Science Inventory

MODEL DEVELOPMENT FOR FY08 CMAQ RELEASE

Impact/Purpose:

The objectives of this task are to continue development and improvement of EPA's mesoscale (regional through urban scale) air quality modeling systems, such as the Community Multiscale Air Quality (CMAQ) model, as air quality management and NAAQS implementation tools. This task focuses on needed research and development of air quality models targeted for a major CMAQ model release in FY08. Model development for a broad scope of application is envisioned. For example, CMAQ will need to be able to simulate air quality feedbacks to meteorology and climate as well as intercontinental transport. The 2008 release of CMAQ is timed to coincide with EPA/OAR's and the states' needs for an improved model for assessments of progress (mid-course corrections) in the post-SIP submittal timeframe.

Description:

This task provides credible state of the art air quality models and guidance for use in implementation of National Ambient Air Quality Standards for ozone and PM. This research effort is to develop and improve air quality models, such as the Community Multiscale Air Quality (CMAQ) modeling system, a multiscale and multi-pollutant chemistry-transport model (CTM). Specific research components include: meteorological modeling, land-surface and PBL modeling, gas phase mechanisms and solvers, cloud dynamics and aqueous chemistry, photolysis rates and radiative transfer model improvements, aerosol modeling, transport and diffusion, plume-in-grid approach, CMAQ code integration and efficiencies, and on-line integration of meteorology and atmospheric chemistry. Annual CMAQ modeling system releases are anticipated from this Task, incorporating new modeling science developments and modeling efficiencies each year, leading to a major CMAQ model system release in 2008. This task utilizes high performance computing and scientific visualization resources provided by EPA's National Environmental Scientific Computing Center (NESC2).

Record Details:

Record Type: PROJECT
Start Date: 10/01/2004
Projected Completion Date: 09/01/2008
OMB Category: Other
Record ID: 113784

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL EXPOSURE RESEARCH LABORATORY

ATMOSPHERIC MODELING DIVISION

ATMOSPHERIC MODEL DEVELOPMENT BRANCH