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Abstract

An aerosol dynamics model, AERO2, is presented, which describes the formation of H(2)SO(4)-H(2)O aerosol in a smog chamber. The propagation of uncertainties through such a model is analysed in terms of the following input parameters: (i) the rate of reaction between SO(2) and OH(k(1)); (ii) the ratio between AERO2's nucleation rate and that derived from classical nucleation theory (t(n)); (iii) the H(2)SO(4) mass accommodation coefficient (alpha); (iv) the turbulence intensity in the reactor (k(e)). It is shown that AERO2 and aerosol dynamics models in general can only predict upper bounds for the total number (N(tot)) and total volume (V(tot)) concentrations of the particles. The uncertainties on N(tot) and V(tot) are mainly due to the uncertainties on k(1) and t(n). An uncertainty factor of 20-100 still remains when the uncertainty on k(1) is reduced to +/- 5 %. Aerosol measurements from three smog chamber experiments have therefore been used in an attempt to reduce the uncertainty on k(1) and t(n).

Additional information

Authors: RAES F, JRC Ispra (IT);SALTELLI A, JRC Ispra (IT);VAN DINGENEN R, JRC Ispra (IT)
Bibliographic Reference: Article: Journal of Aerosol Science, Vol. 23 (1992) No. 7, pp. 759-771
Record Number: 199310585 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en