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Met Éireann very high resolution climate reanalysis for Ireland  (MÉRA) - launch Friday May 26th
22 May 2017

Climate reanalysis is a systematic approach used to produce meteorological datasets for climate monitoring and research. They are created using a fixed version of a forecast model and a data assimilation system which utilises historical observations and they produce parameters that are physically consistent and often not routinely observed. Thus, climate reanalyses have the potential to extend the knowledge gained from current observation networks.

Met Éireann has carried out a 35-year very high resolution (2.5 km horizontal grid) regional climate reanalysis for Ireland using the ALADIN-HIRLAM numerical weather prediction system ( This reanalysis spans the period 1981 to 2015 and includes surface, near-surface and atmospheric parameters and is the first of its kind for Ireland.

Overall, the model performed consistently over the 35-year time period and outperforms ECMWF's ERA-Interim global reanalysis (, particularly in terms of standard deviations in screen-level temperatures and surface winds.

An initial analysis of the data is published in the ASR open-access journal:

A 1-month sample of some of the data (in GRIB 1 format) can be found below:

mean sea level pressure

2 m temperature

10 m wind - u component

10 m wind - v component

To register for updates on the full release e-mail Click here for FAQ. The full dataset will become available during May under the creative commons Attribution 4.0 International (CC BY 4.0) license, which means the data will be free to share and adapt for any purpose. Any use of the data requires attribution.

Launch of the dataset:

Date & Time: Friday, 26th May 2017 09:45 to 13:00

Location: Callan Auditorium, DCU Alpha, Dublin 11


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