ABSTRACT
The various tropical climates are most effectively differentiated on the basis of moisture patterns, specifically on the amount and distribution of rainfall rather than by temperature condition. The seasonal movement of the Inter-Tropical Convergence Zone (ITCZ) and its associated areas of rising and descending air within the tropics can be used to demonstrate few tropical climates based on the amount and distribution of their moisture supplies. Moisture recycling mechanisms are fundamental in the moist tropics for the maintenance of high and well-distributed rainfall over the year, especially in interior continental regions like the Amazon and central Africa. Moving pole wards from the tropical wet and dry climate on either side of the equator, rainfall continues to decline and the dry season becomes more pervasive. Atmospheric disturbances and major winds blowing across the arid and semi-arid areas of the world can send millions of tonnes of dust thousands of kilometres from their source of origin.
