PLASIM–GENIE v1.0: a new intermediate complexity AOGCM
We describe the development, tuning and climate of Planet Simulator (PLASIM)–Grid-ENabled Integrated Earth system model (GENIE), a new intermediate complexity Atmosphere–Ocean General Circulation Model (AOGCM), built by coupling the Planet Simulator to the ocean, sea-ice and land-surface components...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-09-01
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| Series: | Geoscientific Model Development |
| Online Access: | http://www.geosci-model-dev.net/9/3347/2016/gmd-9-3347-2016.pdf |
| Summary: | We describe the development, tuning and climate of Planet Simulator (PLASIM)–Grid-ENabled Integrated Earth system model (GENIE), a new
intermediate complexity Atmosphere–Ocean General Circulation Model (AOGCM), built
by coupling the Planet Simulator to the ocean, sea-ice and land-surface
components of the GENIE Earth system model. PLASIM–GENIE supersedes
GENIE-2, a coupling of GENIE to the Reading Intermediate General Circulation Model (IGCM). The primitive-equation
atmosphere includes chaotic, three-dimensional (3-D) motion and interactive radiation and clouds,
and dominates the computational load compared to the relatively simpler
frictional-geostrophic ocean, which neglects momentum advection. The model
is most appropriate for long-timescale or large ensemble studies where
numerical efficiency is prioritised, but lack of data necessitates an
internally consistent, coupled calculation of both oceanic and atmospheric
fields. A 1000-year simulation with PLASIM–GENIE requires approximately 2
weeks on a single node of a 2.1 GHz AMD 6172 CPU. We demonstrate the
tractability of PLASIM–GENIE ensembles by deriving a subjective tuning
of the model with a 50-member ensemble of 1000-year simulations. The
simulated climate is presented considering (i) global fields of seasonal
surface air temperature, precipitation, wind, solar and thermal radiation,
with comparisons to reanalysis data; (ii) vegetation carbon, soil moisture
and aridity index; and (iii) sea surface temperature, salinity and ocean
circulation. Considering its resolution, PLASIM–GENIE reproduces the main
features of the climate system well and demonstrates usefulness for a wide
range of applications. |
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| ISSN: | 1991-959X 1991-9603 |