HyspIRI and flux towers
Measurement of ecosystem metabolism across climatic and vegetation gradients in California for the 2013-2014 NASA AVIRIS/MASTER airborne campaign.
The HyspIRI project makes use of flux towers at several of its sites to assess the airborne hyperspectral data. Flux towers measure the exchange of carbon, water and energy between the ecosystem and the atmosphere by collecting instantaneous data on a given parameter and concurrent wind velocity, a process known as eddy covariance. This provides an understanding of the ecosystem processes taking place at the site across the footprint of the tower, covering several hundred square meters. The tower therefore helps to assess the scaling of measurements from the leaf level (ground based measurements) to the canopy level (airborne measurements), as the tower footprint covers the area equivalent to a couple pixels of airborne data. Products we derive from the flux data include Net Ecosystem Exchange (NEE), Gross Primary Productivity (GPP) and the maximum rate of carboxylation (Vcmax).
Collaborators