direct radiative efficiencies of reactive gas SLCFs

[chrisroadmap]

CO = 0.00079 W m-2 ppb-1 (Hodnebrog et al. 2020) - this isn't insignificant
NH3 = 0.0607 W m-2 ppb-1
Sulfur dioxide 0.01778 W m-2 ppb-1 (will be much offset by its indirect aerosol forming effect, then we have to consider oxidation to SO4 as a separate process)
VOCs = ? (weighted sum of the parts)
NO = 0.00029 W m-2 ppb-1
NO2 = 0.00475 W m-2 ppb-1

then there is also oxidation of CH4 and VOCs to CO, and all of these three things to CO2

[chrisroadmap]

Also: to do SLCFs properly we need to consider gas and aerosol phases of species separately. We would need a tracer for SO2 and SO4 (most sulfur emitted as SO2, a small portion is SO4), SO2 contributes direct forcing, hangs around for about a day, gets converted into SO4, which is a strong aerosol, then hangs around a few more days and finally disappears.