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The Advanced Air Quality Modeling System: The Global MPAS-CMAQ Model, NASA ROSES presentation
Citation:
Pleim, Jon, J. Willison, AND R. Gilliam. The Advanced Air Quality Modeling System: The Global MPAS-CMAQ Model, NASA ROSES presentation. NASA ROSES 17.A39 stakeholders Google meeting, Cary, NC, May 28, 2021.
Impact/Purpose:
Informal presentation to NASA ROSES stakeholders lead by University of Alabama in Huntsville
Description:
The USEPA has embarked on the Advanced Air Quality Modeling System (AAQMS) project to enable modeling of air quality from global to regional to local scales. The system will have three configurations: Global meteorology with seamless mesh refinement and online (coupled) atmospheric chemistry; Regional online meteorology and chemistry; and Offline regional meteorology and chemistry. The global configuration includes the Model for Prediction Across Scales – Atmosphere (MPAS-A) v7.0, developed at the National Center for Atmospheric Research (NCAR), coupled with the latest version of the Community Multiscale Air Quality (CMAQv5.3.2) model. We will show comprehensive evaluation of meteorology simulated by the EPA-enhanced version of MPAS-A that includes the addition of four-dimensional data assimilation, the ACM2 PBL model, PX land surface model, and enhanced Kain-Fritsch convection on two global meshes with refinement over North America. We will present our most recent testing and evaluation of air quality simulations by the coupled MPAS-CMAQ system. Global emissions from EDGAR-HTAP are combined with the 2016 EPA NEI for the U.S., supplemented by biogenic emissions provided by the inline Model of Emissions of Gases and Aerosols from Nature (MEGANv3.1). Global ozone fields from the Copernicus Atmosphere Monitoring Service (CAMS) are used for a “hot start” and for stratospheric ozone data assimilation in the upper layers of the model for the entire simulation.