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| Titel |
Incorporation of the C-GOLDSTEIN efficient climate model into the GENIE framework: "eb_go_gs" configurations of GENIE |
| VerfasserIn |
R. Marsh, S. A. Müller, A. Yool, N. R. Edwards |
| 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 ; 4, no. 4 ; Nr. 4, no. 4 (2011-11-15), S.957-992 |
| Datensatznummer |
250001915
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| Publikation (Nr.) |
 copernicus.org/gmd-4-957-2011.pdf |
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| Zusammenfassung |
| A computationally efficient, intermediate complexity
ocean-atmosphere-sea ice model (C-GOLDSTEIN) has been incorporated
into the Grid ENabled Integrated Earth system modelling (GENIE)
framework. This involved decoupling of the three component modules
that were re-coupled in a modular way, to allow replacement with
alternatives and coupling of further components within the
framework. The climate model described here (referred to as
"eb_go_gs" for short) is the most basic version of GENIE in which
atmosphere, ocean and sea ice all play an active role. Among
improvements on the original C-GOLDSTEIN model, latitudinal grid
resolution is generalized to allow a wider range of surface grids to
be used. The ocean, atmosphere and sea-ice components of the "eb_go_gs"
configuration of GENIE are individually described, along with details
of their coupling. The setup and results from simulations using four
different meshes are presented. The four alternative meshes comprise
the widely-used 36 × 36 equal-area-partitioning of the Earth surface with
16 depth layers in the ocean, a version in which horizontal and vertical resolution
are doubled, a setup matching the horizontal resolution of the dynamic
atmospheric component available in the GENIE framework, and a setup
with enhanced resolution in high-latitude areas. Results are presented for
a spin-up experiment with a baseline parameter set and wind forcing
typically used for current studies in which "eb_go_gs" is coupled with
the ocean biogeochemistry module of GENIE, as well as for an experiment
with a modified parameter set, revised wind forcing, and additional
cross-basin transport pathways (Indonesian and Bering Strait throughflows).
The latter experiment is repeated with the four mesh variants, with common
parameter settings throughout, except for time-step length. Selected state
variables and diagnostics are compared in two regards: (i) between simulations
at lowest resolution that are obtained with the baseline and modified
configurations, predominantly in order to evaluate the revision of the wind
forcing, the modification of some key parameters, and the effect of additional
transport pathways across the Arctic Ocean and the Indonesian Archipelago;
(ii) between simulations with the four meshes, in order to explore various
effects of mesh choice. |
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