Back to variables | Category Index
Each Output variable record corresponds to a physical parameter specification.
| Attribute | Value |
|---|---|
| cell_measures | area: areacella |
| cell_methods | amn-tpt (Area Mean Instantaneous) |
| cmip6_frequency | 3hrPt |
| cmip6_tables_identifier | CF3hr (3-hourly associated with cloud forcing) |
| cmip7_frequency | 3hr |
| description | The surface called "surface" means the lower boundary of the atmosphere. "longwave" means longwave radiation. Downwelling radiation is radiation from above. It does not mean "net downward". When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. |
| dimensions | longitude, latitude, time1 |
| modelling_realm | Atmospheric |
| name | CF3hr.rlds |
| physical_parameter | rlds (Surface Downwelling Longwave Radiation) |
| positive_direction | down |
| processing_note | CHANGE SINCE CMIP6 in CMIP7 Frequency - CMIP6:3hrPt CMIP7:3hr, Changes since reverted/fixed. Variable now matches CMIP6 definition. |
| provenance | CFMIP (CMIP5) |
| spatial_shape | XY-na (Global field (single level)) |
| temporal_shape | time-point (Instantaneous Value (i.e. Synoptic or Time-Step Value)) |
| title | Surface Downwelling Longwave Radiation |
| type | real |
| uid | e0ab54ac-4b7f-11e7-903f-5404a60d96b5 |