Tropical Cyclogenesis Microphysics : modeling the impact of dust on Tropical Storm Rose (2021) development over the Atlantic

According to the marsupial paradigm, some African Easterly Waves exhibit a pouch structure that shields convective systems from lateral intrusion of dry air. This protective mechanism also influences dust transport from the Saharan Air Layer, preventing its intrusion at mid to high altitudes. A Meso-NH model based simulation of the life cycle of Tropical Storm Rose (2021) is presented and validated against ECMWF ERA5 reanalyses as well as ground-based and airborne CADDIWA campaign data. The sensitivity of the model simulations to the concentration of dust is discussed. By modifying initial conditions, the impact of dust on the storm development and intensification is investigated with a specific focus on microphysics.