Resolution of the atmospheric model matters for the Northern Hemisphere Mid-Holocene climate

• It is found that the large-scale temperature anomalies for mid-Holocene (compared to preindustrial) are significantly different in low- and high-resolution versions For boreal winter, differences related circulation changes caused by response thermal forcing conjunction with orographic resolution. summer, shortwave cloud radiative emerges as predominant factor. The simulated (low versus high resolution) reveals a regionally can exceed anomalous anomaly. This study evaluates dependence of surface air temperatures on model resolution orography mid-Holocene. Sensitivity experiments atmospheric general ECHAM5 performed low (?3.75°, 19 vertical levels) (?1.1°, 31 Results compared respective preindustrial runs. versions. mainly an important anomaly minus version) Northern Hemisphere large signals. Furthermore, they depend applied boundary conditions. We conclude matters simulations, which should be taken into account model-model data-model comparisons.