References

GMD

Geoscientific Model Development

GMD

Geosci. Model Dev.

1991-9603

Copernicus Publications

Göttingen, Germany

10.5194/gmd-6-591-2013

Evaluation of a near-global eddy-resolving ocean model

Oke

P. R.

¹ Griffin

D. A.

¹ Schiller

https://orcid.org/0000-0001-8530-166X

¹ Matear

R. J.

¹ Fiedler

¹ Mansbridge

¹ Lenton

¹ Cahill

¹ Chamberlain

M. A.

¹ Ridgway

Centre for Australian Weather and Climate Research, CSIRO Marine and Atmospheric Research, G.P.O. Box 1538, Hobart TAS 7001, Australia

03 05 2013

6 3 591 615

2013

This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/

This article is available from https://gmd.copernicus.org/articles/6/591/2013/gmd-6-591-2013.html

The full text article is available as a PDF file from https://gmd.copernicus.org/articles/6/591/2013/gmd-6-591-2013.pdf

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 {\chla} 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 {\chla}, 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 Niño-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.

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