text: What improvements 
  does UKCP18 deliver? 
  
  UKCP18 will benefit from a range of developments 
  since the release of UKCP09, including: 
  • Greater understanding of user needs as a result 
  of the adaptation community’s use of UKCP09 
  projections and the subsequent feedback – user 
  workshops indicated that users supported the 
  continued use of probabilistic projections and the 
  importance of spatially coherent information4. 
  • Advances in climate models in recent years, such 
  as the Met Office Hadley Centre HadGEM35 model 
  and the CMIP56 set of models. Improvements 
  include better representation of the past 
  climate, the inclusion of more cloud and aerosol 
  processes and the ability to model important 
  climate phenomena such as the El-Niño Southern 
  Oscillation (ENSO). 
  • Groundbreaking Met Office research on 
  modelling of extreme events in high resolution 
  regional climate models7. 
  • The increased quantity and range of observations 
  available since 2009. 
  • Use of the new Met Office supercomputer, 
  enabling a credible range of climate projections to 
  be generated in greater spatial detail. 