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| Titel |
The terminator "toy" chemistry test: a simple tool to assess errors in transport schemes |
| VerfasserIn |
P. H. Lauritzen, A. J. Conley, J.-F. Lamarque, F. Vitt, M. A. Taylor |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 8, no. 5 ; Nr. 8, no. 5 (2015-05-04), S.1299-1313 |
| Datensatznummer |
250116335
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| Publikation (Nr.) |
 copernicus.org/gmd-8-1299-2015.pdf |
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| Zusammenfassung |
| This test extends the evaluation of transport schemes from
prescribed advection of inert scalars to reactive species. The test
consists of transporting two interacting chemical species in the Nair and Lauritzen 2-D idealized flow field.
The sources and sinks for these two species are given by a simple, but
non-linear, "toy" chemistry that represents combination (X + X → X2)
and dissociation (X2 → X + X). This chemistry mimics
photolysis-driven conditions near the solar terminator, where
strong gradients in the spatial distribution of the species develop
near its edge. Despite the large spatial
variations in each species, the weighted sum
XT = X + 2X2 should always be preserved at spatial scales at which
molecular diffusion is excluded.
The terminator test demonstrates how well the advection–transport
scheme preserves linear correlations. Chemistry–transport (physics–dynamics) coupling can
also be studied with this test. Examples of the consequences of this
test are shown for illustration. |
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