Preprints
https://doi.org/10.5194/egusphere-2023-469
https://doi.org/10.5194/egusphere-2023-469
21 Mar 2023
 | 21 Mar 2023

Evaluation of the CMCC global eddying ocean model for the Ocean Model Intercomparison Project (OMIP2)

Doroteaciro Iovino, Pier Giuseppe Fogli, and Simona Masina

Abstract. This paper describes the global eddying ocean-sea ice simulation produced at the Euro-Mediterranean Center on Climate Change (CMCC) obtained following the experimental design of the Ocean Model Intercomparison Project phase 2 (OMIP2). The eddy-rich model is based on the NEMOv3.6 framework, with a global horizontal resolution of 1/16° and 98 vertical levels, and was originally designed for an operational short-term ocean forecasting system. Here, it is driven by one multi-decadal cycle of the prescribed JRA55-do atmospheric reanalysis and runoff dataset in order to perform a long-term benchmarking experiment.

To access the accuracy of simulated 3D ocean fields, and highlight the relative benefits of mesoscale activities, the GLOB16 performances are evaluated via a selection of key climate metrics against observational datasets and two other NEMO configurations at lower resolutions: an eddy-permitting resolution (ORCA025) and a non-eddying resolution (ORCA1) designed to form the ocean-sea ice component of the fully coupled CMCC climate model.

The well-known biases in the low-resolution simulations are significantly improved in the high-resolution model. The evolution and spatial pattern of large-scale features (such as sea surface temperature biases and winter mixed layer structure) in GLOB16 are generally better reproduced, and the large-scale circulation is remarkably improved compared to the low-resolution oceans. We find that eddying resolution is an advantage in resolving the structure of western boundary currents, the overturning cells, and flow through key passages. GLOB16 might be an appropriate tool for ocean climate modeling effort, even though the benefit of eddying resolution does not provide unambiguous advances for all ocean variables in all regions.

Journal article(s) based on this preprint

01 Nov 2023
Evaluation of the CMCC global eddying ocean model for the Ocean Model Intercomparison Project (OMIP2)
Doroteaciro Iovino, Pier Giuseppe Fogli, and Simona Masina
Geosci. Model Dev., 16, 6127–6159, https://doi.org/10.5194/gmd-16-6127-2023,https://doi.org/10.5194/gmd-16-6127-2023, 2023
Short summary

Doroteaciro Iovino et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-469', Alexander Shchepetkin, 23 Mar 2023
    • CC2: 'Reply on CC1', Doroteaciro Iovino, 05 Apr 2023
      • CC3: 'Reply on CC2', Alexander Shchepetkin, 05 Apr 2023
        • CC4: 'Reply on CC3', Doroteaciro Iovino, 15 May 2023
  • RC1: 'Comment on egusphere-2023-469', Anonymous Referee #1, 01 May 2023
  • RC2: 'Comment on egusphere-2023-469', Anonymous Referee #2, 19 May 2023

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-469', Alexander Shchepetkin, 23 Mar 2023
    • CC2: 'Reply on CC1', Doroteaciro Iovino, 05 Apr 2023
      • CC3: 'Reply on CC2', Alexander Shchepetkin, 05 Apr 2023
        • CC4: 'Reply on CC3', Doroteaciro Iovino, 15 May 2023
  • RC1: 'Comment on egusphere-2023-469', Anonymous Referee #1, 01 May 2023
  • RC2: 'Comment on egusphere-2023-469', Anonymous Referee #2, 19 May 2023

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Doroteaciro Iovino on behalf of the Authors (14 Aug 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (18 Aug 2023) by Riccardo Farneti
ED: Publish subject to minor revisions (review by editor) (07 Sep 2023) by Riccardo Farneti
AR by Doroteaciro Iovino on behalf of the Authors (13 Sep 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (14 Sep 2023) by Riccardo Farneti
AR by Doroteaciro Iovino on behalf of the Authors (15 Sep 2023)

Journal article(s) based on this preprint

01 Nov 2023
Evaluation of the CMCC global eddying ocean model for the Ocean Model Intercomparison Project (OMIP2)
Doroteaciro Iovino, Pier Giuseppe Fogli, and Simona Masina
Geosci. Model Dev., 16, 6127–6159, https://doi.org/10.5194/gmd-16-6127-2023,https://doi.org/10.5194/gmd-16-6127-2023, 2023
Short summary

Doroteaciro Iovino et al.

Doroteaciro Iovino et al.

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Latest update: 01 Nov 2023
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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
The paper describes the model performance of three global ocean/sea ice configurations, from non-eddying (1°) to eddy-rich (1/16°) resolutions. Model simulations are obtained following the OMIP-2 protocol. We compare key global climate variables across the three models and against observations, emphasizing the relative advantages and disadvantages of running forced ocean–sea ice models at higher resolution.