Search results for "Nir reflectance"

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Radiance-based NIRv as a proxy for GPP of corn and soybean

2020

Abstract Substantial uncertainty exists in daily and sub-daily gross primary production (GPP) estimation, which dampens accurate monitoring of the global carbon cycle. Here we find that near-infrared radiance of vegetation (NIRv,Rad), defined as the product of observed NIR radiance and normalized difference vegetation index, can accurately estimate corn and soybean GPP at daily and half-hourly time scales, benchmarked with multi-year tower-based GPP at three sites with different environmental and irrigation conditions. Overall, NIRv,Rad explains 84% and 78% variations of half-hourly GPP for corn and soybean, respectively, outperforming NIR reflectance of vegetation (NIRv,Ref), enhanced vege…

010504 meteorology & atmospheric sciencesRenewable Energy Sustainability and the EnvironmentPublic Health Environmental and Occupational HealthPrimary productionEnhanced vegetation index010501 environmental sciencesAtmospheric sciences01 natural sciencesNormalized Difference Vegetation IndexCarbon cycleNir reflectanceLinear relationshipPhotosynthetically active radiationRadianceEnvironmental science0105 earth and related environmental sciencesGeneral Environmental ScienceEnvironmental Research Letters
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