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Announcements
- September 12, 2003
August 2003 CMAQ Model Release
August 2003 release of the CMAQ model
Performance Evaluation for the August 2003 Release of CMAQ
- June 27, 2003
Forecasting Air Quality over the United
States
Increased awareness of national air quality issues on the part of the media and
the general public have recently led to more demand for short-term (1-2 day) air
quality forecasts for use in assessing potential health impacts (e.g., on
children, the elderly, and asthmatics) and potential mitigation actions in local
communities (e.g., increased use of carpools and mass transit, decreased
industrial operations).
- June 19, 2003
EPA and NOAA Join Forces to Conduct Atmospheric Modeling
Research and Produce Air Quality Forecasts
The two agencies will join forces to enhance research in air quality modeling
and atmospheric measurements for developing a consistent national numerical air quality model for
short-term air quality forecasts for ozone, fine particulate matter, and visibility.
- May 10, 2003
The CMAS Center in cooperation with EPA Office of Research and Development is
pleased to announce an interim release of CMAQ version 4.2. Version 4.2.2 is an
update to CMAQ version 4.2, originally released in July,2002. It is anticipated
that a full release of a new version of CMAQ will be available during the summer
of 2003.This latest release of CMAQ can be downloaded from the CMAS website
under the Model Clearinghouse in the Services
section of the site.
- December 3, 2002
As part of the June 2002 release of the EPA’s Community Multiscale
Air Quality model, a preliminary evaluation was performed involving
numerous model configurations, resolutions and domains. The
evaluation, which covered a two week period of July 1 - 14, 1999,
utilized ambient air concentration data of nine species (O3,
SO2, NO3-, HNO3, PM2.5,
EC, OC, SO4-, and NH4+)
obtained from three nationwide networks: AIRS, CASTNet and IMPROVE.
Download a copy of the abstract and the presentation below.
- November 4, 2002
All available CMAS conference abstracts and
presentations
are now on-line at www.cmascenter.org.
-
August 27, 2002
The new CMAS web site Models-3/CMAQ Support functions are
now in operation. The site includes documentation, bulletin boards, FAQs, and
e-mail support and bug tracking for CMAQ, SMOKE, IOAPI, PAVE, and MCOUPLE.
Support questions should no longer be directed to the EPA Models-3 Help Desk.
The CMAS web site is located at Community Modeling and Analysis Systems (CMAS).
- 7/19/02
Models-3/CMAQ workshop
The Models-3/CMAQ workshop has been set for
October 21 - 23, 2002 at Environmental Protection Agency in Research Triangle Park,
NC for details visit Community Modeling and Analysis Systems (CMAS)
website.
- 7/16/02
SUN version of
Community Multiscale Air Quality
(CMAQ) is now available
A stand-alone SUN version of
the
Community Multiscale Air Quality
(CMAQ) modeling system is now available. This version includes a brief
tutorial, test scripts, and reference output data. With the addition of
a SUN version of CMAQ, separate directories have been established for
Linux and SUN. Files may be downloaded at
ftp://ftp.epa.gov/amd/stand_alone_models3/cmaq/.
- 7/16/02
The 27 June 2002 Linux version of
Community Multiscale Air Quality
(CMAQ) has been updated
A few minor errors have been corrected in the 27 June 2002 release of
Community Multiscale Air Quality
(CMAQ). An errata file as well as updated scripts and reference output
data can be downloaded at
ftp://ftp.epa.gov/amd/stand_alone_models3/cmaq/.
- 6/28/02
The latest stand-alone version of the Community Multiscale Air Quality
(CMAQ) modeling system is available for downloading at
ftp://ftp.epa.gov/amd/stand_alone_models3/cmaq/.
The scripts for this release have been tested on Linux (specifically, Redhat
Linux 2.1 with the Portland Group F90 compiler, pgf90 version 3.2).
This version of CMAQ features
several major changes:
1) Addition of a new aerosols module, aero3, which includes:
+ improved treatment for Secondary Organic Aerosol formation by
including
semivolatile compounds that partition between gas and aerosol phases,
+ updated process for Sulfate nucleation,
+ heterogeneous conversion of N2O5 to Nitric Acid,
+ the ISORROPIA model for thermodynamics.
2) Incorporation of aerosol emissions in the vertical diffusion process.
3) Change in the order of the time splitting science processes:
from chemistry -> clouds -> aerosols
to clouds -> chemistry -> aerosols
to provide a better linkage between gas-phase chemistry and aerosols.
4) Addition of the SAPRC-99 gas-phase mechanism.
5) Addition of the Modified Euler Backward Iterative (MEBI) solver for all
variants
of
CB4, SAPRC-99, and the RADM2-Carter-4-Product-Isoprene mechanisms.
6) Addition of a new vertical diffusion module, the Asymmetric Convective
Model
(ACM).
7) Change to dynamically allocate the horizontal grid for the chemistry
model (CCTM)
and the initial and boundary concentrations pre-processors
(ICON and BCON), thus
allowing one executable to run any horizontal
domain that CMAQ supports.
8) In conjunction with (7), CCTM now can window from meteorology and
emissions
datasets, so that runs on many subdomains can be executed
using
one dataset
that encompasses all those subdomains.
9) Addition of hour-averaging output option for any chemical species.
Please check this website regularly for future updates.
- 3/20/02
We are pleased to release the latest version of
Meteorology-Chemistry Interface Processor
(MCIP) Version 2 (MCIP2). MCIP2 is part of the U.S. Environmental Protection
Agency's Community Multiscale Air Quality (CMAQ) modeling system. MCIP2 is
an update to the existing release of MCIP. MCIP2 has a
README
file listed here.
- 11/27/01
We are pleased to release the
SMOKE Tool patch.
This file should replace the smoketool directory under the /home/models3/models directory.
This contains updates to the Tool, as well as utilities for
reverse gridding, a standalone I/O API conversion program, preparation of spatial surrogates
and adding or changing surrogate coverages. Also, the release notes for the patch, containing instructions for the above changes and utilities,
are available
- 8/8/01
We are pleased to release the SMOKE Tool emission data
pre-processor in a "stand-alone" (independent of the Models-3
framework) form. This version is identical to that within the Sun Unix
and PC NT framework versions of Models-3 , Version 4.1. It is
important to download and read the documentation report
SMOKE Tool for Models-3 Version 4.1: Structure and Operation
Documentation, before using SMOKE Tool.
SMOKE Tool requires that Arc Info Version 8 and SAS Version 8 both
be installed and available. Emission data are not included in this
download of SMOKE Tool. Standard emission inventory and related files
are available with the Models-3 framework releases are included. SMOKE
Tool must be installed within the same directory structure as is
required for Models-3, because the logic and environment variables
expect that structure. This is explained in the documentation. In
addition, for "stand alone" operation, it is important to read
Appendix A of the documentation. The Appendix addresses definition of
grid and gridded surrogates in "stand alone" mode. This is the
principal difference between running SMOKE Tool in Models-3 and
independently.
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