| Autor: |
Deng Yi-xiang, Chen Ji-ning, Hu Xue-tao |
| Předmět: |
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| Zdroj: |
Journal of Environmental Sciences (IOS Press). Apr2001, Vol. 13 Issue 2, p189. 3p. 2 Graphs. |
| Abstrakt: |
Abstract: MAGIC is one of the most widely used models for forecasting long-term acidification. The model' s code, however, has been experiencing numerical instability, though this might not be widely known to the public users. The major instability comes from the analytical solution to two cubic equations for calculating SO[sup 2-, sub 4] concentration and the exchangeable fraction of A1 on the soils. The mathematical algorithm for calculating the concentration of SO[sup 2-, sub 4] from a quadratic equation is also found instable. This paper is aimed at improving the instability above through proved numerical algorithms. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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