The Climate change in the Arctic – North Atlantic Region and Impacts on the UK Large Ensemble (CANARI-LE) priority variables are a subset of the output from a large ensemble using the HadGEM3.1 model to simulate 40 realisations of 150 years of historical and future data (a total of 6000 years of simulation).

The historical simulations (HIST2) run from 1950 to 2014, after which they continue using the SSP3-70 (SSP370) scenario forcing (historical and scenario forcings as used in CMIP6).

The model used is the medium resolution configuration of HadGEM3.1-MM used for CMIP6, with the Unified Model atmosphere at N216 (~60km) and the NEMO ocean at 0.25°.

The baseline performance of this model is described in [ADD REF].

The 40 realisations are initialised using a combination of initial conditions from eight simulations which began in 1850 with four additional initial condition perturbations applied to each of those in 1950. The priority variable subset includes fields from the atmosphere, ocean and sea-ice, at a range of temporal frequencies.

CMIP6 is the sixth phase of the Coupled Model Intercomparison Project 6 of the World Climate Research Programme (WCRP).

SSP3-70 is a future scenario in the upper middle part of the range of CMIP6 scenarios.

This work was supported through NERC award: NE/W004984/1