Table of Contents
1. Real-time forecasts:
The JMA real-time forecasts consist of a 25-member ensemble running every Tuesdays and Wednesdays at 12Z
1.1 case 1: 1 param, 1 date
Retrieving one field (10 meter U wind here) for all time steps and for the forecast starting on 6 January 2015:
1.1.1 Control forecast
| Code Block | ||
|---|---|---|
| ||
#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
"class": "s2",
"dataset": "s2s",
"date": "2015-01-06",
"expver": "prod",
"levtype": "sfc",
"origin": "rjtd",
"param": "165",
"step":
"12/to/804/by/24",
"stream": "enfo",
"target": "CHANGEME",
"time": "12",
"type": "cf",
}) |
1.1.2 Perturbed forecasts
| Code Block | ||
|---|---|---|
| ||
#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
"class": "s2",
"dataset": "s2s",
"date": "2015-01-06",
"expver": "prod",
"levtype": "sfc",
"origin": "rjtd",
"param": "165",
"step":
"12/to/804/by/24",
"stream": "enfo",
"target": "CHANGEME",
"number": "1/to/24",
"time": "12",
"type": "pf",
}) |
1.2 Case 2: 1 param, series of dates
Retrieving 1 field (10m U) for all time steps and for the whole January 2015
1.2.1 Control Forecast
| Code Block | ||
|---|---|---|
| ||
#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
"class": "s2",
"dataset": "s2s",
"date": "2015-01-06/2015-01-07/2015-01-13/2015-01-14/2015-01-20/2015-01-21/2015-01-27/2015-01-28",
"expver": "prod",
"levtype": "sfc",
"origin": "rjtd",
"param": "165",
"step": "12/to/804/by/24",
"stream": "enfo",
"target": "CHANGEME",
"time": "12",
"type": "cf",
}) |
1.2.2 Perturbed forecasts
| Code Block | ||
|---|---|---|
| ||
#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
"class": "s2",
"dataset": "s2s",
"date": "2015-01-06/2015-01-07/2015-01-13/2015-01-14/2015-01-20/2015-01-21/2015-01-27/2015-01-28",
"expver": "prod",
"levtype": "sfc",
"origin": "rjtd",
"param": "165",
"step": "12/to/804/by/24",
"stream": "enfo",
"target": "CHANGEME",
"number": "1/to/24",
"time": "12",
"type": "pf",
}) |
2. Re-forecasts:
The JMA re-forecasts dataset is a "fixed" dataset which means that the re-forecasts are produced once from a "frozen" version of the model and are used for a number of years to calibrate real-time forecast. The JMA re-forecasts consist of a 5-member ensemble running three times a month from 1981 to 2010. The start dates correspond to 1st / 11th and 21st of each month at 00Z minus 12 hours (28 February instead of 29 February). here is the complete list of re-forecast start dates:
...