Dusts are a significant climate forcing due to their direct effects on scattering and absorption
of solar and thermal radiation as well as indirect effects on clouds and precipitation. There are
inconsistent results of aerosol indirect effects on clouds and lack of direct evidence that reveal
the impacts of dusts on rainfall internal structures. We utilize multi-sensors on multi-platforms to
investigate Sahara dust layer impact on cloud and precipitation over Atlantic Ocean, with focusing on
microphysical processes of dust-cloud interaction. We found that dusts suppress the precipitation and
reduce the latent heat release in high altitudes, resulting more suspended clouds. Strong convection
in rainy clouds play a very important role in transporting Sahara dust particles from lower layer to
upper layer of tropical atmosphere. Aerosol indirect effects are significantly altitude-dependent for
different convection strengths.