Monthly NASA-CASA model estimates of NO emissions from soils were simulated for a nine-state
region of the southeastern USA, as part of the Southern Oxidants Study (SOS). Simulations used a
regional geographic information system (GIS) as the data source for climate drivers, satellite
images, land cover, and soil properties over a 8-km grid resolution. The simulated emissions were
used to place the relative magnitude of soil NO emissions into perspective with other regional
sources of NOx, and to examine spatial and temporal patterns of soil NO emissions across the
- Fertilized soil sources of NO predicted by the model were large enough to
have an adverse impact on local air quality in rural areas.
- Model estimates of NO emission rates from farmed and forest soils were
consistent with measured emission rates.
Davidson, E. A., C. S. Potter, S. A. Klooster, and P. Schlesinger. 1998. Model estimates of regional nitric oxide emissions from soils of the southeastern United States. Ecological Applications. 8:748-759.
Soil NO emission estimated at 8-km cell resolution by the NASA-CASA model for the nine-state SOS
region of the southeastern USA.
Soil NO emission
Produced in collaboration with E. Davidson (Woods Hole Research Center),
with grant support from the Southern Oxidants Study.