Difference between revisions of "3. Data types and format"

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'''Data types'''
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The '''M'''eteorological '''A'''rchival and '''R'''etrieval '''S'''ystem (MARS) is the main repository of meteorological data at ECMWF. It contains terabytes of operational and research data as well as data from Special Projects.
  
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MARS data is available to registered users in the Member States and Co-operating States (see [http://www.ecmwf.int/en/computing/access-computing-facilities [1]]).
  
'''Reanalysis:'''
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Free downloadable datasets can be access via [http://apps.ecmwf.int/datasets/ ECMWF Data server].
  
'''ERA-15'''
 
  
 reanalyses from 12/1978 to 02/1994
 
  
 spectral T106 resolution with 31 vertical hybrid levels
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'''REANALYSIS:'''
 
 
 
 
'''ERA-40'''
 
 
 
 reanalyses from mid-1957 to 2001
 
 
 
 T159 spectral resolution with 60 vertical levels
 
  
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'''ERA-15'''
  
'''ERA-interim'''
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- reanalyses from 12/1978 to 02/1994
  
 reanalyses from 01/1979 up to 3 months ago
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- spectral T106 resolution with 31 vertical hybrid levels
  
 T255 spectral resolution with 60 vertical levels
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<br/>'''ERA-40'''
  
 corrected for different models so should be consistent
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- reanalyses from mid-1957 to 2001
  
 useful for long term analyses
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- T159 spectral resolution with 60 vertical levels
  
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<br/>'''ERA-interim'''
  
'''Forecast:'''
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- reanalyses from 01/1979 up to 3 months ago
  
Operational data
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- T255 spectral resolution with 60 vertical levels
• data up to 2 days ago
 
  
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- corrected for different models so should be consistent
  
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- useful for long term analyses
  
'''Data format:'''
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<br/>The Re-analysis data are publicly available via [http://apps.ecmwf.int/datasets/ http://apps.ecmwf.int/datasets/]
  
GRIB1
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One does not need to be an authorized user but only register.
  
GRIB2 was implemented on 18 May 2011
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The public ERA-40 data are not the high-resolution data, and the public ERA-Interim data are not including all fields.
  
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<br/>'''FORECAST:'''
  
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Operational data - data up to 2 days ago
  
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Contains forecasts/analysis (GRIB format) as well as observations (BUFR format) and observation feedbacks (ODB format).
  
  
  
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'''DATA FORMAT:'''
  
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- GRIB1
  
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- GRIB2 was implemented on 18 May 2011.
  
Back to ECMWF overview[http://muspelheim.nilu.no/w/index.php/ECMWF]
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Information on the GRIB2 migration can be found [https://software.ecmwf.int/wiki/display/GRIB/GRIB+API here].
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[[Category:Tools]][[Category:Models]][[Category:ECMWF]][[Category:Data_formats]]

Latest revision as of 17:19, 30 January 2015

The Meteorological Archival and Retrieval System (MARS) is the main repository of meteorological data at ECMWF. It contains terabytes of operational and research data as well as data from Special Projects.

MARS data is available to registered users in the Member States and Co-operating States (see [1]).

Free downloadable datasets can be access via ECMWF Data server.


REANALYSIS:

ERA-15

- reanalyses from 12/1978 to 02/1994

- spectral T106 resolution with 31 vertical hybrid levels


ERA-40

- reanalyses from mid-1957 to 2001

- T159 spectral resolution with 60 vertical levels


ERA-interim

- reanalyses from 01/1979 up to 3 months ago

- T255 spectral resolution with 60 vertical levels

- corrected for different models so should be consistent

- useful for long term analyses


The Re-analysis data are publicly available via http://apps.ecmwf.int/datasets/

One does not need to be an authorized user but only register.

The public ERA-40 data are not the high-resolution data, and the public ERA-Interim data are not including all fields.


FORECAST:

Operational data - data up to 2 days ago

Contains forecasts/analysis (GRIB format) as well as observations (BUFR format) and observation feedbacks (ODB format).


DATA FORMAT:

- GRIB1

- GRIB2 was implemented on 18 May 2011.

Information on the GRIB2 migration can be found here.