Dear list,
I would like to propose a small number of additional cloud related
variables for use in CMIP5/CFMIP2.
1/ Additional cloud condensate tendencies (see
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2009/002730.html )
tendency_of_mass_fraction_of_stratiform_cloud_liquid_water_in_air_due_convective_detrainment (s-1)
tendency_of_mass_fraction_of_stratiform_cloud_ice_in_air_due_convective_detrainment (s-1)
2/ I would like to propose aliases for the following variables:
tendency_of_air_temperature_due_to_large_scale_precipitation
to have a new alias
tendency_of_air_temperature_due_to_stratiform_cloud_condensation_and_evaporation
The 'stratiform' makes this more consistent with other cloud variables already
agreed by the list (see for example
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2009/002812.html and
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2009/002730.html )
Also, 'condensation_and_evaporation' replaces 'precipitation' because latent
heating is the process which affects temperature, while precipitation can
occur without latent heat release (e.g. cloud droplets becoming rain drops)
Equivalently I propose that
tendency_of_specific_humidity_due_to_large_scale_precipitation (s-1)
should nave a new alias
tendency_of_specific_humidity_due_to_stratiform_cloud_condensation_and_evaporation
In both cases CMIP5 would use the new alias.
3/ New eddy diffusivity variables:
eddy_viscosity_coefficients_for_momentum_variables (m2 s-1)
eddy_diffusivity_coefficients_for_temperature_variable (m2 s-1)
eddy_diffusivity_coefficients_for_water_variables (m2 s-1)
4/ Atmospheric convective mass fluxes
Extensions to the existing atmosphere_convective_mass_flux definition:
atmosphere_updraught_convective_mass_flux kg m-2 s-1
Calculate as the convective mass flux divided by the area of the
whole grid cell (not just the area of the cloud).
atmosphere_downdraught_convective_mass_flux kg m-2 s-1
Calculate as the convective mass flux divided by the area of the
whole grid cell (not just the area of the cloud).
atmosphere_shallow_convective_mass_flux kg m-2 s-1
For models with a distinct shallow convection scheme, calculate
as the convective mass flux divided by the area of the whole grid
cell (not just the area of the cloud).
atmosphere_deep_convective_mass_flux kg m-2 s-1 For models
with a distinct deep convection scheme, calculate as the convective
mass flux divided by the area of the whole grid cell (not just the
area of the cloud).
Thank you,
Mark Webb
Received on Thu Jul 02 2009 - 01:03:30 BST
