height_above_geopotential_datum_at_top_of_atmosphere_model

complete

Created: Feb. 8, 2017

Proposer: Jonathan Gregory

Proposed Date: 2015-09-06

CF trac ticket 143 has been agreed.

CF trac ticket 143

Change Date: Feb. 8, 2017, 4:09 p.m.

Term: height_above_geopotential_datum_at_top_of_atmosphere_model

Unit: m

Unit ref: ULAA

AMIP:

GRIB:

Change Date: May 18, 2017, 9:43 a.m.

Term: height_above_geopotential_datum_at_top_of_atmosphere_model

Unit: m

Unit ref: ULAA

AMIP:

GRIB:

"Top of atmosphere model" means the upper boundary of the top layer of an atmosphere model. The "geopotential datum" is the geopotential reference level (level of zero geopotential) where this is not a specifically named level such as the geoid or a reference ellipsoid.

Change Date: May 18, 2017, 9:43 a.m.

Term: height_above_geopotential_datum_at_top_of_atmosphere_model

Unit: m

Unit ref: ULAA

AMIP:

GRIB:

Height is a measure of vertical distance. "Top of atmosphere model" means the upper boundary of the top layer of an atmosphere model. The "geopotential datum" is the geopotential reference level (level of zero geopotential) where this is not a specifically named level such as the geoid or a reference ellipsoid.

Change Date: May 18, 2017, 9:59 a.m.

Term: height_above_geopotential_datum_at_top_of_atmosphere_model

Unit: m

Unit ref: ULAA

AMIP:

GRIB:

"Height_above_X" means the vertical distance above the named surface X. The "geopotential datum" is the geopotential reference level (level of zero geopotential) where this is not a specifically named level such as the geoid or a reference ellipsoid. "Top of atmosphere model" means the upper boundary of the top layer of an atmosphere model.

Change Date: July 4, 2017, 2:13 p.m.

Term: height_above_geopotential_datum_at_top_of_atmosphere_model

Unit: m

Unit ref: ULAA

AMIP:

GRIB:

"Height_above_X" means the vertical distance above the named surface X. "Top of atmosphere model" means the upper boundary of the top layer of an atmosphere model.

Change Date: July 4, 2017, 2:14 p.m.

Term: height_above_geopotential_datum_at_top_of_atmosphere_model

Unit: m

Unit ref: ULAA

AMIP:

GRIB:

"Height_above_X" means the vertical distance above the named surface X. The "geopotential datum" is any estimated surface of constant geopotential used as a datum i.e. a reference level; for the geoid as a datum, specific standard names are available. To specify which geoid or geopotential datum is being used as a reference level, a grid_mapping variable should be attached to the data variable as described in Chapter 5.6 of the CF Convention. "Top of atmosphere model" means the upper boundary of the top layer of an atmosphere model.