The Grwinven program applies the growth factors to the inventory pollutants by simply multiplying the growth matrices for the pollutants with the annual and average-day emission values. It reads in the SMOKE intermediate inventory file and up to 80 growth matrices, then applies the growth factors from all growth matrices to the appropriate pollutants. If a growth matrix has the “pfac” variable, Grwinven applies the factors to all pollutants in the inventory; if instead the matrix has pollutant-specific entries, the factors are applied by matching the pollutants between the matrix and the inventory.

As is further described in Section 2.13, “Control processing”, Grwinven can also apply the control matrix at the same time it applies the growth matrix, and the total number of growth and control matrices that can be applied in one run is 80. The Grwinven program’s growth processing features cannot be applied to a SMOKE intermediate file that Grwinven has created, because of the /FYEAR/ header element described in the next section.