Satellites help map soil carbon flux

Mar 25, 2008

Changes in soil carbon occur with changes in land management. Scientists at Oak Ridge National Laboratory and The University of Tennessee investigated quantifying soil carbon changes over large regions.

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. Results of the study were published in the March issue of the Soil Science Society of America Journal and were also presented at the NASA Joint Workshop on Biodiversity, Terrestrial Ecology, and Related Applied Sciences in August 2006.

Tris West, project leader, stated, “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. The study is a proof-of-concept that illustrates the ability to model carbon dynamics associated with actual crop fields for entire regions or continents. The spatially-explicit carbon accounting framework is currently limited by the temporal and spatial extent of current remote sensing products. 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.

The full article is available for no charge for 30 days following the date of this summary. View the abstract at: soil.scijournals.org/cgi/content/full/72/2/285

Source: American Society of Agronomy

Explore further: Quakes destroy or damage 83 houses in Philippines

add to favorites email to friend print save as pdf

Related Stories

Peru's carbon quantified: Economic and conservation boon

Jul 30, 2014

Today scientists unveiled the first high-resolution map of the carbon stocks stored on land throughout the entire country of Perú. The new and improved methodology used to make the map marks a sea change ...

Biomarkers of the deep

Jul 25, 2014

Tucked away in the southwest corner of Spain is a unique geological site that has fascinated astrobiologists for decades. The Iberian Pyrite Belt (IPB) in Spain's Río Tinto area is the largest known deposit ...

Recommended for you

Kiribati leader visits Arctic on climate mission

14 hours ago

Fearing that his Pacific island nation could be swallowed by a rising ocean, the president of Kiribati says a visit to the melting Arctic has helped him appreciate the scale of the threat.

NASA catches a weaker Edouard, headed toward Azores

Sep 19, 2014

NASA's Aqua satellite passed over the Atlantic Ocean and captured a picture of Tropical Storm Edouard as it continues to weaken. The National Hurricane Center expects Edouard to affect the western Azores ...

User comments : 0