27th Conference on Hurricanes and Tropical Meteorology


New evidence for a long-term relationship between North Atlantic tropical cyclones and African dust outbreaks

Amato Evan, CIMSS/Univ. of Wisconsin, Madison, WI; and C. S. Velden

It is well known that North Atlantic tropical cyclone activity varies strongly over time, and that summertime dust transport over the North Atlantic also varies from year to year. However, any connection between tropical cyclone activity and atmospheric dust (as mediated by the Saharan Air Layer) has been limited to observations made from a few case studies. Using 24years of AVHRR atmospheric dust observations, a strong (inverse) correlation is seen between the interannual variability of tropical cyclones, and African dust outbreaks over the North Atlantic. While this cannot conclusively demonstrate a direct casual relationship between the two variables, there appears to be a strong link between tropical cyclone activity and dust transport over the Tropical North Atlantic.

extended abstract  Extended Abstract (2.2M)

Supplementary URL: http://cimss.ssec.wisc.edu/clavr/patmosx.html

Session 16C, Tropical Cyclones and Climate V - Atlantic Basin
Friday, 28 April 2006, 10:30 AM-12:30 PM, Big Sur

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