Habib Senghor
Agence Nationale de l’Aviation Civile et de la Météorologie, Dakar, 8184, Sénégal
Abdou L. Dieng
Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon-Fongang (LPAO-SF), Université Cheikh Anta Diop, Dakar, 10700, Sénégal
Moussa Gueye
Département de Mathématiques et Informatiques, Université du Sine Saloum Elhadj Ibrahima Niass, Kaolack BP 55, Sénégal
Cheikh A. Diop
Agence Nationale de l’Aviation Civile et de la Météorologie, Dakar, 8184, Sénégal
Mariane D. Kane
Agence Nationale de l’Aviation Civile et de la Météorologie, Dakar, 8184, Sénégal
Amadou T. Gaye
Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon-Fongang (LPAO-SF), Université Cheikh Anta Diop, Dakar, 10700, Sénégal
This research studies the capability of the Weather Research and Forecasting model coupled with the Chemistry/Aerosol module (WRF-Chem) with and without parametrization to reproduce a dust storm, which was held on 27th June 2018 over Sahara region. The authors use satellite observations and ground-based measurements to evaluate the WRF-Chem simulations. The sensitivities of WRF-Chem Model are tested on the replication of haboob features with a tuned GOCART aerosol module. Comparisons of simulations with satellite and ground-based observations show that WRF-Chem is able to reproduce the Aerosol Optical Depth (AOD) distribution and associated changes of haboob in the meteorological fields with temperature drops of about 9 °C and wind gust 20 m·s–1. The WRF-Chem Convection-permitting model (CPM) shows strong 10-meter winds induced a large dust emission along the leading edge of a convective cold pool (LECCP). The CPM indicates heavy dust transported over the West African coast (16°W-10°W; 6°N-21°N) which has a potential for long-distance travel on 27th June between 1100 UTC and 1500 UTC. The daily precipitation is improved in the CPM with a spatial distribution similar to the GPM-IMERG precipitation and maximum rainfall located at the right place. As well as raising a large amount of dust, the haboob caused considerable damage along its route.
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