Washington, March 26 : Scientists at Oak Ridge National Laboratory and the University of Tennessee have integrated soil science data with remote sensing through satellites to report soil carbon flux resulting from land management changes.
For the analysis, they integrated remote sensing products with a national carbon accounting framework in a project funded by the U.S. National Aeronautics and Space Administration, Office of Earth Science.
According to Tris West, project leader, "The use of remote sensing products allows for the identification of soil and environmental attributes that are associated with each unique combination of planted crop and associated management inputs at the sub-county scale."
The 1992 National Land Cover Data, based on Landsat TM remote sensing data, was initially used in the carbon accounting framework.
The use of these data allowed for estimated changes in soil carbon flux to be delineated at a 30-meter resolution across four land-use categories: row crops, small grains, pasture/hay, and fallow.
The spatially-resolved results can also be used for comparison to other site specific measurements, such as measurements from eddy flux towers and atmospheric transport models, currently being developed under the multi-agency North American Carbon Program.
The study resulted in the integration of remote sensing with soil science and agricultural economics, which was used to predict future land use. It is also a proof-of-concept that illustrates the ability to model carbon dynamics associated with actual crop fields for entire regions or continents.
Future work includes the integration of land-use data sets based on MODIS and the Indian Remote Sensing satellite.
Through the integration of inventory data and remote sensing data, the scientists expect to make enhanced land management data sets available to the scientific community in the near future.