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UP: Umweltphysik

UP 16: Datenauswertung und Modellierung (Atmosphäre) II

UP 16.2: Vortrag

Dienstag, 19. März 2002, 16:45–17:00, HS 16

Ordinary differential equation solver and long time behavior of realistic pollutants in the troposphere — •H. Lustfeld¹ and D. Poppe² — ¹Forschungszentrum Jülich, IFF, 52425 Jülich — ²Forschungszentrum Jülich, ICG II, 52425 Jülich

An enormous amount of CPU time for solving stiff differential equations is required to get insight into the long time properties of pollutants in the troposphere. Various integration schemes have been applied in the past. The best known are variants of Gear’s[1] method whereas extrapolation schemes[2] are rarely used. We show that in many cases extrapolation schemes are simpler and faster. Using them we present long time behavior of pollutant concentrations over a wide range of parameters.

[1] C.W. Gear, Numerical initial value Problems..., Eglewood Cliffs, NJ, Prentice Hall 1971
[2] P. Deuflhard, F.A. Bornemann, Numerische Mathematik II, de Gruyter, Berlin 1994