Convective available potential energy
| Name: | convective_available_potential_energy | Abbreviation: | cape | Unit: | J kg-1 |
| Definition | Amount of potential energy an air parcels acquires when lifted adiabatically from its lifting condensation level to the level of neutral bouyancy. |
| Validity | Daily averaged |
| Comment | Computed from instantaneous values at 00, 06, 12 and 18Z |
To identify the data as S2S, the variable productionStatusOfProcessedData (Section 1, Code table 3) needs to be set up as:
- 6 Sub-seasonal to seasonal prediction project (S2S)
- 7 Sub-seasonal to seasonal prediction project (S2S) test
| Parameter | ||
|---|---|---|
| Discipline | = 0 | Meteorological products |
| Parameter Category | = 7 | Thermodynamic stability indices |
| Parameter Number | = 6 | Convective available potential energy |
| Level | ||
|---|---|---|
| Type of first fixed surface | = 1 | Ground or water surface |
| Scale factor of first fixed surface | = all bits to 1 | Missing |
| Scaled value of first fixed surface | = all bits to 1 | Missing |
| Type of second fixed surface | = 8 | Nominal top of the atmosphere |
| Scale factor of second fixed surface | = all bits to 1 | Missing |
| Scaled value of second fixed surface | = all bits to 1 | Missing |
The GRIB2 coding of daily averages is explained here
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