Utility of HyspIRI high-resolution thermal imaging for water resource management and carbon flux mapping
Martha
C
Anderson, USDA-ARS, martha.anderson@ars.usda.gov
(Presenting)
William
P.
Kustas, USDA-ARS, bill.kustas@ars.usda.gov
Richard
G.
Allen, U-Idaho, rallen@kimberly.uidaho.edu
Thermal-infrared (TIR) remote sensing provides valuable information about vegetation stress and the soil moisture status, and therefore has great utility in mapping water and carbon assimilation fluxes at the landscape scale. State-of-the-art TIR-based surface energy balance models have demonstrated notable skill at assessing evapotranspiration and moisture stress over large areas, and are used operationally today to monitor consumptive water use in the U.S. and other countries. Recent model enhancements facilitate joint mapping of coupled transpiration and assimilation fluxes, using TIR-derived canopy temperature as an indicator of the bulk canopy conductance. For many resource management applications, thermal imaging at high spatial resolution (<100m), currently available from the Landsat satellites, has proven to be critical for resolving important landcover features: individual fields and irrigation pivots, canals and riparian riverways, reservoirs, and other man-made hydrologic structures. The high-resolution thermal imaging instrument on the proposed HyspIRI satellite mission is particularly well-suited for such monitoring applications, providing global TIR data at 45-m resolution and 5-day repeat cycle. Examples of potential applications of HyspIRI TIR data in water and carbon management are provided, along with an assessment of comparative utility of 1-km TIR data from the Moderate Resolution Imaging Spectroradiometer (MODIS).
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