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Combining Observations in the Reflective Solar and Thermal Domains for Improved Mapping of Carbon, Water and Energy FLuxesThis study investigates the utility of integrating remotely sensed estimates of leaf chlorophyll (C(sub ab)) into a thermal-based Two-Source Energy Balance (TSEB) model that estimates land-surface CO2 and energy fluxes using an analytical, light-use-efficiency (LUE) based model of canopy resistance. Day to day variations in nominal LUE (LUE(sub n)) were assessed for a corn crop field in Maryland U.S.A. through model calibration with CO2 flux tower observations. The optimized daily LUE(sub n) values were then compared to estimates of C(sub ab) integrated from gridded maps of chlorophyll content weighted over the tower flux source area. Changes in Cab exhibited a curvilinear relationship with corresponding changes in daily calibrated LUE(sub n) values derived from the tower flux data, and hourly water, energy and carbon flux estimation accuracies from TSEB were significantly improved when using C(sub ab) for delineating spatio-temporal variations in LUE(sub n). The results demonstrate the synergy between thermal infrared and shortwave reflective wavebands in producing valuable remote sensing data for monitoring of carbon and water fluxes.
Document ID
20110015258
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Houborg, Rasmus
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Anderson, Martha
(Department of Agriculture Beltsville, MD, United States)
Kustas, Bill
(Department of Agriculture Beltsville, MD, United States)
Rodell, Matthew
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 25, 2013
Publication Date
July 25, 2011
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
GSFC.CPR.4697.2011
Meeting Information
Meeting: 2010 30th IEEE International Geoscience and Remote Sensing Symposium
Location: Honolulu, HI
Country: United States
Start Date: July 25, 2010
End Date: July 30, 2010
Sponsors: Institute of Electrical and Electronics Engineers
Distribution Limits
Public
Copyright
Other

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