ECMWF re-analysis

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The ECMWF re-analysis project is in two phases. The first, ERA-15 generated re-analyses from December 1978 to February 1994. The second, ERA-40, begins in 1957 (the IGY).

Numerical weather prediction models generate an "analysis" to begin their forecasts from. These analyses themselves are a valuable tool for meteorological and climatological analysis. However, they suffer from inconsistency, because the analysis system is being constantly improved. Hence, the idea developed to re-analyse all the old data, including much archived data that was not available to the original analyses, using a consistent modern analysis system.

[edit] See also

• NNR - NCEP/NCAR re-analyses

[edit] External links

• ERA-40 project
• ERA-15 project