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Linking Terrestrial Biosphere Models with Imaging Spectrometry Measurements of Ecosystem Composition, Structure, and Function
Paul
R.
Moorcroft, Harvard University, paul_moorcroft@harvard.edu
(Presenter)
Alexander
Antonarakis, Harvard University, aantonarakis@oeb.harvard.edu
Glynn
Hulley, Jet Propulsion Laboratory, glynn.hulley@jpl.nasa.gov
Above-ground ecosystem composition is a key determinant of the current and future biophysical and biogeochemical functioning of terrestrial ecosystems, including their carbon balance, and the exchange of water and energy between the land-surface and the atmosphere. Information on ecosystem composition has traditionally come from ground-based inventories that provide detailed information on the composition and structure of the plant canopy in specific areas. However, ground-based inventories are limited in their spatial extent, and thus do not provide a comprehensive picture of the current state of the above ground ecosystem at regional and global scales.
In this study, we examine how AVIRIS Classic and MASTER imaging spectrometry, and future instruments such as HyspIRI, AVIRISng and HyTES, can be used to provide accurate, and comprehensive measurements of current ecosystem state -- specifically plant functional composition, and canopy and soil temperatures -- that can be used to constrain terrestrial biosphere model predictions of the current and future carbon, water and energy fluxes of the land surface. This is achieved by linking remotely-sensed imaging spectrometry-derived estimates of ecosystem composition and canopy temperatures for the diverse range of terrestrial ecosystems found in California, to the definition of above ground ecosystem in ED2, a state-of-the-art process-based terrestrial biosphere model. The first ecosystem being evaluated is the Tonzi Ranch Oak Savanna in Central California. The AVIRIS- derived information on the current composition the ecosystem are being used to constrain and improve the model’s predictions for the current carbon, water and energy balance of the ecosystem that will be assessed against the long-term flux tower observations available at this site.
Presentation Type: Poster
Session: Poster Session 2-B
(Wed 4:30 PM)
Associated Project(s):
Poster Location ID: 68
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