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Evaluation of a near-global eddy-resolving ocean model

Citation

Oke, PR and Griffin, DA and Schiller, A and Matear, RJ and Fiedler, R and Mansbridge, J and Lenton, A and Cahill, M and Chamberlain, MA and Ridgway, K, Evaluation of a near-global eddy-resolving ocean model, Geoscientific Model Development, 6, (3) pp. 591-615. ISSN 1991-959X (2013) [Refereed Article]

DOI: doi:10.5194/gmd-6-591-2013

Abstract

Analysis of the variability of the last 18 yr (1993- 2012) of a 32 yr run of a new near-global, eddy-resolving ocean general circulation model coupled with biogeochemistry is presented. Comparisons between modelled and observed mean sea level (MSL), mixed layer depth (MLD), sea level anomaly (SLA), sea surface temperature (SST), and chlorophyll a indicate that the model variability is realistic. We find some systematic errors in the modelled MLD, with the model generally deeper than observations, which results in errors in the chlorophyll a, owing to the strong biophysical coupling. We evaluate several other metrics in the model, including the zonally averaged seasonal cycle of SST, meridional overturning, volume transports through key straits and passages, zonally averaged temperature and salinity, and El Nĩno-related SST indices. We find that the modelled seasonal cycle in SST is 0.5-1.5 C weaker than observed; volume transports of the Antarctic Circumpolar Current, the East Australian Current, and Indonesian Throughflow are in good agreement with observational estimates; and the correlation between the modelled and observed NINO SST indices exceeds 0.91. Most aspects of the model circulation are realistic. We conclude that the model output is suitable for broader analysis to better understand upper ocean dynamics and ocean variability at mid-And low latitudes. The new model is intended to underpin a future version of Australia's operational short-range ocean forecasting system.

Item Details

Item Type:Refereed Article
Keywords:eddies, ocean model, general circulation model
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical Oceanography
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Marine Oceanic Processes (excl. climate related)
Author:Oke, PR (Dr Peter Oke)
Author:Schiller, A (Dr Andreas Schiller)
Author:Matear, RJ (Dr Richard Matear)
Author:Lenton, A (Dr Andrew Lenton)
ID Code:119508
Year Published:2013
Web of Science® Times Cited:39
Deposited By:Centre for Oceans and Cryosphere
Deposited On:2017-08-02
Last Modified:2017-08-02
Downloads:0

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