Miller, S.W., and Bodhaine, B. A. (1982). Supersaturation

and Expansion Ratios in Condensation Nuclei

Counters:An Historical Perspective, J.Aerosol

Sci. 13:481–490.

R. Leaitch, W.J. Megaw (1982).

The diffusion tube; a cloud condensation nucleus counter for use below 0.3% supersaturation Original Research Article

Journal of Aerosol Science, Volume 13, Issue 4, 297-319.

thank you Uwe but i can not able to access the full length article, it will be extremely helpful if you kindly send those two articles in my email id.

Hi,

your question is too general to get a detailed answer. which instrument are you using? why do you prefer choosing only one supersaturation point and what exactly are you trying to study from it. I hope that with these details I will be able to give you a helpful answer.

Avi.

Hello,

I've worked with a DTM CCN Counter and we generally defined supersaturations below 1%. I think it's a good threshold and coherent with in-cloud conditions. The specific levels I used in my masters work were 0.2, 0.4, 0.6, 0.8 and 1.0%.

Regards,

Micael

Depends on the size range you are interested in activating in the CCNc. Consider the relationship between supersaturation and critical diameter for an aerosol with known hygroscopicity parameter (kappa).