Sulfate unit conversion from ppmv to ug/kg

• Description: Convert sulfate concentration in ppmv to mass fraction in ug/kg

• Name: SulfateMassFraction_A

• Variable produced: mass_fraction_of_sulfate_in_air

• Input Variables: sulfate_ppmv

• Number of Levels: The same number of levels as the input Fields

• FunctionSpace: The same FunctionSpace as the input Fields

• hasTLAD: False

• Required Configuration Variables: * sulfmw - molecular weight of sulfate * airmw - molecular weight of air

• Optional Parameters: None