Cyclone Formation Geography

Tropical cyclones require warm ocean waters (typically 26.5°C or higher) to form and sustain themselves. In the South Atlantic and South-Eastern Pacific regions, sea surface temperatures remain too low to support cyclone formation. The Coriolis force (c) is actually sufficient in tropical latitudes (though weak near the equator), and the ITCZ (b) does occur in these regions. The absence of land (d) is not a reason for lack of cyclones—many cyclones form over oceans far from land. The primary reason is the absence of warm water masses required for cyclogenesis. > Tropical cyclones need warm waters (≥26.5°C), which South Atlantic/SE Pacific lack. Answer: (a).