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