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HadRM3 is the Regional Climate Model (RCM) developed by the Met Office Hadley Centre and used for UKCP09.

In detail

HadRM3 is the Met Office Hadley Centre's regional climate model used to produce regional (~25km resolution) projections of the future climate. 

HadRM3 has been used in UKCP09 to produce 11 runs of regional climate projections at the medium emissions scenario (A1B) on a daily time scale. These 11 runs were used to timescale and downscale the larger ensemble of GCM runs.

Find out more


  • More details about the climate models used in UKCP09 are given in  in the UKCP09 Climate Change Projections report. A commentary about the strengths and weaknesses of climate models is given in .
  • An overview of how probabilistic projections are created and presented in UKCP09 is described in  of the UKCP09 Briefing Report. More details are provided in Chapter 3 of the UKCP09 Climate Change Projections report, including an overview of the methodology in .
  • The 11-member RCM data is described in the Reports & guidance section and in  of the UKCP09 Climate Change Projections report.
  • More information about the HadRM3 model and output is available from the BADC website.