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Contact Us

Dr. Daniel Cohan
Associate Professor
Civil and Environmental Engineering
Rice University
6100 Main Street MS 519
Houston, TX 77005

Phone: 713-348-5129
Office: Keck Hall 116B
Email: cohan 'at' rice.edu

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