Surface and Tropospheric Response of North Atlantic Summer Climate from Paleoclimate Simulations of the Past Millennium

We investigate the effects of solar forcing on North Atlantic (NA) summer climate, in climate simulations with Earth System Models (ESMs), over preindustrial past millennium (AD 850–1849). use one simulation and a four-member ensemble performed MPI-ESM-P CESM-LME models, respectively, forced only by low-scaling variations Total Solar Irradiance (TSI). apply linear methods (correlation regression) composite analysis to estimate NA surface tropospheric climatic responses decadal variability. Linear CESM indicate weak response sea-level pressure (SLP) 500-hPa geopotential height TSI, decreased values Greenland increased subtropics. Composite indicates that, during high-TSI periods, SLP decreases eastern Canada at increases subtropical NA. The possible SSTs is overlapped model internal Therefore, for TSI changes, state-of-the-art ESMs disagree effect indicated proxy-based studies millennium. control all variables studied, spurious patterns apparent may arise from single simulations.