21. It is located in the Intertropical Convergence Zone ( " Doldrums " ), with its fickle weather patterns. 22. The source of the rainfall is the southwest monsoon and the island's location in the Intertropical Convergence Zone. 23. The Intertropical Convergence Zone & ndash; typically a major contributor to tropical cyclogenesis & ndash; was rarely active. 24. In early October 1947, the origins of Hurricane Nine were detected north of Panama in the Intertropical Convergence Zone. 25. When this occurs over the tropics in concert with the Intertropical Convergence Zone, it is known as a monsoon trough. 26. Most storms form in warm waters several hundred miles north of the equator near the Intertropical convergence zone from tropical waves. 27. The latitudinal movement of the subtropical ridge is strongly correlated with the progression of the monsoon trough or Intertropical Convergence Zone. 28. Philip Parker King described the region in his " Voyages for the Survey of the Intertropical coasts of Australia" 29. By the middle of the dry season, the intertropical convergence zone moves south of Chad, taking the rain with it. 30. It is also possible that the group originated in the Neotropics and subsequently dispersed eastwards to Africa via the Intertropical Convergence Zone.
