The Saharan dust plume: Current knowledge on the impact on health, human
activities, and the ecosystem, with comments on research gaps
Abstract
A massive amount of dust estimated at a million tons is released from
the Sahara Desert each year into the atmosphere and travels over the
North Atlantic Ocean, commonly referred to as the Saharan dust plume
(SDP). With its ability to travel over very long distances across the
sea, the SDP is of enormous global importance, affecting climatic
processes, and playing a significant role in nutrient cycles,
sedimentary cycles, and soil development. On the other hand, from an
environmental health perspective, the SDP degrades air quality, posing
serious health threats to humans, especially to people with lung
conditions. Recent literature documents health issues, including
respiratory and cardiovascular diseases and even death in extreme cases.
Despite this knowledge, large uncertainties exist in our ability to
predict future trends in Saharan dust emissions and model-projected
atmospheric circulation patterns. Employing a comprehensive search of
the recent literature, this study reviews present knowledge of the
sources, composition and propagation dynamics of the SDP and the impact
of its contained atmospheric particulates on health, ecosystems, and
human activities to be able to formulate credible mitigation measures
and unveil areas where further research is needed for improving on these
formulations. A comprehensive list of the more recent references (mainly
post-dating 2010) is assembled to aid the search process of those
wanting to contribute to filling these important knowledge gaps.