Paper awarded: Al‐Shukaili, A., Al‐Busaidi, H., Al‐Maktoumi, A., Abdalla, O., Shelukhina, O., and Kacimov, A. R. (2019). Oblique Porous Composite As Evaporating “Cap”: Do Desert Dunes Preserve Moisture By Capillary Barriers And Tilt Of Their Slopes? Water Resources Research, 55, 2504–2520, doi: 10.1029/2018WR024526 (2020).