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| Titel |
Tracers and traceability: implementing the cirrus parameterisation from LACM in the TOMCAT/SLIMCAT chemistry transport model as an example of the application of quality assurance to legacy models |
| VerfasserIn |
A. M. Horseman, A. R. MacKenzie, M. P. Chipperfield |
| 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 ; 3, no. 1 ; Nr. 3, no. 1 (2010-03-16), S.189-203 |
| Datensatznummer |
250000801
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| Publikation (Nr.) |
 copernicus.org/gmd-3-189-2010.pdf |
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| Zusammenfassung |
A new modelling tool for the investigation of large-scale behaviour of cirrus
clouds has been developed. This combines two existing models, the
TOMCAT/SLIMCAT chemistry transport model (nupdate library version 0.80,
script mpc346_l) and cirrus parameterisation of Ren and MacKenzie (LACM
implementation not versioned). The development process employed a subset of
best-practice software engineering and quality assurance processes, selected
to be viable for small-scale projects whilst maintaining the same
traceability objectives. The application of the software engineering and
quality control processes during the development has been shown to be not a
great overhead, and their use has been of benefit to the developers as well
as the end users of the results. We provide a step-by-step guide to the
implementation of traceability tailored to the production of geo-scientific
research software, as distinct from commercial and operational software. Our
recommendations include: maintaining a living "requirements list"; explicit
consideration of unit, integration and acceptance testing; and automated
revision/configuration control, including control of analysis tool scripts
and programs.
Initial testing of the resulting model against satellite and in-situ
measurements has been promising. The model produces representative results
for both spatial distribution of the frequency of occurrence of cirrus ice,
and the drying of air as it moves across the tropical tropopause. The model
is now ready for more rigorous quantitative testing, but will require the
addition of a vertical wind velocity downscaling scheme to better represent
extra-tropical continental cirrus. |
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