You are here:
PHOTOCHEMICAL AND AEROSOL MODELING WITH THE CMAQ PLUME-IN-GRID APPROACH
Citation:
Binkowski, F S., D W. Byun, N. V. Gillani, G L. Gipson, AND J M. Godowitch. PHOTOCHEMICAL AND AEROSOL MODELING WITH THE CMAQ PLUME-IN-GRID APPROACH. Presented at 12th Joint Conference on the Applications of Air Pollution Meteorology with the Air & Waste Management Association, Norfolk, VA, May 20-24, 2002.
Impact/Purpose:
The objectives of this task are to continuously develop and improve the Community Multiscale Air Quality (CMAQ) modeling system, which is the science implementation within the Models-3 system framework for air quality simulation. CMAQ is a multiscale and multi-pollutant chemistry-transport model (CTM) that includes the necessary critical science process modules for atmospheric transport, deposition, cloud mixing, emissions, gas- and aqueous-phase chemical transformation processes, and aerosol dynamics and chemistry. It relies on Models-3 I/O API to support machine independent data access and maintains simple interfaces among science processor modules to provide a high-level of modularity.
Description:
Emissions of nitrogen oxides (NO) and/or sulfur oxides (SO) from individual point sources, such as coal-fired power plants, with tall stacks contribute to reduced air quality. These primary species are important precursors of various oxidant species and secondary fine particulate matter (PM 2.5). In an attempt to provide a more realistic modeling treatment of the dynamic and chemical processes governing pollutants in subgrid scale pollutant plumes emanating from major point sources within an Eulerian 3-D grid modeling framework, a plume-in-grid (PinG) approach was developed and incorporated into the one atmosphere, Community Multiscale Air Quality (CMAQ) modeling system (Byun et.al., 1998). The PinG technique was designed to spatially resolve pollutant plumes and to simulate their gradual growth downwind, which permits photochemical processes in plumes to evolve in a more realistic manner. This paper outline the photochemistry and recently installed aerosol model treatments contained in the CMAQ PinG. Selected results from initial test applications are presented, however, more material will be displayed in the conference poster.
This paper has been reviewed in accordance with the U.S. Environmental Protection Agency's peer and administrative review policies and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.