Information about SMOKE - 30 September 2004 The Sparse Matrix Operator Kernel Emission (SMOKE) model was developed by the Environmental Modeling Center at MCNC under cooperative research agreements and contracts with the U.S. Environmental Protection Agency (EPA). Development of SMOKE continues at UNC-CEP and is partially supported by CMAS. The emissionS data for the tutorial of this release of CMAQ were prepared with SMOKE. SMOKE code is open source Fortran90 code, and is consistent with the netCDF I/O API convention used by CMAQ. Emission inventory data are accepted by SMOKE in the Inventory Data Analyzer (IDA) format (described in the SMOKE documentation). Speciation for selected gas phase lumped species mechanisms is included. Currently, lumping to accommodate the CB4, RADM2, SAPRC99 lumped species mechanisms is accomplished by SMOKE. SMOKE also speciates fine particulate emissions (PM 2.5) to six particulate categories to support the aerosol chemistry portions of CMAQ. Hourly biogenic and on-road mobile emission data are modeled directly using BEIS 3.12 and Mobile 6, respectively, which are embedded in SMOKE. The most recently released version of SMOKE (version 2.1) may be downloaded from the CMAS web site at http://www.cmascenter.org/html/models.html A user manual, including file formats, a separate test case (not the tutorial with this CMAQ release), and other relevant links are available on the SMOKE page. Click on "Download SMOKE" to access the SMOKE code and specific installation instructions for your system.