Aerobiologia

, Volume 20, Issue 1, pp 3–19

Numerical modelling of pollen dispersion on the regional scale

  • Nora Helbig
  • Bernhard Vogel
  • Heike Vogel
  • Franz Fiedler
Article

DOI: 10.1023/B:AERO.0000022984.51588.30

Cite this article as:
Helbig, N., Vogel, B., Vogel, H. et al. Aerobiologia (2004) 20: 3. doi:10.1023/B:AERO.0000022984.51588.30

Abstract

New parameterisations were developed to calculate the emission and resuspension flux of pollen grains. These new parameterisations were included in the comprehensive mesoscale model system KAMM/DRAIS. Two types of simulations were performed. In the first case, horizontally homogeneous meteorology was assumed. In this case, pollen concentration rapidly decreased with the distance from the source. In the second case, where the fully three-dimensional model was applied, atmospheric lifetime of the pollen grains increased remarkably. This was mainly caused by the vertical wind speeds induced by topographic effects. Consequently, the pollen grains could travel much larger distances until they were deposited and finally removed from the atmosphere. This is an important finding with respect to the problem of cross pollination. Due to the lack of measurements, a number of parameters had to be assumed. However, the parameterisation proposed may well serve as a starting point of a daily pollen forecast with numerical models.

numerical model parameterisation pollen dispersion pollen emission pollen resuspension regional scale 

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Nora Helbig
    • 1
  • Bernhard Vogel
    • 1
  • Heike Vogel
    • 1
  • Franz Fiedler
    • 1
  1. 1.Institut für Meteorologie und Klimaforschung (IMK)Forschungszentrum Karlsruhe/Universität Karlsruhe, GermanyKarlsruheGermany

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