Consider the following statements 1 Tropical cyclones are not known to cross the equator 2 Tropical ...........

Geography World climates

Consider the following statements:

1. Tropical cyclones are not known to cross the equator.

2. Tropical cyclones in general move from west to east.

3. Tropical cyclones represent the ‘Primary Circulations’ of tropical atmosphere.

Which of the statements given above is/are correct?

1 only

1 and 2 only

2 and 3 only

1, 2 and 3

Explanation:

The low pressure/ITCZ areas, which are a few degrees (8 to 10) away from the equator promote the formation of tropical cyclones. This is so because the cyclonic system needs Coriolis force for the curvature of winds.
Near the equator, Coriolis force is negligible. Having originated over the warm waters of tropical oceans, these cyclones intensify as they move away from the equator.
Tropical cyclones are the Secondary Circulations/Atmospheric Disturbances. These happen over the primary circulations (trade winds) of the tropical belt. Since these are embedded in the trade winds, they move in general from east to west as trade winds are easterlies. Around 18-20 degrees latitudes, these systems sometimes recurve to move in northeast or north direction.