Meteorological Aspects of Dust Storms - Mineral Dust: A Key Player in the Earth System - page 131

Fig. 6.6 Schematic depiction of the vertical three-dimensional structure of a dust storm over the
western USA (Fig. 18 from Lewis et al. 2011 )
currents, they are also termed 'haboobs' in the literature (see Sect. 6.3.3 ). An
important element in convective haboobs is the separation of up- and downdrafts
through vertical shear, which enhances evaporation (Fig. 6.7 ). In contrast to many
cold-frontal haboobs, those associated with convection may be accompanied by a
shelf or arc cloud over the head of the density current, where moist and warm air is
lifted over the advancing cooler air (Fig. 6.7 ).