The electrification of dust-lofting gust fronts (‘haboobs’) in the Sahel |
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| Authors: | E. Williams N. Nathou E. Hicks C. Pontikis B. Russell M. Miller M.J. Bartholomew |
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| Affiliation: | aParsons Laboratory, MIT, Cambridge, MA, USA;bUniv. des Antilles et de la Guyane, Guadeloupe, France;cUniversity of Michigan, Ann Arbor, Michigan, USA;dBrookhaven National Laboratory, Upton, NY, USA |
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| Abstract: | Two Doppler radars and a suite of auxiliary surface observations are used to document the electrical, aerosol and aerodynamic properties of dust-lofting gust fronts near Niamey, Niger during the AMMA (African Monsoon Multidisciplinary Analysis). Electrification with dominant negative polarity is a common behavior, consistent with earlier studies on dust devils and the Harmattan wind in dry environments. |
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| Keywords: | Haboob Gust front Dust Charge separation Tribo-electricity Sand grains Saltation Electric field |
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