1.3 CMOR Variable: Global Mean Mole Fraction of CH4 (ch4globalClim)

Record Label : ch4globalClim

Record Title : Global Mean Mole Fraction of CH4

Record Identifier : a92e3b16-817c-11e6-a4e2-5404a60d96b5

Link to a record specifying the structure of the variable : str-a449

MIP Variable : ch4global

Deflate: NetCDF compression parameter :

Deflate Level: NetCDF compression parameter :

Shuffle: NetCDF compression parameter :

Indicative priority for this parameter, which is over-ruled by the requestVar priority setting, but provides a reference for organisation of the CMORvariables : 1

Data value type, e.g. float or double : real

Modeling Realm : atmos atmosChem

CMOR Directive Positive :

Section of a table : Amon_oth

Link to MIP table record : Amon

The MIP table : Amon

Provenance : Amon ((isd.003))

Processing Notes : Report only for simulations (e.g., prescribed concentration pi-control run), in which the CH4 does not vary from one year to the next. Report 12 monthly values, starting with January, even if the values do not vary seasonally. When calling CMOR, identify this variable as ch4globalClim, not ch4global. If CH4 is spatially nonuniform, omit this field, but report Global Mean Mole Fraction of CH4 (see the table entry before the previous one). Are these the preferred units or should it be a unitless fraction? Should this field be reported instead on model levels? Or should we also require either the vertically integrated mole fraction (or mass?) of this species or the vertically integrated globally averaged mole fraction (or mass?)?

Provenance Note : Amon_oth

Frequency of Time Steps to be Archived : monC

Row index of entry in source sheet : 78

Description : Global Mean Mole Fraction of CH4

Request variable (carrying priority and link to group) :