Abstract
Significant amounts of mineral dust were transported into the vicinity of the developing tropical storm Helene between 9 to 14 September 2006. A number of different dynamical features contributed to the emission and the transport of dust towards Helene. The aim of this study is to investigate the transport of mineral dust towards Hurricane Helene. A particular focus is placed on the role of the dust radiation feedback. We use the model system COSMO-ART (Aerosols and Reactive Trace gases) in which the dust emission and dust transport as well as the radiation feedback are implemented. With the help of COSMO-ART we analyse the radiative effect of the dust on the convective systems and their environment. Model runs with a horizontal resolution of 28 km were conducted with and without the radiation feedback of the dust. Based on these model runs, we were able to distinguish between dry, dry and dusty, as well as dusty and moist air. The transport of mineral dust is analysed by calculating trajectories. We aim to assess how the dust influences the environment of the developing tropical storm Helene.
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