Assessing the contribution of different factors in regional climate model projections using the factor separation method.

This study applies the factor separation ( FS) method to investigate the contributions of different factors, along with their synergy, on a set of regional climate model ( RCM) projections for the Mediterranean region. The FS method is applied to six projections for the period 1970-2100 performed with the regional model RegCM4 over the Med- CORDEX domain. Two different sets of factors are intercompared, namely the driving global climate model ( GCM) boundary conditions against two model physics settings (convection scheme and irrigation). We demonstrate the usefulness of the FS method to assess different sources of uncertainty in RCM-based regional climate projections. [ABSTRACT FROM AUTHOR]