Here we give an overview of the most significant findings:
(1) The morning breakdown of nocturnal low-level jets is an important emission mechanism, but details depend crucially on nighttime stability, which is often badly handled by models and even misrepresented in re-analysis data.
(2) Convective cold pools are a key control on summertime dust emission over northern Africa, directly through the strong winds along their leading edges and indirectly through their influence on the Saharan heat low, which controls the horizontal pressure gradient across the Sahel. The cold pools are severely misrepresented by models using parameterized convection. A new scheme based on downdraft mass flux has been developed that can mitigate this problem.
(3) Despite single extreme events, mobile cyclones make a relatively unimportant climatological contribution to dust emission, except for northeastern Africa in spring.
(4) A new global climatology of dust devils identifies local hotspots but suggests a minor contribution to the global dust budget in contrast to previous studies. A new dust-devil parameterization based on data from large-eddy simulations will be presented.
(5) The lack of sufficient observations and misrepresentation of physical processes lead to a considerable uncertainty and biases in (re)analysis products. In nature few rare intense events can make a substantial contribution to annual dust emission but models tend to miss the tail of the wind speed distribution.
(6) Intraseasonal, interannaual, and spatial variations in vegetation-related surface roughness create substantial wind variability and can support long-term dust trends in semi-arid areas like the Sahel.