Hi all, Here are the updated proposals for new standard names for CIN, LFC, and LCL; an update to the standard name for CAPE; and the two standard names for the starting and ending heights of lifted parcels.
Following the suggestion that came up in our discussion, these come in pairs: the basic standard name for quantities based on parcels lifted from some starting height (which should be specified as a coordinate variable), and a name ending in _from_the_surface for parcel starting at the surface. Cheers, --Seth ##### original_air_pressure_of_lifted_parcel Various stability and convective potential indices are calculated by "lifting" a parcel of air: moving it dry adiabatically from a starting height (often the surface) to the Lifting Condensation Level, and then wet adiabatically from there to a final height (often the top of the troposphere). original_air_pressure_of_lifted_parcel is the pressure height at the start of lifting. canonical units: Pa ##### final_air_pressure_of_lifted_parcel Various stability and convective potential indices are calculated by "lifting" a parcel of air: moving it dry adiabatically from a starting height (often the surface) to the Lifting Condensation Level, and then wet adiabatically from there to an ending height (often the top of the troposphere). final_air_pressure_of_lifted_parcel is the pressure height at the end of lifting. canonical units: Pa ##### atmosphere_specific_convective_inhibition "Specific" means per unit mass. Convective inhibition is the amount of energy required to overcome the negatively buoyant energy exerted by the environment on a parcel of air. Convective inhibition is often abbreviated as "CIN" or "CINH". It is calculated by integrating the negative temperature difference between the surrounding atmosphere and a parcel of air lifted adiabatically from a given starting height to its equilibrium level. A coordinate variable of original_air_pressure_of_lifted_parcel should be specified to indicate the starting height of the lifted parcel. canonical units: J kg-1 ##### atmosphere_specific_convective_inhibition_from_the_surface Convective inhibition is the amount of energy required to overcome the negatively buoyant energy exerted by the environment on a parcel of air. Convective inhibition is often abbreviated as "CIN" or "CINH". It is calculated by integrating the negative temperature difference between the surrounding atmosphere and a parcel of air lifted adiabatically from the surface to its equilibrium level. "Specific" means per unit mass. canonical units: J kg-1 ##### atmosphere_lifting_condensation_level The lifting condensation level is the height at which the relative humidity of an air parcel cooled by dry adiabatic lifting would reach 100%. A coordinate variable of original_air_pressure_of_lifted_parcel should be specified to indicate the starting height of the lifted parcel. canonical units: m ##### atmosphere_lifting_condensation_level_from_the_surface The lifting condensation level is the height at which the relative humidity of an air parcel cooled by dry adiabatic lifting from the surface would reach 100%. canonical units: m ##### atmosphere_level_of_free_convection The level of free convection is the altitude where the temperature of the environment decreases faster than the moist adiabatic lapse rate of a saturated air parcel at the same level. It is calculated by lifting a parcel of air dry adiabatically to the LCL (lifting condensation level), then moist adiabatically until the parcel temperature is equal to the ambient temperature. A coordinate variable of original_air_pressure_of_lifted_parcel should be specified to indicate the starting height of the lifted parcel. canonical units: m ##### atmosphere_level_of_free_convection_from_the_surface The level of free convection is the altitude where the temperature of the environment decreases faster than the moist adiabatic lapse rate of a saturated air parcel at the same level. It is calculated by lifting a parcel of air dry adiabatically from the surface to the LCL (lifting condensation level), then moist adiabatically until the parcel temperature is equal to the ambient temperature. canonical units: m ##### [update to existing standard_name] atmosphere_specific_convective_available_potential_energy Convective(ly) available potential energy (often abbreviated CAPE) is a stability measure calculated by integrating the positive temperature difference between the surrounding atmosphere and a parcel of air lifted adiabatically from a given starting height to its equilibrium level. A coordinate variable of original_air_pressure_of_lifted_parcel should be specified to indicate the starting height of the lifted parcel. "Specific" means per unit mass. Potential energy is the sum of the gravitational potential energy relative to the geoid and the centripetal potential energy. (The geopotential is the specific potential energy.) canonical units: J kg-1 ##### atmosphere_specific_convective_available_potential_energy_from_the_surface Convective(ly) available potential energy (often abbreviated CAPE) is a stability measure calculated by integrating the positive temperature difference between the surrounding atmosphere and a parcel of air lifted adiabatically from the surface to its equilibrium level. "Specific" means per unit mass. Potential energy is the sum of the gravitational potential energy relative to the geoid and the centripetal potential energy. (The geopotential is the specific potential energy.) canonical units: J kg-1 ##### _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata