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The Discovery of African Dust Transport to the Western Hemisphere and the Saharan Air Layer: A History, by JM.Prospero et Al.

by Ernest Werner last modified Mar 15, 2021 03:08 PM

The Discovery of African Dust Transport to the Western Hemisphere and the Saharan Air Layer: A History

By Joseph M. Prospero, Anthony C. Delany, Audrey C. Delany, and Toby N. Carlson

2021 American Meteorological Society

"There is great interest in windborne mineral dust because of the role that dust plays in climate by modulating solar radiation and cloud properties. Today, much research focuses on North Africa because it is the Earth’s largest and most persistently-active dust source.Moreover, this region is expected to be greatly impacted by climate change which would affect dust emission rates. Interest in dust was stimulated over 50 years ago when it was discovered that African dust was frequently transported across the Atlantic in great quantities.Here we report on the initial discovery of African dust in the Caribbean Basin. We show thatt here were three independent “first” discoveries of African dust in the mid-1950s to mid-1960s. In each case, the discoverers were not seeking dust but, rather, they had other research objectives. The meteorological context of African dust transport was first elucidated in 1969 with the characterization of the Saharan Air Layer (SAL) and its role in effecting the efficient transport of African dust over great distances to the western hemisphere. The link between dust transport and African climate was established in the 1970s and 1980s when dust transport to the Caribbean increased greatly following the onset of severe drought in the Sahel. Here we chronicle these events and show how they contributed to our current state of knowledge."

Early Online Release: This preliminary version has been accepted for publication in Bulletin of the American Meteorological Society, may be fully cited, and has been assigned DOI 10.1175/BAMS-D-19-0309.1. The final typeset copyedited article will replace the EOR at the above DOI when it is published.

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