The ACCESS Coupled Model: Description, Control Climate and Evaluation

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Bi, Dave; Dix, Martin ORCID ID icon; Marsland, Simon ORCID ID icon; O'Farrell, Siobhan; Rashid, Harun ORCID ID icon; Uotila, Petteri; Hirst, Tony; Kowalczyk, Eva; Golebiewski, Maciej; Sullivan, Arnold; Yan, Hailin; Hannah, Nicholas; Franklin, Charmaine; Sun, Zhian; Vohralik, Peter; Watterson, Ian ORCID ID icon; Zhou, Xiaobing; Fiedler, Russell; Collier, Mark; Ma, Yimin; more

Bi, Dave; Dix, Martin ORCID ID icon; Marsland, Simon ORCID ID icon; O'Farrell, Siobhan; Rashid, Harun ORCID ID icon; Uotila, Petteri; Hirst, Tony; Kowalczyk, Eva; Golebiewski, Maciej; Sullivan, Arnold; Yan, Hailin; Hannah, Nicholas; Franklin, Charmaine; Sun, Zhian; Vohralik, Peter; Watterson, Ian ORCID ID icon; Zhou, Xiaobing; Fiedler, Russell; Collier, Mark; Ma, Yimin; Noonan, Julie; Stevens, Lauren ORCID ID icon; Uhe, Peter; Zhu, Hongyan; Griffies, Stephen; Hill, Richard; Harris, Chris; Puri, Kamal less


2013-07-16


Journal Article


Australian Meteorological and Oceanographic Journal


63


1


41-64


The Australian Community Climate and Earth System Simulator coupled model (ACCESS-CM) has been developed at the Centre for Australian Weather and Climate Research (CAWCR), a partnership between CSIRO and the Bureau of Meteorology, with Australian universities, under the Australian Climate Change Science Program (ACCSP). It is built by coupling the UK Met Office atmospheric Unified Model UM, and other sub-models as required, to the ACCESS Ocean Model (ACCESS-OM), a coupled ocean-sea ice model consisting of the NOAA/GFDL ocean model MOM4p1 and the LANL sea ice model CICE4.1, under the CERFACS OASIS3.2-5 coupling framework. The primary goal of the ACCESS-CM development is to provide the Australian climate community with a new generation fully coupled climate model for climate research, and to participate in phase 5 of the Coupled Model Inter-comparison Project (CMIP5). This paper describes the ACCESS-CM framework and components, including all submodels and the coupler, and presents the control climates simulated by two versions of the ACCESS-CM (ACCESS1.0 and ACCESS1.3), together with some fields from the 20th century historical experiments, as part of model evaluation. While sharing the same ocean-sea ice core (except different setups for a few ocean and sea ice parameters), ACCESS1.0 and ACCESS1.3 differ from each other in their atmospheric and land surface components: the former is configured with the UK Met Office HadGEM2 (version r1.1) atmospheric physics and the Met Office Surface Exchange Scheme land surface model version 2, and the latter with atmospheric physics similar to the UK Met Office Global Atmosphere (GA) 1.0 including modifications performed at CAWCR and the CSIRO Community Atmosphere Biosphere Land Exchange land surface model version 1.8. The global average annual mean surface air temperature across the 500-year control integrations under preindustrial (1850) atmospheric forcing show a small drift in ACCESS1.0, and negligible drift (less than 0.1°C warming) in ACCESS1.3. The overall skills of ACCESS-CM (both versions) in simulating a set of key climatic fields both globally and over Australia significantly surpass in realism those from the preceding CSIRO Mk3.5 model delivered to the Intergovernmental Panel on Climate Change Assessment Report 4. However, ACCESS-CM, like other CMIP5 models, has deficiencies in various aspects, and these are also discussed.


Australian Bureau of Meteorology


coupled model; climate simulation; climate change; ocean model


Climate Change Processes


https://doi.org/10.22499/2.6301.004


© 2013 Commonwealth of Australia


EP125874


Journal article - Refereed


English


Bi, Dave; Dix, Martin; Marsland, Simon; O'Farrell, Siobhan; Rashid, Harun; Uotila, Petteri; Hirst, Tony; Kowalczyk, Eva; Golebiewski, Maciej; Sullivan, Arnold; Yan, Hailin; Hannah, Nicholas; Franklin, Charmaine; Sun, Zhian; Vohralik, Peter; Watterson, Ian; Zhou, Xiaobing; Fiedler, Russell; Collier, Mark; Ma, Yimin; Noonan, Julie; Stevens, Lauren; Uhe, Peter; Zhu, Hongyan; Griffies, Stephen; Hill, Richard; Harris, Chris; Puri, Kamal. The ACCESS Coupled Model: Description, Control Climate and Evaluation. Australian Meteorological and Oceanographic Journal. 2013; 63(1):41-64. <a href="https://doi.org/10.22499/2.6301.004" target="_blank">https://doi.org/10.22499/2.6301.004</a>



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