The role of convectively-generated cold pools on model biases in the

The model biases are consistent with the larger-scale heat-low biases in the operational Unified Model. Furthermore, model analyses show significant differences in the Sahara, hampering efforts to evaluate model performance in such a data-sparse region. These issues are shown here to be linked to known deficiencies with parameterisations of convection that are used in all global weather and climate models. This study suggests that the upscale impact of the misrepresentation of moist convective processes significantly affects continental-scale biases, altering the West African monsoon circulation.