végétal au cours de l'été 1984 dans le Sahel Malien
作者： P. H. Y. HIERNAUX , C. O. JUSTICE
DOI: 10.1080/01431168608948951
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摘要: Abstract A ground data-collection programme was initiated to establish a calibration between the normalized difference vegetation index (NDVI) from NOAA Advanced Very High Resolution Radiometer (AVHRR) and grassland biomass. Thirty sites were selected representing range of Sahclian communities in Gourma region Mali monitored during 1984 growing season. The 1 km square located within larger areas homogeneous terrain. herbaceous woody strata sampled every fourteen days, above-ground green biomass rainfall data collected. Ground airborne radiometer recorded facilitate interpretation satellite data, aerial photographs taken provide estimates tree shrub density. AVHRR LAC GAC acquired thermal cloud mask applied data. NDVI values extracted for correlation analysis performed. Low coefficients calculated meas...
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