Journal article

A numerical comparison of different methods for determining the particle formation rate

Vuollekoski H, Sihto S, Kerminen V, Kulmala M, Lehtinen K ...see all

Atmospheric Chemistry and Physics, vol. 12, issue 5 (2012) pp. 2289-2295

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Abstract

Different methods of determining formation rates of 3 nm particles are
compared, basing on analysis of simulated data, but the results are
valid for analyses of experimental particle size distribution data as
well, at least within the accuracy of the applied model. The study shows
that the method of determining formation rates indirectly from measured
number concentration data of 3-6 nm particles is generally in good
agreement with the theoretical calculation with a systematic error of
0-20%. While this accuracy is often enough, a simple modification to
the approximative equation for the formation rate is recommended. A
brief study on real atmospheric data implied that in some cases the
accuracy gain may be significant.

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Authors

  • H. Vuollekoski

  • S. L. Sihto

  • V. M. Kerminen

  • M. Kulmala

  • K. E.J. Lehtinen

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