impact: an implicit time integration scheme for chemical species and families
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ID: 243135
2000
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Abstract
The implicit time integration scheme of Stott
and Harwood (1993) was proposed as an efficient scheme for use in
three-dimensional chemical models of the atmosphere. The scheme was designed for
chemistry schemes using `chemical families', in which species with short
lifetimes are grouped into longer-lived families. Further study with more
complex chemistry, more species and reactions showed the scheme to be
non-convergent and unstable under certain conditions; particularly for the
perturbed chemical scenarios of polar stratospheric winters. In this work the
scheme has been improved by revising the treatment of families and the
convergence properties of the scheme. The new scheme has been named IMPACT (IMPlicit
Algorithm for Chemical Time-stepping). It remains easy to implement and produces
simulations that compare well with integrations using more accurate higher order
schemes.
Key words: Atmospheric composition and structure (middle atmosphere - composition and chemistry; lioposphere - composition and chemistry; instruments and techniques)
Key words: Atmospheric composition and structure (middle atmosphere - composition and chemistry; lioposphere - composition and chemistry; instruments and techniques)
| Reference Key |
carver2000annalesimpact:
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|---|---|
| Authors | ;G. D. Carver;G. D. Carver;G. D. Carver;P. A. Stott;P. A. Stott;P. A. Stott |
| Journal | journal of food measurement and characterization |
| Year | 2000 |
| DOI |
10.1007/s00585-000-0337-y
|
| URL | |
| Keywords |
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