Journal
NEW PHYTOLOGIST
Volume 223, Issue 3, Pages 1166-1172Publisher
WILEY
DOI: 10.1111/nph.15808
Keywords
leaf water potential; microwave remote sensing; plant water content; radar; radiometry; relative water content; vegetation optical depth
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Although primarily valued for their suitability for oceanographic applications and soil moisture estimation, microwave remote sensing observations are also sensitive to plant water content (M-w). Since M-w depends on both plant water status and biomass, these observations have the potential to be useful for a range of plant drought response studies. In this paper, we introduce the principles behind microwave remote sensing observations to illustrate how they are sensitive to plant water content and discuss the relationship between landscape-scale M-w and common stand-scale metrics, including plant-scale relative water content, live fuel moisture content and leaf water potential. Lastly, we discuss how various sensor types can be leveraged for specific applications depending on the spatio-temporal resolution needed.
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