This model product contains the source code for the updated Berkeley-Dalhousie Soil NOx Parameterization (BDSNP) module implementation with the Community Multiscale Air Quality (CMAQ) model. The update incorporates dynamic representation of the soil nitrogen pool on a day to day basis from the Environmental Policy Integrated Climate (EPIC) biogeochemical model. Sample input data and three sets of model outputs covering the conterminous United States are included with this data set. The three sets of outputs represent three different applications of the CMAQ as described in Rasool et al. (2016). The BDSNP module helps to improve the timing and spatial distribution of estimates of soil nitric oxide (NO) emissions through parameterization of soils, meteorology, land use, and mineral nitrogen availability from both fertilization and deposition. The simulations use a 12 km spatial grid resolution for CMAQ modeling for July 2011.

This dataset is associated with the following publication: Rasool, Q., R. Zhang, B. Lash, D. Cohan, E. Cooter, J. Bash, and L. Lamsal. Enhanced representation of soil NO emissions in the Community Multiscale Air Quality (CMAQ) model version 5.0.2. Geoscientific Model Development. Copernicus Publications, Katlenburg-Lindau, GERMANY, 9: 3177-3197, (2016).