 |
| Titel |
The SOCOL version 3.0 chemistry–climate model: description, evaluation, and implications from an advanced transport algorithm |
| VerfasserIn |
A. Stenke, M. Schraner, E. Rozanov, T. Egorova, B. Luo, T. Peter |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1991-959X
|
| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 6, no. 5 ; Nr. 6, no. 5 (2013-09-09), S.1407-1427 |
| Datensatznummer |
250084984
|
| Publikation (Nr.) |
 copernicus.org/gmd-6-1407-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| We present the third generation of the coupled chemistry–climate model (CCM)
SOCOL (modeling tools for studies of SOlar Climate Ozone Links). The most
notable modifications compared to the previous model version are (1) the
dynamical core has been updated with the fifth generation of the
middle-atmosphere general circulation model MA-ECHAM (European Centre/HAMburg
climate model), and (2) the advection of the chemical species is now
calculated by a mass-conserving and shape-preserving flux-form transport
scheme instead of the previously used hybrid advection scheme. The whole
chemistry code has been rewritten according to the ECHAM5 infrastructure and
transferred to Fortran95. In contrast to its predecessors, SOCOLvs3 is now
fully parallelized. The performance of the new SOCOL version is evaluated on
the basis of transient model simulations (1975–2004) with different
horizontal (T31 and T42) resolutions, following the approach of the CCMVal-1
model validation activity. The advanced advection scheme significantly
reduces the artificial loss and accumulation of tracer mass in regions with
strong gradients that was observed in previous model versions. Compared to
its predecessors, SOCOLvs3 generally shows more realistic distributions of
chemical trace species, especially of total inorganic chlorine, in terms of
the mean state, but also of the annual and interannual variability.
Advancements with respect to model dynamics are for example a better
representation of the stratospheric mean state in spring, especially in the
Southern Hemisphere, and a slowdown of the upward propagation in the tropical
lower stratosphere. Despite a large number of improvements model deficiencies
still remain. Examples include a too-fast vertical ascent and/or horizontal
mixing in the tropical stratosphere, the cold temperature bias in the
lowermost polar stratosphere, and the overestimation of polar total ozone
loss during Antarctic springtime. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|