Community Modeling and Analysis System

Speciation Tool


Speciation Tool version 5.0 Release Notes

  • Creates chemical speciation profiles needed to convert emission inventory pollutants (e.g., VOC, PM2.5) to model species for air quality modeling (e.g., using CMAQ and CAMx)
  • Outputs the chemical speciation profiles in formats used by SMOKE (i.e., GSPRO and GSCNV files)
  • Includes chemical speciation data from the EPA SPECIATE 5.0 database
  • Includes VOC mechanism mappings for several gas-phase mechanisms, namely CB05, CB6, SAPRC07T, CRI and RACM2, as implemented in CMAQ and CAMx. See Table 1 of User's Guide for a complete list and details of supported chemical mechanisms.
  • VOC mechanism mappings consider volatility to determine whether each compound is mapped to reactive model species (e.g. CB6) or intermediate-volatility model species (IVOC) or non-volatile model species (NVOL)
  • Optionally maps IVOC and NVOL compounds to the CMAQ Volatility Basis Set (VBS) scheme
  • Includes mappings of primary PM2.5 and PM10 to the CMAQ (AE6 and AE7) and CAMx (CF2) aerosol schemes
  • Create CMAQ AE6 speciation profiles from raw PM2.5 profiles in SPECIATE
  • Please check out the Speciation Tool Git Repository for more details

This is the official Speciation Tool website hosted by the Center for Environmental Modeling for Policy Development (CEMPD) at the University of North Carolina at Chapel Hill. The Speciation Tool is an active open-source development project developed by the Ramboll, and distributed by the Community Modeling and Analysis System Center.