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The NCEP real-time forecasts consist of a 416-member ensemble run every day. The S2S archive contains all the NCEP real-time forecasts since 1st January 2015.
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Retrieving one field (10 meter U wind here) for all time steps and for the forecast starting on 1st January 2015:
| Code Block | ||
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#!/usr/bin/env python from ecmwfapi import ECMWFDataServer server = ECMWFDataServer() server.retrieve({ "class": "s2", "dataset": "s2s", "date": "2015-01-01", "expver": "prod", "levtype": "sfc", "origin": "kwbc", "param": "165", "step": "24/to/1056/by/24", "stream": "enfo", "target": "CHANGEME", "time": "00", "type": "cf", }) |
| Code Block | ||
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#!/usr/bin/env python from ecmwfapi import ECMWFDataServer server = ECMWFDataServer() server.retrieve({ "class": "s2", "dataset": "s2s", "date": "2015-01-01", "expver": "prod", "levtype": "sfc", "origin": "kwbc", "param": "165", "step": "24/to/1056/by/24", "stream": "enfo", "target": "CHANGEME", "time": "00", |
...
"number": "1/to/15", |
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"type": "pf", |
...
}) |
2. Real-time forecasts: 1 param, series of dates
Retrieving 1 field (10m U wind) for all time steps and for the whole January 2015.
| Code Block | ||
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#!/usr/bin/env python from ecmwfapi import ECMWFDataServer server = ECMWFDataServer() server.retrieve({ "class": "s2", "dataset": "s2s", "date": "2015-01-01/to/2015-01-31", "expver": "prod", "levtype": "sfc", "origin": "kwbc", "param": "165", "step": "24/to/1056/by/24", "stream": "enfo", "target": "CHANGEME", "time": "00", "type": "cf", }) |
| Code Block | ||
|---|---|---|
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#!/usr/bin/env python from ecmwfapi import ECMWFDataServer server = ECMWFDataServer() server.retrieve({ "class": "s2", "dataset": "s2s", "date": "2015-01-01/to/2015-01-31", "expver": "prod", "levtype": "sfc", "origin": "ecmf", "param": "165", "step": "24/to/1056/by/24", "stream": "enfo", "target": "CHANGEME", "time": "00", |
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"number": "1/to/15", |
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"type": "pf", }) |
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3. Re- forecasts
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The NCEP 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 NCEP re-forecasts consist of a 4-member ensemble run every day from 1st January 1999 to 31 December 2010. Because of the large volume of this re-forecast dataset, the NCEP re-forecasts are archived on
a daily basis in the S2S database. Each day, the NCEP re-forecasts corresponding to this day from 1999 to 2010 are archived in the S2S database. This means that the complete NCEP re-forecast database will only be available
at the end of 2015.
As for the other models, NCEP re-forecasts are archived in the S2S database with 2 date attributes:
- hdate which corresponds to the actual starting date of the re-forecast
- Date which correspond tot he ModelVersionDate.Since the NCEP re-forecasts are "fixed" re-forecasts this ModelVersiondate is the same for all the re-forecasts and equal to 20110301. This variable will change when a new version of CFS will be implemented.
1 param, 1 date
Retrieving 1 field (10m U wind) for all time steps and for the 1st January 2000
| Code Block | ||
|---|---|---|
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#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
"class": "s2",
"dataset": "s2s",
"hdate": "20000101", |
...
"date": "2011-03-01", "expver": "prod", "levtype": "sfc", "origin": "kwbc", "param": "165", "step": "24/to/1056/by/24", "stream": "enfh", "target": "CHANGEME", "time": "00", "type": "cf", }) |
| Code Block | ||
|---|---|---|
| ||
#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
"class": "s2",
"dataset": "s2s",
"hdate": "2000-01-01", |
...
"date": "2011-03-01", "expver": "prod", "levtype": "sfc", "origin": "kwbc", "param": "165", "step": "24/to/1056/by/24", "stream": "enfh", "target": "CHANGEME", "time": "00", |
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"number": "1/2/3", |
...
"type": "pf", }) |
...
4. Re- forecasts used to calibrate a real-time forecast:
Retrieving 1 param (10m U wind) for all time steps and used to calibrate the 1st January 2015 real-time forecast
| Code Block | ||
|---|---|---|
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#!/usr/bin/env python from ecmwfapi import ECMWFDataServer server = ECMWFDataServer() server.retrieve({ "class": "s2", "dataset": "s2s", "hdate": "1999- |
...
01-01/2000- |
...
01-01/2001- |
...
01-01/2002- |
...
01-01/2003- |
...
01-01/2004- |
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01-01/2005- |
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01-01/2006- |
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01-01/2007- |
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01-01/2008- |
...
01-01/2009- |
...
01-01/2010- |
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01-01", |
...
"date": "2011-03-01", "expver": "prod", "levtype": "sfc", "origin": "kwbc", "param": "165", "step": "24/to/1056/by/24", "stream": "enfh", "target": "CHANGEME", "time": "00", "type": "cf", }) |
| Code Block | ||
|---|---|---|
| ||
#!/usr/bin/env python from ecmwfapi import ECMWFDataServer server = ECMWFDataServer() server.retrieve({ "class": "s2", "dataset": "s2s", "hdate": "1999- |
...
01-01/2000- |
...
01-01/2001- |
...
01-01/2002- |
...
01-01/2003- |
...
01-01/2004- |
...
01-01/2005- |
...
01-01/2006- |
...
01-01/2007- |
...
01-01/2008- |
...
01-01/2009- |
...
01-01/2010- |
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01-01", |
...
"date": "2011-03-01", "expver": "prod", "levtype": "sfc", "origin": "kwbc", "param": "165", "step": "24/to/1056/by/24", "stream": "enfh", "target": "CHANGEME", |
...
"number": "1/2/3", |
...
...
"time": "00", |
...
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"type": "pf",
}) |