Data Preparation
WRF model outputs are processed according to the requirements of the target dispersion modelling system.
For AERMOD applications, WRF data can be processed using the U.S. EPA Mesoscale Model Interface Program (MMIF) to generate model-ready meteorological files.
For CALMET and CALPUFF applications, WRF outputs can be processed using CALWRF or MMIF, depending on the required modelling configuration and data format.
Datasets can be prepared for project-specific locations, domains and modelling requirements.
Meteorological Data Services
Model-Ready Meteorological Data
Envitrans provides model-ready meteorological datasets for air dispersion modelling at locations worldwide. Data can be prepared for specific coordinates, modelling domains and project requirements, with outputs ready for use with AERMOD, AERMET, CALMET and CALPUFF.
Meteorological datasets are developed using the Weather Research and Forecasting (WRF) model and processed using established model-specific tools and procedures.
Available Data Formats
AERMOD Ready
- Surface Met Data File (*.SFC)
- Profile Met Data File: (*.PFL)
AERMET Ready
- Surface Met Data File: ONSITE Format (*.DAT)
- Upper Air Met Data File: FSL Format (*.FSL)
- AERMET Input Files for Stages 1, 2, 3 (*.IN)
CALPUFF Ready
WRF meteorological data can be processed using MMIF to produce three-dimensional meteorological fields for CALPUFF applications. Outputs can include TXT, DAT, GRD and AUX files covering the required horizontal domain and vertical layers.
CALMET Ready
WRF-ARW output can be processed using CALWRF to produce the three-dimensional meteorological data (3D.DAT) required by CALMET.
Terrain Elevation Data
Terrain data are often a necessary part of air dispersion modelling. AERMAP, which is a terrain pre-processor for AERMOD; processes Digital Elevation Data and creates a file suitable for use within an AERMOD control file. This file contains elevation and hill-height scaling factors for each receptor in the air dispersion study.
We can provide Terrain Data in Digital Elevation Model (DEM) and National Elevation Dataset (NED) GeoTIFF formats. You can buy DEM tiles for most of the world. Each tile covers a block of land that is 1 degree of latitude by 1 degree of longitude (approximately 100×100 km), with a resolution of approximately 90 meters. We may also provide custom sized DEM tiles on demand.