Find on in this page technical specification of the required input data and processing workflow.
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Parameters
Output type: forecast
only one forecast product per centre is expected for
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verification - the best available one for the common inter-comparison
- Output time: 00 and , 6, 12, 18 UTC (depending on availability)
Output frequency: the model output steps should be between 1 and 12 hours
Output type: forecast
- Domain: regular latitude‐longitude grid at the resolution best matching the native resolution of the direct model output
6 hours (including step 0 encoded as forecast type as well)
- the model output steps should be the shortest available
- Wave parameters should be obtained from the full 2-D spectrum (we stress this fact as there seems to be some confusion about wave parameters' names and definitions even in the latest WMO GRIB2 code tables)
| name | units | paramId*1 | shortName*1 | |||
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Atmospheric forcing | ||||||
| Name | units | |||||
| 10 metre U wind component | m/s | 165 | 10u | |||
| 10 metre V wind component | m/s | |||||
| Wave Fields: | m | |||||
| 166 | 10v | |||||
| Wave fields | Mean wave direction | degree true | 140230 | mwd | s | |
| Mean zero-crossing wave period | s | 140221 | mp2 | |||
| Peak wave period | s | 140231 | pp1d | |||
| Significant height of combined wind waves and swell | m | 140229 | swhdegree true |
- Follow the links for exact GRIB2 WMO compliant definitions
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- *1 valid in ECMWF's ecCodes only
Encoding
All details about the required input files including sample data format can be found in the page Encoding details.
Sample data
- Providers are asked to provide full sample data from one model run containing all expected parameters, steps, forecast types etc.
- Naming convention for sample data:
wave_<Organization_acronym><centre WMO origin>_<YYYYMMDDRR>_<prod/test>_<an/fc>fc.grib2
acronym listed in the table in the page GRIB data for WMO LC-WFV
prod/test ... production or test version of the data
an/fc ... analysis or forecastforecast (step 0 should be also encoded as of forecast type) - Merge all parameters from all steps for given model run and output type into one file:
e.g. wave test forecasts from ECMWF on the 1st of September 2017, 12Z => wave_ECMWFecmf_2017090112_test_fc.grib2 - Put sample data on ecgate to a directory with reading permission
- alternatively use any other downloadable location (e.g. google drive)
alternatively use this ftp (quota only 10 GB)::
Show If special @anonymous Alert Log in to see ftp details
Show If special @authenticated Code Block host: ftp.ecmwf.int user: observations passwd: observations2013 directory: wave
- The naming convention for future production data might change
Production data acquisition
- The data will be pulled via ftp from an agreed server location at the data producer's site.
- The ECMWF's acquisition system will be used for handling the production data exchange.
- Participants are committed to guarantee a steady and reliable provision of their data and to communicate any relevant changes.
- The support mailing list on provider's side will be required to allow smooth communication related to common production issues in the future.
Models description
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suiteName *4
(centre + model + domain)
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Runs [UTC]
(0/12 only)
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Last step
[h]
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Fcst step
[h]
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Resolution
[º]
(lat x lon if not the same)
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Domain
[lat, lon]
(of the first and last grid point)
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Domain size
[#lat x #lon]
(#total points)
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[GB]
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European Centre for Medium-Range Weather
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ecmf-wam-glob
ecmf-saw-glob
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3 (0-144)
6 (150-240)
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[90.0,0] [-90,359.875]
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1441 x 2880
(4150080)
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[80.03906S,0.17578125E] [80.03906N,359.82422E]
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[ 90.0,0] [90,359.5]
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[ 90.0,0] [90,359.75]
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1 (0-120)
3 (123-180)
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0.5 (base grid)
0.067-0.167 (regional/coastal mosaics)
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[-90.0,0] [90,359.5]
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[90.0,0] [ -90,359.8]
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edzw-wam-gwam
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[89.25,0] [-85.25,359.75]
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[66,-10.50] [30,42]
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Contact
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Contact Richard Mladek for any further details, sample data exchange etc. |
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Contact |
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[-78,-180] [80,179.5]
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0, 12,
84
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[75,0] [-75,359.5]
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National Institute of Water and Atmospheric Research, New Zealand
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0.15625 x 0.234375
(10/64 x 15/64)
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[-81.25,0] [81.25,359.765625]
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Det Norske Meteorologiske Institutt, Norway
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Servicio de Hidrografía Naval, Servicio Meteorológico, Argentina
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[65,-180] [-80,179]
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New Zealand MetService
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(1) number defined but not name in eccodes
(2) not defined yet in eccodes at all
(3) both runs, 6 parameters, all steps, forecast only
(4) ECMWF ECCODES only (GRIB2 local section 2 for MARS archiving purposes)
Contact
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Richard Mladek for any further details, sample data exchange etc. |
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