Tropical Atlantic Hurricanes, Easterly Waves, and West African Mesoscale Convective Systems
Figure 4
((a) and (c)) The 700 hPa relative vorticity ( ) in August–September of 2004 (a) and in June–September of 2005 (c) along 20°W–20°E, averaged between 5°N and 15°N. The H initiation coordinates translated up to 20°W are marked as dots. The westward MCS trajectories (2.5 hours) are only plotted from 20°E to 20°W before the easterly wave left the African coast. ((b) and (d)) Zoom over two different examples: Karl in 2004 (a) and Irene in 2005 (c).
