Articles | Volume 6, issue 12
Atmos. Chem. Phys., 6, 4175–4214, 2006
Atmos. Chem. Phys., 6, 4175–4214, 2006

  21 Sep 2006

21 Sep 2006

Columnar modelling of nucleation burst evolution in the convective boundary layer – first results from a feasibility study
Part I: Modelling approach

O. Hellmuth O. Hellmuth
  • Leibniz Institute for Tropospheric Research, Modelling Department, Permoserstrasse 15, 04318 Leipzig, Germany

Abstract. A high-order modelling approach to interpret "continental-type" particle formation bursts in the anthropogenically influenced convective boundary layer (CBL) is proposed. The model considers third-order closure for planetary boundary layer turbulence, sulphur and ammonia chemistry as well as aerosol dynamics. In Paper I of four papers, previous observations of ultrafine particle evolution are reviewed, model equations are derived, the model setup for a conceptual study on binary and ternary homogeneous nucleation is defined and shortcomings of process parameterisation are discussed. In the subsequent Papers II, III and IV simulation results, obtained within the framework of a conceptual study on the CBL evolution and new particle formation (NPF), will be presented and compared with observational findings.

Final-revised paper