WHAT THE EVIDENCE SAYS
A Tools of the Trade article outlines how satellite-derived products can be used to estimate and compare surface soil-moisture dynamics over regional to global scales, extending observation beyond sparse in-situ networks.
WHY IT MATTERS / OUR READ
The management value is scale: soil moisture links rainfall to plant stress, runoff and fire or drought conditions, so spatially consistent observations can help place local measurements in a broader landscape context.
CAVEATS / UNCERTAINTY
This is a technical overview rather than a new validation experiment. Satellite products differ in sensing depth, spatial and temporal resolution, vegetation sensitivity and retrieval error, so they should not be treated as interchangeable with field measurements.
SOURCE
Nature Reviews Earth & Environment — Tools of the Trade
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