Hamburg 2009 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 10: Poster: Umweltphysik

UP 10.18: Poster

Donnerstag, 5. März 2009, 17:48–19:00, VMP 9 Poster

Gaussian distribution functions for spreading of pollutants — •Hans Lustfeld — IFF-1, Forschungszentrum Jülich, 52425 Jülich

Spreading of pollutants and tracer particles does in general not develop like a gaussian distribution. Moreover the spreading can be quite different as a function of time, e.g. linear or exponential – or both with a crossover from linear to exponential. Simulating this complicated behavior by a gaussian distribution function describing the complicated phenomena of spreading reasonably well is highly desirable.

An appropriate way to achieve this is a cumulant expansion of the distribution function[1]. In the present contribution distribution functions for transient times are compared with the corresponding gaussian distribution functions obtained from a cumulant expansion.

[1] A. Hyvaerinen, J. Karhunen and E. Oja, Independent component analysis, John Wiley & Sons, Inc., New York, 2001