Dear all. I want to look at climate effects of various aerosol sources and processes in the boreal environment due to the cloud albedo effect, specifically the Nordic countries, and especially due to forests.

I would like to know the radiative forcing over the entire Nordic Area and as average over all seasons as function of increase in cloud condensation nuclei (CCN) expressed as particle number concentration above 100 nm diameter (often denoted N100). I am aware that this is not an exact number of CCN at certain supersaturation and that there are a lot of simplifications needed to be able to provide such a number, but I just need a rough number for an order of the envelope calculation. I guess this can be found in model papers, but it is hard to do the search. i can also receive the radiative forcing directly as function of the true CCN number at for example 0.2 % supersaturation.

For example, I just need a number saying that an increase of average N100 from 500 particles per cubic centimeter to 550 particles per cubic centimeter, leads to a radiative forcing of -0.1 W per meter squared for the cloud albedo effect over the Nordic Area.

THanks all! If you can provide a number from a reference, I am happy to add you as co-author of a future paper.