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USA-NPN: Linking Land Surface and Remote Sensing Observations
Land surface phenology, coupled with USA-NPN ground-based observations, provide a potential to progress from plant-specific estimates to characterizing land surface phenology on a wall-to-wall national scale. But scaling from point observations to the landscape scale is a challenging research area. The required set of in situ measurements is presently not well-defined and conventional field measurements consist of species-specific observations of canopy properties, which are not sufficient for characterizing land surface phenology. Coupling USA-NPN observations with cooperating ecological networks (e.g., LTER, Ameriflux, National Park Service) provides a valuable opportunity for connecting ground observations to the landscape scale, provided specialized observation strategies are followed.