Soil Emissions Modeling
Emissions of reactive nitrogen compounds from soil are important, but potentially underestimated, contributors to atmospheric chemistry. In particular, some studies suggest soil emissions of NO may be twice as large as previous estimates; other studies suggest soils represent a previously unrecognized source of HONO. Our group has implemented into the Community Multiscale Air Quality (CMAQ) model a state-of-the-science soil NO emissions scheme, which significantly increases soil emissions and better represents their responsiveness to meteorology. We are investigating how this new scheme affects simulation of air pollutants and their sensitivities to emissions. Upcoming work may seek to further enhance model estimates of soil emissions to incorporate additional reactive nitrogen species, and to better characterize the impacts of changes in fertilizer applications.
Funding: NASA Air Quality Applied Sciences Team
Participants: Ben Lash