CMAS Webinar from June 25, 2024 from Patrick Campbell, George Mason University.

Here we describe the novel NOAAEPA AtmosphereChemistry Coupler (NACC) in the cloud ("NACCCloud") product (https://nacc.arl.noaa.gov/nacc/). NACCCloud ondemand processes NOAA's operational Global Forecast System version 16 (GFSv16) data, and outputs modelready meteorological files needed for the widely used Community Multiscale Air Quality (CMAQ) model for any regional domain in the world. NACC is adapted from the U.S. EPA's MeteorologyChemistry Interface Processor version 5 (MCIPv5), and was used as the primary model coupler for the operational National Air Quality Forecasting Capability (NAQFC). NACCCloud provides a webbased interface that can readily be used in the air quality modeling community for GFSdriven CMAQ applications. All of the NACCCloud development is based on the Amazon Web Services (AWS)High Performance Computing (HPC) platform, specifically the AWS ParallelCluster v3.0. The main topics described in our presentation include 1) background on the GFSv16 and NACC software, 2) AWSHPC environment and GFSv16 data in the cloud, 3) development and demonstration of the NACCCloud interface for the community, 4) examples of current applications of NACCCloud, and 5) future opportunities.