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. The added value of global simulations on theconvection-permitting (CP) scale is a subject of extensive research in theearth system science community. An increase in predictive skill can beexpected due to advanced representations of feedbacks and teleconnections inthe ocean–land–atmosphere system. However, the proof of this hypothesis bycorresponding simulations is computationally and scientifically extremelydemanding. We present a novel latitude-belt simulation from 57 ∘  Sto 65 ∘  N using the Weather Research and Forecasting (WRF)-Noah-MP model system with a grid incrementof 0.03 ∘ over a period of 5 months forced by sea surfacetemperature observations. In comparison to a latitude-belt simulation with45 km resolution, at CP resolution the representation of thespatial-temporal scales and the organization of tropical convectionare improved considerably. The teleconnection pattern is very close to thatof the operational European Centre for Medium Range WeatherForecasting (ECMWF) analyses. The CP simulation is associated with animprovement of the precipitation forecast over South America, Africa, andthe Indian Ocean and considerably improves the representation of cloudcoverage along the tropics. Our results demonstrate a significant addedvalue of future simulations on the CP scale up to the seasonal forecastrange.

Near-global-scale high-resolution seasonal simulations with WRF-Noah-MP v.3.8.1