Articles | Volume 18, issue 12
Research article
28 Jun 2018
Research article |  | 28 Jun 2018

Can explicit convection improve modelled dust in summertime West Africa?

Alexander J. Roberts, Margaret J. Woodage, John H. Marsham, Ellie J. Highwood, Claire L. Ryder, Willie McGinty, Simon Wilson, and Julia Crook

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Cited articles

Acker, J. G. and Leptoukh, G.: Online Analysis Enhances Use of NASA Earth Science Data, Eos, Trans. AGU, 88, 14–15, 2007.
Ackerley, D. Joshi, M. M., Highwood, E. J., Ryder, C. L., Harrison, M. A. J., Walters, D. N., Milton, S. F., and Strachan, J.: A Comparison of Two Dust Uplift Schemes within the Same General Circulation Model, Adv. Meteorol., 13,, 260515, 2012.
Allen, C. J. T., Washington, R., and Engelstaedter, S.: Dust emission and transport mechanisms in the central Sahara: Fennec ground-based observations from Bordj Badji Mokhtar, June 2011, J. Geophys. Res.-Atmos., 118, 6212–6232, 2013.
Allen, C. J. T. and Washington, R.: The low-level jet dust emission mechanism in the central Sahara: Observations from Bordj-Badji Mokhtar during the June 2011 Fennec Intensive Observation Period, J. Geophys. Res.-Atmos., 119, 2990–3015, 2014.
Bergametti, G., Rajot, J. L., Pierre, C., Bouet, C., and Marticorena, B.: How long does precipitation inhibit wind erosion in the Sahel?, Geophys. Res. Lett., 43, 6643–6649, 2016.
Short summary
The summer Saharan dust hotspot is seasonally tied to the occurrence of convective storms. Global weather and climate models parameterise convection and so are unable to represent their associated dust uplift (haboobs). However, this work shows that even when simulations represent convection explicitly: (1) dust fields are not strongly affected, (2) convective storms are too small, (3) haboobs are too weak and (4) the land surface (bare soil and soil moisture) is dominant in controlling dust.
Final-revised paper