Created: March 20, 2016

Proposer: Jonathan Gregory / Stephen Griffies

Proposed Date: 2015-01-30

CMIP6 - OMIP

Change Date: March 20, 2016, 11:15 p.m.

Term: **tendency_of_sea_water_potential_temperature_expressed_as_heat_content_due_to_parameterized_mesoscale_diffusion**

Unit: W m-2

Unit ref: UFAA

AMIP:

GRIB:

"Content" indicates a quantity per unit area. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "tendency_of_X" means derivative of X with respect to time. This tendency expresses the time change in model heat content in a grid cell due to parameterized mesoscale eddy diffusive processes (e.g., neutral diffusion in the interior and horizontal diffusion in the surface boundary layer) impacting the heat content, with this tendency measured by models using potential temperature as the prognostic model field.

Change Date: Oct. 11, 2017, 10:27 p.m.

Term: **tendency_of_sea_water_potential_temperature_expressed_as_heat_content_due_to_parameterized_mesoscale_eddy_diffusion**

Unit: W m-2

Unit ref: UFAA

AMIP:

GRIB:

Change Date: Oct. 11, 2017, 10:40 p.m.

Term: **tendency_of_sea_water_potential_temperature_expressed_as_heat_content_due_to_parameterized_mesoscale_eddy_diffusion**

Unit: W m-2

Unit ref: UFAA

AMIP:

GRIB:

"Content" indicates a quantity per unit area. The phrase "tendency_of_X" means derivative of X with respect to time. Potential temperature is the temperature a parcel of air or sea water would have if moved adiabatically to sea level pressure. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Parameterized mesoscale eddy diffusive processes include diffusion along neutral density surfaces in the interior of the ocean and horizontal diffusion in the surface boundary layer.

Change Date: Nov. 27, 2017, 7:58 p.m.

Term: **tendency_of_sea_water_potential_temperature_expressed_as_heat_content_due_to_parameterized_mesoscale_eddy_diffusion**

Unit: W m-2

Unit ref: UFAA

AMIP:

GRIB:

The phrase "tendency_of_X" means derivative of X with respect to time. "Content" indicates a quantity per unit area. The phrase "expressed_as_heat_content" means that this quantity is calculated as the specific heat capacity times density of sea water multiplied by the potential temperature of the sea water in the grid cell. Potential temperature is the temperature a parcel of air or sea water would have if moved adiabatically to sea level pressure. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Parameterized mesoscale eddy diffusive processes include diffusion along neutral directions in the interior of the ocean and horizontal diffusion in the surface boundary layer. The processes occur on a spatial scale of many tens of kilometres and an evolutionary time of weeks.