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Technical details of the new cycle
Changes to GRIB encoding
Model identifiers
The GRIB model identifiers (generating process identification number) for cycle 46R1 will be changed as follows:
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New model output parameters
| paramId | shortName | name | units | GRIB edition | Components | Test data available |
|---|
Model levels |
|---|
| 210247 | aermr16 | Nitrate fine mode aerosol mass mixing ratio | kg kg-1 | 2 | CAMS aerosol model |
TBC| yes |
| 210248 | aermr17 | Nitrate coarse mode aerosol mass mixing ratio | kg kg-1 | 2 | CAMS aerosol model |
TBC| yes |
210249 | aermr18 | Ammonium aerosol mass mixing ratio | kg kg-1 | 2 | CAMS aerosol model |
TBC| yes |
| Pressure levels |
|---|
| 210247 | aermr16 | Nitrate fine mode aerosol mass mixing ratio | kg kg-1 | 1 | CAMS aerosol model |
TBC| yes |
| 210248 | aermr17 | Nitrate coarse mode aerosol mass mixing ratio | kg kg-1 | 1 | CAMS aerosol model |
TBC| yes |
| 210249 | aermr18 | Ammonium aerosol mass mixing ratio | kg kg-1 | 1 | CAMS aerosol model |
TBC| yes |
Surface level |
|---|
| 210250 | niaod550 | Nitrate aerosol optical depth at 550 nm | dimensionless | 1 | CAMS aerosol model |
TBC| yes |
| 210251 | amaod550 | Ammonium aerosol optical depth at 550 nm | dimensionless | 1 | CAMS aerosol model |
TBC
New model output parameters
Discontinued model parameters
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Similarly, the sulfate tracer in the chemistry scheme (so4/217020 and related diagnostic tcso4/218020) is no longer used, as the chemistry now uses the same sulfate tracer as the aerosol (aermr11/210011).
| Old species | Old grib code | New species | New grib code |
|---|
| SO2 aerosol precursor | aermr12 - 210012 | SO2 | so2 - 210122 |
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Software
ecCodes
ecCodes version 2.12.1 provides full support for the new CAMS model output parameters introduced in IFS Cycle 46r1.
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