The IWDW provides access to meteorological modeling for the 2014 calendar year. WAQS AQ models will use WRF meteorology processed for specific PGM AQ models as meteorology inputs. This
page also provides information on the GEOS-Chem global chemical tracer model, which will be used to obtain chemistry parameters at the boundaries of the WAQS modeling domain. Finally, an overview
of WRF-Chem is provided because this model is being considered for future AQ modeling. Requests for the WRF and GEOS-Chem data files can be made on the IWDW
- WAQS 2014 WRF
- EPA 2014 WRF
The WAQS contracted UNC Chapel Hill to simulate 2014 meteorology using the Weather Research Forecast (WRF Version 3.6.1) Advanced Research WRF (WRF-ARW, or WRF) for the
2014 calendar year with a 36 km continental U.S. (CONUS), 12 km western U.S. (WESTUS), and 4 km western state domain (WSD). More information on WAQS 2014 meteorological modeling is provided
in the WAQS WRF 2014 MPE Document
EPA contracted UNC Chappel Hill to simulate 2014 meteorology using the Weather Research and Forecasting model (WRF Version 3.8) at a 12-km horizontal resolution for the continental United States (CONUS).
The WRF meteorological fields were processed using the Meteorology Chemistry Interface Process (MCIP) to generate Community Multiscale Air Quality (CMAQ)-ready input files.
Additionally, the 2014 WRF meteorological fields were processed using the Mesoscale Model Interface Tool (MMIF) to generate input files for dispersion models.
EPA WRF 2014 MPE Document
GEOS-Chem is a global 3-D chemical transport model (CTM) for atmospheric composition driven by meteorological input from the Goddard Earth Observing System (GEOS).
2014 WAQS AQ modeling will use GEOS-Chem output for estimating boundary conditions. EPA's 2014 GEOS-Chem output are available on the IWDW.
WRF-Chem is the Weather Research and Forecasting (WRF) model coupled with Chemistry. The model simulates the emission, transport, mixing, and chemical transformation of trace
gases and aerosols simultaneously with the meteorology. The model is used for investigation of regional-scale air quality, field program analysis, and cloud-scale interactions
between clouds and chemistry.
- Get MCIP files for EPA WRF 2014
- Get GEOS-Chem documentation