Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.240 IF 5.240
  • IF 5-year value: 5.768 IF 5-year
    5.768
  • CiteScore value: 8.9 CiteScore
    8.9
  • SNIP value: 1.713 SNIP 1.713
  • IPP value: 5.53 IPP 5.53
  • SJR value: 3.18 SJR 3.18
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 71 Scimago H
    index 71
  • h5-index value: 51 h5-index 51
Preprints
https://doi.org/10.5194/gmd-2016-17
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/gmd-2016-17
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

  15 Feb 2016

15 Feb 2016

Review status
This preprint was under review for the journal GMD but the revision was not accepted.

A near-global eddy-resolving OGCM for climate studies

X. Zhang1, P. R. Oke1, M. Feng2, M. A. Chamberlain1, J. A. Church1, D. Monselesan1, C. Sun2, R. J. Matear1, A. Schiller1, and R. Fiedler1 X. Zhang et al.
  • 1CSIRO Oceans and Atmosphere, Hobart, TAS , 7001, Australia
  • 2CSIRO Oceans and Atmosphere, Floreat, Western Australia, 6014, Australia

Abstract. Eddy-resolving global ocean models are highly desired for spatially-improved climate studies, but this is challenging because they require careful configuration and substantial computational resources. Model drift, partially related to insufficient model spin-up, imperfect model physics or bias in surface forcing, can be problematic, leading to contamination of climate change signals. In this study, we adapt a near-global eddy-resolving ocean general circulation model, originally developed for short-range ocean forecasting, for climate studies. The Ocean Forecasting Australia Model version 3 (OFAM3) is spun up for 20 years, with repeated year 1979 forcing and adaptive relaxation (Newtonian nudging) of temperature and salinity in the deep ocean to an observation-based climatology. In addition, surface heat fluxes from the JRA-55 atmospheric reanalysis are adjusted during the spin-up experiment to minimise excessive net heat uptake in the ocean. In the historical experiment, spanning 1979–2014, a non-adaptive relaxation is applied by repeating the same relaxation rates derived from the last five years of the spin-up experiment, and the surface heat flux adjustment diagnosed during the spinup experiment is also maintained. We demonstrate that the historical experiment driven by the JRA-55 reanalysis does not have significant drifts (e.g., as shown by simulated global ocean heat content), and also provides an eddy-resolving simulation of the global ocean circulation over the period 1979–2014. Decadal changes, such as the strengthening of the subtropical gyre circulation, are also reasonably simulated. A biogeochemical model is coupled with OFAM3 to produce patterns of primary productivity and carbon fluxes that are consistent with observations. Experiences gained from our numerical experiments will be helpful to other modelling groups who are interested in running global eddy-resolving OGCMs for climate studies.

X. Zhang et al.

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

X. Zhang et al.

X. Zhang et al.

Viewed

Total article views: 1,746 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
1,027 653 66 1,746 67 83
  • HTML: 1,027
  • PDF: 653
  • XML: 66
  • Total: 1,746
  • BibTeX: 67
  • EndNote: 83
Views and downloads (calculated since 15 Feb 2016)
Cumulative views and downloads (calculated since 15 Feb 2016)

Cited

Saved

Discussed

No discussed metrics found.
Latest update: 12 Aug 2020
Publications Copernicus
Download
Short summary
Eddy-resolving global ocean models are highly desired, but expensive to run, and also subject to many problems including drift. Here we modified a near-global eddy-resolving OGCM for climate studies with some novel strategies. We demonstrated that the historical experiment driven by Japanese atmospheric reanalysis product, didn't have significant drifts, and also provided an eddy-resolving simulation of the global ocean over 1979–2014. Our experiences can be helpful to other modelling groups.
Eddy-resolving global ocean models are highly desired, but expensive to run, and also subject to...
Citation