On an average annual basis the tropics receive more radiation ...

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On an average annual basis the tropics receive more radiation from the sun than they send back as longwave radiation, and high-latitude areas send out more longwave radiation than they receive as shortwave radiation from the sun. How is this possible?
 
  What will be an ideal response?

Question 2

Why do hurricanes develop mostly over ocean areas, and usually in late summer and early autumn?
 
  What will be an ideal response?

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Answer to Question 1

Answer: Excess heat absorbed in the tropics is advected in the atmosphere and ocean currents to high latitudes where it is radiated to space.

Answer to Question 2

Answer: They develop over ocean areas because they depend on latent heat as a major source of energy; latent heat is most plentiful in late summer and early autumn when the ocean is warmest.