Change Date: Sept. 15, 2021, 1:33 p.m.

Term: dry_mole_fraction_of_methane_in_air

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

Change Date: Sept. 15, 2021, 1:34 p.m.

Term: dry_mole_fraction_of_methane_in_air

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

"Mole fraction" is used in the construction "mole_fraction_of_X_in_Y", where X is a material constituent of Y. A chemical species or biological group denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The chemical formula for methane is CH4. Methane is a member of the group of hydrocarbons known as alkanes. There are standard names for the alkane group as well as for some of the individual species.

Change Date: Sept. 15, 2021, 2:31 p.m.

Term: mole_fraction_of_methane_in_dry_air

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

"Mole fraction" is used in the construction "mole_fraction_of_X_in_Y", where X is a material constituent of Y. A chemical species or biological group denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The chemical formula for methane is CH4. Methane is a member of the group of hydrocarbons known as alkanes. There are standard names for the alkane group as well as for some of the individual species.

Change Date: Sept. 15, 2021, 2:31 p.m.

Term: mole_fraction_of_methane_in_dry_air

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

"Mole fraction" is used in the construction "mole_fraction_of_X_in_Y", where X is a material constituent of Y. A chemical species or biological group denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The phrase "in_dry_air" means that the quantity is calculated as the number of particles of X divided by the number of dry air particles, i.e. the effect of water vapor is excluded. The chemical formula for methane is CH4. Methane is a member of the group of hydrocarbons known as alkanes. There are standard names for the alkane group as well as for some of the individual species.