WIT Press

Fast And Efficient Solution Methods For Ozone Chemistry

Price

Free (open access)

Paper DOI

10.2495/AIR950391

Volume

9

Pages

8

Published

1995

Size

733 kb

Copyright

WIT Press

Author(s)

M. van Loon

Abstract

Fast and efficient solution methods for ozone chemistry M. van Loon Center for Mathematics and Computer Science, Department NW, ABSTRACT Two special-purpose solvers for chemical kinetics problems, the QSSA me- thod and TWOSTEP, together with the state-of-the-art stiff solver VODE, provided with sparse matrix routines, are considered for application in an atmospheric model. Of all three methods a short description is given. A comparison is made for a chemical model describing (parametrized) ozone chemistry. The code TWOSTEP turns out to be a good alternative for the QSSA solver as regards accuracy and to outperform VODE with respect to computation time for accuracies near 1%. INTRODUCTION Atmospheric models are computationally very expensive. Usually the com- putational work is dominated by the numerical treatment of systems of ordinary differential equations (ODEs) describing the chemical transforma- tions. One reason is that these systems are stiff due to the presen

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