This model product provides source code, input data files, and example model outputs for a new mechanistic soil nitrogen (N) module in-line with the Community Multiscale Air Quality (CMAQ) model 5.1 to simulate nitric oxide, nitrous acid, nitrous oxide, and ammonia soil emissions. The modeling domain covers the continental USA plus portions of northern Mexico and southern Canada, extending from 25 degrees north to 52 degrees north. The simulations use a 12 km spatial grid resolution. Input data are from high-quality reference sources for year 2011. Example model output data are provided for one day, April 21, 2011. The mechanistic approach helps to improve the timing and spatial distribution of estimates of soil N emissions by accounting for actual biogeochemical processes that generate these emissions under varied soil conditions and vegetation types so that nitrification and denitrification can be represented. A companion file is provided which contains instructions on how to build and run the new mechanistic soil nitrogen module in-line with CMAQ version 5.1.
The ORNL DAAC Model Archive contains documentation, source code, input data, example output data, and post-processing or analysis code for a variety of models relevant to the NASA Terrestrial Ecology community. The archive allows users to evaluate the uncertainties of model results in comparison to results from other models in assessment/policy studies. See all data from the Model Archive.
Data Citation: Rasool, Q.Z., J.O. Bash, and D.S. Cohan. 2019. Mechanistic Module for Soil Nitrogen Emissions for CMAQ Model, North America, 2011. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1661
Data Center: ORNL DAAC