Aircraft measurement campaigns have revealed that super coarse dust (diameter >10 μm) surprisingly accounts for approximately a quarter of aerosols by mass in the atmosphere. However, most global aerosol models either underestimate or do not include super coarse dust abundance. To address this problem, we use brittle fragmentation theory to develop a parameterization for the emitted dust size distribution that includes emission of super coarse dust. We implement this parameterization in the Community Earth System Model (CESM) and find that it brings the model in good agreement with aircraft measurements of super coarse dust close to dust source regions. However, the CESM still underestimates super coarse dust in dust outflow regions. Thus, we conclude that the model underestimation of super coarse atmospheric dust is in part due to the underestimation of super coarse dust emission and likely in part due to errors in deposition processes. Plain Language Summary Aircraft measurements have found surprisingly large concentrations of super coarse atmospheric dust (diameter >10 μm), which accounts for approximately a quarter of particulate matter mass in the atmosphere. However, current atmospheric models do not include or cannot reproduce this abundance of super coarse dust. Here we develop a parameterization for the emission of super coarse dust. We evaluate this new parameterization in the Community Earth System Model (CESM) and find that it enables the model to reproduce in situ aircraft measurements of super coarse atmospheric dust near dust source regions. However, the CESM still underestimates super coarse atmospheric dust over dust outflow regions, possibly due to errors in deposition processes. We further find that the equivalent effect of possible errors in dust deposition processes during transport is to decrease the effective dust aerosol density in the CESM to an order of magnitude of its physical value of ∼2,500 kg/m3. Thus, we conclude that the underestimation of super coarse atmospheric dust by models is in part due to the underestimation of the emission of super coarse dust and likely in part due to errors in deposition processes. Key Points We develop a model parameterization for the size distribution of emitted dust aerosols that includes emission of super coarse dust The parameterization enables models to reproduce measurements of super coarse atmospheric dust near dust source regions The remaining underestimation of super coarse dust over dust outflow regions is likely due to errors in models' deposition processes