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Table of Contents |
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Parameters
Output type: forecast
only one forecast product per centre is expected for verification - the best available one for the common inter-comparison
- Output time:00 and , 6, 12, 18 UTC (depending on availability)
Output frequency: between 1 and 6 hours (including step 0 encoded as forecast type as well)
- the model output steps should be the shortest available
Output type: forecast
only one forecast product per centre is expected for verification - the best available one for the common inter-comparison
- 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 data format can be found in the page Encoding details.
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- 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>_<YYYYMMDDRR>_<prod/test>_<an/fc>fc.grib2
acronym listed in the table below
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_ECMWF_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:
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
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