92nd American Meteorological Society Annual Meeting (January 22-26, 2012)

Monday, 23 January 2012: 11:15 AM
Tropospheric Ozone Variability Associated with Easterly Waves and Tropical Cyclones in the Western Atlantic
Room 342 (New Orleans Convention Center )
Gregory Jenkins, Howard University, Washington, DC; and S. Ndiaye, M. Gueye, M. Drame, M. Robjhon, A. Reyes, and A. Valentine

During the summer of 2010, ozonesondes were launched at sites in Eastern and Western Atlantic (Cape Verde, Senegal and Barbados) for the period of August 15-September 16 to examine the variability in tropospheric ozone associated with easterly waves. Because of the influence ozone poor air in the marine boundary layer that is likely transported vertically into easterly waves, low ozone concentrations are expected with easterly waves in the Western Atlantic. However, lightning could also enhance ozone in the middle/upper troposphere. Here we compare ozonesondes in the Eastern Atlantic (Dakar, Senegal, Sao Vicente Cape Verde) to those in the Western Atlantic (Barbados). In addition, ozone measurements were undertaken in the vicinity of tropical cyclones (Danielle, Fiona, Gaston, Igor, Julia) at Barbados and Cape Verde showing elevated ozone levels in the middle troposphere which we attribute to lightning.

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