High-fidelity 4D data representing Contrail forcing index values on axes of latitude, longitude, altitude, and time.
Data format
Grids are in NetCDF4 format.
These grids cover the whole globe as a quarter-degree grid, in which latitude and longitude steps are 0.25 degrees. Each grid is forecasted for a full hour (UTC).
Contrail forcing index values range from 0 to 4, from no significant warming to severe contrail warming.
Grid dimensions
| Name | Type | Description |
|---|---|---|
longitude |
float32 |
-180 to +180 (inclusive), as configured in the request. Grid resolution is 0.25 degrees. |
latitude |
float32 |
-90 to +90 (inclusive), as configured in the request. Grid resolution is 0.25 degrees. |
flight_level |
int16 |
[270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440], as configured in the request, in hectofeet. Flight levels are derived from pressure levels. |
time |
datetime64[ns] |
The requested real world forecast date and time, in UTC. |
forecast_reference_time |
datetime64[ns] |
Date and time at which the forecast was computed, rather than the time of forecast itself, in UTC. |
Data variables
You can request the following data variables:
Contrail forcing index values
contrails (float32): (longitude, latitude, flight_level, time) Continuous
contrail forcing index values from [0 - 4].
Severity values can be interpreted as:
| Value | Interpretation |
|---|---|
| 0 | None |
| 1 | Low (light) |
| 2 | Moderate |
| 3 | High (severe) |
| 4 | Extreme |
Persistent contrail formation probability
persistent_formation_probability (float32): (longitude, latitude,
flight_level, time) Estimated persistent contrail formation probability,
ranging from 0 to 100.
Practically, due to conservative model calibration, values only range from 0 to 40.
Nominal CoCiP effective energy forcing
nominal_cocip_effective_energy_forcing (float32): (longitude, latitude,
flight_level, time) Estimated effective energy forcing provided by the
CoCiP model on the nominal IFS weather forecast (no ensembles). This value
includes the applied effective radiative forcing over radiative forcing ratio
of 0.42.