Processing categories: mobile
Movesmrg is a mobile-sources-only program, loosely based on the SMOKE program Smkmerge, that combines the intermediate files produced by the other SMOKE programs (i.e., SmkInven, Grdmat, Spcmat, Temporal). The movesmrg program is discussed in detail in Section 6.8, “Movesmrg”. Similar to Smkmerge, the main goal of Movesmrg is to create (1) gridded, speciated, hourly air quality model-ready input files and (2) county-level SCC summaries. The primary difference between Movesmrg and Smkmerge is that Movesmrg uses the SMOKE Formatted MOVES emission rate lookup tables to compute emissions on the fly, by multiplying the emissions factors by hourly VMT (for RatePerDistance [RPD]), annual or monthly hotelling hours (for RatePerHour [RPH]) or by monthly or annual vehicle populations (for RatePerVehicle [RPV] or RatePerProfile [RPP]).
Movesmrg must be run four times to compute on-roadway and off-network (including vapor venting) emissions processes individually, since the emission rate calculation methods in SMOKE for these categories are quite different. Once all three emissions processes have been computed, the emission output files can be merged (optionally along with other 2D sectors separate from onroad) using Mrggrid, which combines any number of 2D or 3D hourly, gridded, and speciated emission data files. See the section Section 6.10, “Mrggrid” for more details on the above programs.
For its RPD, RPH and RPV lookup table calculations, Movesmrg uses the gridded hourly temperatures in GMT, and then adjusts the hour of the RPD, RPH and RPV lookup tables from local time to GMT to get the emission rates for the representative county for the appropriate month. The key lookup fields for the factors are hourly temperature and avarage speed for the RPD lookup table calculation, hourly temperature for the RPH lookup table calculation, and hourly temperature and hour of the day in local time for the RPV table calculation.
For the RPP lookup table calculations, Movesmrg uses the RPP lookup table as an input file for the emission rates that depend not on the gridded hourly temperatures, but on the temperature profiles output by the Met4moves program. The emissions estimates based on the RPP table are computed for the temporal averaging period specified for the temperature profiles, rather than using hourly gridded meteorology.