Linking the Different Diameter Types of Aspherical Desert Dust Indicates That Models Underestimate Coarse Dust Emission

Measurements of dust aerosol size usually obtain the optical or projected area-equivalent diameters, whereas model calculations impacts use geometric aerodynamic diameters. Accurate conversions between four diameter types are thus critical. However, most current assume is spherical, even though numerous studies show that highly aspherical. Here, we different account for asphericity. Our indicate particle counters have underestimated (Dgeo) at coarse sizes. We further to a consistent observational constraint on distribution emitted dust. This coarser than parameterizations used in global models, which underestimate mass within 10 ≤ Dgeo 20 μm by factor ∼2 and do not substantial emissions with ≥ μm. findings suggest models substantially emission.