Please refer to the Milestone note for DE-EDT-5-22.M2 for full details on the usage of the Polytope service to retrieve DestinE data from the archive.
Below are several examples of key-value pairs which would be used as the "request" within the polytope service.
Surface fields
Retrieve "Sea ice area fraction" (param 31; grid O8000) and "Sea surface temperature" (param 34; grid O8000) at step 0 (0 hours after run start: 2018-11-01, 00:00:00):
| Code Block |
|---|
request = {
'class' : 'rd',
'date' : '2018-11-01',
'expver' : 'hs3g',
'levtype' : 'sfc',
'param' : '31/34',
'step' : '0',
'stream' : 'oper',
'time' : '00:00:00',
'type' : 'fc'
} |
Model level fields
Retrieve "Pressure" (param 54; grid TCO7999) for the lowest 10 model levels at step 6 (6 hours after run start: 2018-11-01, 06:00:00):
| Code Block |
|---|
request = {
'class' : 'rd',
'date' : '2018-11-01',
'expver' : 'hs3g',
'levelist': '128/to/137',
'levtype' : 'ml',
'param' : '54',
'step' : '6',
'stream' : 'oper',
'time' : '00:00:00',
'type' : 'fc'
} |
Pressure level fields
Retrieve "Specific humidity" (param 133; grid O8000) for the lowest 10 pressure levels at step 24 (24 hours after run start: 2018-11-02, 00:00:00):
| Code Block |
|---|
request = {
'class' : 'rd',
'date' : '2018-11-01',
'expver' : 'hs3g',
'levelist': '150/200/250/300/400/500/700/850/925/1000',
'levtype' : 'pl',
'param' : '133',
'step' : '24',
'stream' : 'oper',
'time' : '00:00:00',
'type' : 'fc'
} |
Additional request keywords
| Warning | ||
|---|---|---|
| ||
Please note that the following keywords can be used only on data on the TCO7999 spectral grid. Please see the data catalogue for more information |
See the milestone note DE-EDT-5-22.M2 for other keywords which can be used to retrieve parameters on the spectral TCO7999 grid only at a coarsened resolution or for a reduced area. For example:
- To use a coarsened 1° x 1° lat/long grid, use the keyword:
'grid' : '1.0/1.0'
To extract data for a given area, for example Europe, use the keyword:
'area' : '73.5/-27/33/45'