Representation of sub-grid-scale eddy and mixed-layer processes


Unresolved process parameterization.

People

David Ferreira,
Raffaele Ferrari,
Baylor Fox-Kemper,
John Marshall
and Chris Hill

Project Description

Eddying solutions from ECCO2 experiments are being used by members of the Climate Process Team on Eddy Mixed Layer Interactions to diagnose fluxes of heat and buoyancy due to eddy processes in the global oceans. Results (such as the diagnosed eddy heat and temperature transports shown in the figures below) are being compared against observations, theoretical models and against very high-resolution process models. This work is leading to a more complete understanding of the role ocean eddies and mixed-layer processes play in setting the global ocean state.

Zonal average of the meridional eddy flux of temperature diagnosed from two years of the ECCO2 1/8th degree, isotropic grid MITgcm simulation.


Vertically and zonally integrated heat flux for the full water column and for the upper 200m. Diagnosed from two years of the ECCO2 1/8th degree, isotropic grid MITgcm simulation.


Total poleward heat transport diagnosed from two years of the ECCO2 1/8th degree, isotropic grid MITgcm simulation (red line) and observational estimates with associated errors (black lines).

The application of ECCO2 high-resolution solutions can be seen in this climate process team presentation in which eddy transports from the explcitly resolved model are compared against existing and new parameterizations.