The GFDL Global Ocean and Sea Ice Model OM4.0: Model Description and Simulation Features
By Alistair Adcroft, W. Anderson, V. Balaji, C. Blanton, Mitchell Bushuk, C. Dufour, J. Dunne, S. Griffies, Robert Hallberg, M. Harrison and 19 more. Journal of Advances in Modeling Earth Systems, 2019
383 citations recorded by the source corpus.
We document the configuration and emergent simulation features from the Geophysical Fluid Dynamics Laboratory (GFDL) OM4.0 ocean/sea ice model. OM4 serves as the ocean/sea ice component for the GFDL climate and Earth system models. It is also used for climate science research and is contributing to the Coupled Model Intercomparison Project version 6 Ocean Model Intercomparison Project. The ocean component of OM4 uses version 6 of the Modular Ocean Model and the sea ice component uses version 2 of the Sea Ice Simulator, which have identical horizontal grid layouts (Arakawa C‐grid). We follow the Coordinated Ocean‐sea ice Reference Experiments protocol to assess simulation quality across a broad suite of climate‐relevant features. We present results from two versions differing by horizontal grid spacing and physical parameterizations: OM4p5 has nominal 0.5° spacing and includes mesoscale eddy parameterizations and OM4p25 has nominal 0.25° spacing with no mesoscale eddy parameterization. Modular Ocean Model version 6 makes use of a vertical Lagrangian‐remap algorithm that enables general vertical coordinates. We show that use of a hybrid depth‐isopycnal coordinate reduces the middepth ocean warming drift commonly found in pure z* vertical coordinate ocean models. To test the need for the mesoscale eddy parameterization used in OM4p5, we examine the results from a simulation that removes the eddy parameterization. The water mass structure and model drift are physically degraded relative to OM4p5, thus supporting the key role for a mesoscale closure at this resolution.
Subfields: Atmospheric Science, Environmental Chemistry, Oceanography
View Paper: https://www.semanticscholar.org/paper/dd989c22ea34898dc8f90971e36beb4eae388995
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In Atmospheric Science
- Robert Hallberg
- S. Griffies
- Andrew T. Wittenberg
- A. Rosati
- L. Harris
- I. Held
- T. Delworth
- Shian‐Jiann Lin
In Environmental Chemistry
In Oceanography
- Robert Hallberg
- S. Griffies
- B. Fox‐Kemper
- L. Harris
- Alistair Adcroft
- Shian‐Jiann Lin
- I. Held
- Andrew T. Wittenberg
Citations in the corpus
- SPEAR: The Next Generation GFDL Modeling System for Seasonal to Multidecadal Prediction and Projection (2020, methodology): “Second, similar to OM4, the SPEAR ocean component uses a parameterization of the effects of submesoscale eddies (Adcroft et al., 2019).”
- Resolving and Parameterising the Ocean Mesoscale in Earth System Models (2020, methodology): “The Rossby radius length scale is key to the representation of mesoscale eddies, boundary currents and fronts, and topographic flows [15, 18].”
- The GFDL Earth System Model Version 4.1 (GFDL‐ESM 4.1): Overall Coupled Model Description and Simulation Characteristics (2020, methodology): “The primary sources of this improved fidelity are improved representation of the relatively poleward onset of convective deep mixing in the North Atlantic, Southern Ocean, and North Pacific [Adcroft et al., 2019].”
- Structure and Performance of GFDL's CM4.0 Climate Model (2019, methodology): “However, as shown in Adcroft et al. (2019), the hybrid vertical ocean coordinate employed in CM4.”