Back to variables | Category Index
Each Output variable record corresponds to a physical parameter specification.
| Attribute | Value |
|---|---|
| branded_variable_name | ch4_tavg-u-hm-u |
| cell_methods | undef |
| cmip6_frequency | mon |
| cmip6_tables_identifier | Amon (Monthly atmospheric data) |
| cmip7_compound_name | atmosChem.mon.ch4_tavg-u-hm-u |
| cmip7_frequency | mon |
| conditional | True |
| description | Global Mean Mole Fraction of CH4 |
| dimensions | time |
| flag_-_variable_change_since_cmip6 | True |
| modelling_realm | Atmospheric Chemistry |
| name | Amon.ch4global |
| physical_parameter | ch4global (Global Mean Mole Fraction of CH4) |
| processing_note | For some simulations (e.g., prescribed concentration pi-control run), this will not vary from one year to the next, and so report instead the variable described in the next table entry. If CH4 is spatially nonuniform, omit this field, but report 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?)? CHANGE SINCE CMIP6 in Units (from Physical Parameter) - CMIP6:1.00E-09 CMIP7:1E-09, CHANGE SINCE CMIP6 in Cell Methods - CMIP6:area: time: mean CMIP7:height: sum (through atmospheric column) area: sum time: mean, CHANGE SINCE CMIP6 in Modeling Realm - primary - CMIP6:atmos, atmosChem CMIP7:atmosChem, CHANGE SINCE CMIP6 in Cell Methods - CMIP6:area: time: mean CMIP7:height: area: time: mean (with all samples weighted by the number of moles of air in the sample), |
| provenance | Amon ((isd.003)) |
| spatial_shape | na-na (Global mean or constant) |
| temporal_shape | time-intv (Temporal Interval) |
| title | Global Mean Mole Fraction of CH4 |
| type | real |
| uid | baa9e22c-e5dd-11e5-8482-ac72891c3257 |