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Software Open Access

CEMPD/SMOKE: SMOKE v4.8 Public Release (October 2020)

B.H. Baek; Catherine Seppanen

SMOKE Digital Object Identifier (DOI): SMOKE-MOVES Integration Tool Development 1. <b>New MOVES RatePerStart (RPS) Mode</b>

  • New feature in <b>Movesmrg</b> for users to model Off-Network Start Exhaust and Crankcase Start Exhaust processes that are currently modeled under RatePerVehicle (RPV) mode.
  • Unit of RPS emission rate is mass per vehicle-engine start (grams/vehicle-start).
  • New "STARTS" activity inventory is required to compute RPS emissions with RPS emission rates.
  • RPS_MODE[default: N] : Estimates off-network RPS emissions from engine starts.

2. <b>New New Off-Network Idling (ONI) Mode</b>

  • New feature in <b>Movesmrg</b> for users to model idling emissions from parking lot, distribution centers and other off-network spaces.
  • Previously modeled under RatePerDistance (RPD) mode with roadtypes=1 (off-network) and speedbin=0 (speed=zero).\
  • Unit of ONI emission rate is mass per vehicle-idling hour (grams/hour).
  • New "IDLING" activity inventory is required to compute ONI emissions with ONI emission rates.
  • ONI_MODE [default: N] : Estimates off-network idling emissions from parking, and distribution centers.

New Source Apportionment Regroup Tool

  • New Source Apportionment Regroup Tool will allow users to assign existing Source Apportionment (SA)-ready gridded hourly emissions and stack groups files from SMOKE to new SA group IDs.
  • Requires the sector-specific SA-ready gridded hourly emissions and stack group files and new regroup mapping input file called <a href=""> REGROUP_GROUPS</a>.
  • Check out <a href=""> the Coordinating Research Council (CRC) A-119 Full Technical Report</a> for the details.
  • Download the complete use case package data file for the SA regroup tool from <a href=""> the CRC Data Share Site</a>.

BEIS v3.7 Enhancements

  • New BEIS Emission Factors (BEISFAC) and BELD5 landuse input files are required.
  • Latest BEISFAC and North America region BELD5 (1km x 1km) input files for BEIS v3.7 can be found from <a href=""> the CMAS Data Warehouse</a>.
  • Custom BELD5 input file over your modeling domain can be developed using new updated <b>Aggwndw</b> utility program in SMOKE that can optionally aggregate non-mass values with the setting of AGGREGATE_EMIS_YN = N.

Laypoint Updates

  • Update to treat new WRF hybrid-vertical coordinate type (-999) as existing sigma (7) coordinate.
  • Update to enforce fire bottom plume height starting from surface layer.
  • New FIRE_BOTTOM_LAYER_1_YN [Default: Y]: Define the bottom of fire plume as model layer 1.

Smkinven Updates

  • Prevent from dropping CEMS hourly NOX and SO2 emissions when all CEMS parameters (e.g., heat input, steam load and gross load) are missing.
  • Update to proper handle multiple ORIS and Boiler IDs CEMS sources under the same point source Unit ID.
  • PROCESS_MULT_ORIS_UNITS_YN [default: N]: Allows Smkinven to append "__##" to Unit ID to treat them as separate point sources.

Spcmat and Smkreport Updates

  • Generate correct Smkreport reports for the inventory sources with multiple speciation profiles assigned by GSPRO_COMBO and/or multiple GSREF cross-referencing approaches.
  • New speciation profile description (GSPRODESC) input file support in Smkreport. Users can optionally output the speciation profile descriptions to Smkreport "BY SPCCODE" report.</li>


  • Added new command "AERMOD ANNUAL" in Smkreport to generate emission helper files for AERMOD model for sectors other than onroad.
  • Overall updates across all sectors (e.g., point, area, commercial marine vessel port & underway, and gridded sectors).

Bug fixes

  • Various bug fixes since the public SMOKE version 4.6 release in September 2018
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