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ACCESS-OM2 v1.0: a global ocean-sea ice model at three resolutions

Citation

Kiss, A and McC Hogg, A and Hannah, N and Boeira Dias, F and Brassington, GB and Chamberlain, MA and Chapman, C and Dobrohotoff, P and Domingues, CM and Duran, ER and England, MH and Fiedler, R and Griffies, SM and Heerdegen, A and Heil, P and Holmes, RM and Klocker, A and Marsland, SJ and Morrison, AK and Munroe, J and Nikurashin, M and Oke, PR and Pilo, GS and Richet, O and Savita, A and Spence, P and Stewart, KD and Ward, ML and Wu, F and Zhang, X, ACCESS-OM2 v1.0: a global ocean-sea ice model at three resolutions, Geoscientific Model Development, 13 pp. 401-442. ISSN 1991-959X (2020) [Refereed Article]


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Copyright 2020 the authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.5194/gmd-13-401-2020

Abstract

We introduce ACCESS-OM2, a new version of the ocean–sea ice model of the Australian Community Climate and Earth System Simulator. ACCESS-OM2 is driven by a prescribed atmosphere (JRA55-do) but has been designed to form the ocean–sea ice component of the fully coupled (atmosphere–land–ocean–sea ice) ACCESS-CM2 model. Importantly, the model is available at three different horizontal resolutions: a coarse resolution (nominally 1 horizontal grid spacing), an eddy-permitting resolution (nominally 0.25), and an eddy-rich resolution (0.1 with 75 vertical levels); the eddy-rich model is designed to be incorporated into the Bluelink operational ocean prediction and reanalysis system. The different resolutions have been developed simultaneously, both to allow for testing at lower resolutions and to permit comparison across resolutions. In this paper, the model is introduced and the individual components are documented. The model performance is evaluated across the three different resolutions, highlighting the relative advantages and disadvantages of running ocean–sea ice models at higher resolution. We find that higher resolution is an advantage in resolving flow through small straits, the structure of western boundary currents, and the abyssal overturning cell but that there is scope for improvements in sub-grid-scale parameterizations at the highest resolution.

Item Details

Item Type:Refereed Article
Keywords:coupled modelling, sea-ice/ocean system, Antarctica, Southern Ocean
Research Division:Earth Sciences
Research Group:Other Earth Sciences
Research Field:Earth Sciences not elsewhere classified
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Effects of Climate Change and Variability on Antarctic and Sub-Antarctic Environments (excl. Social Impacts)
UTAS Author:Boeira Dias, F (Mr Fabio Boeira Dias)
UTAS Author:Domingues, CM (Dr Catia Domingues)
UTAS Author:Heil, P (Dr Petra Heil)
UTAS Author:Klocker, A (Dr Andreas Klocker)
UTAS Author:Marsland, SJ (Mr Simon Marsland)
UTAS Author:Nikurashin, M (Dr Maxim Nikurashin)
UTAS Author:Savita, A (Mr Abhishek Savita)
ID Code:139718
Year Published:2020
Funding Support:Australian Research Council (LP160100073)
Web of Science® Times Cited:3
Deposited By:Australian Antarctic Program Partnership
Deposited On:2020-06-29
Last Modified:2020-07-07
Downloads:0

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