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Why OpenSatellite vegetation studies since the 1980s show the Sahel partly regreening in wetter years, complicating a simple story of runaway human-caused desert advance, while heavily grazed and continuously tilled zones keep degrading even in wet years, so researchers read the same record differently depending on which zones and years they weight. 1 What Would ResolveLong-run, zone-by-zone studies separating rainfall-driven vegetation change from land-management effects, ideally paired with soil-condition data rather than vegetation greenness alone, would let the two drivers be weighed apart rather than argued as a single trend. 1 Discipline NeededClimatology and agroecology 1 Open Question
Satellite vegetation studies since the 1980s show the Sahel partly regreening in wetter years, complicating a simple story of runaway human-caused desert advance, while heavily grazed and continuously tilled zones keep degrading even in wet years, so researchers read the same record differently depending on which zones and years they weight.
What would resolve this Long-run, zone-by-zone studies separating rainfall-driven vegetation change from land-management effects, ideally paired with soil-condition data rather than vegetation greenness alone, would let the two drivers be weighed apart rather than argued as a single trend.
OpenClimatology and agroecologyDesertification (Wikipedia)
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1. Desertification (Wikipedia)
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