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Changing frontiers

  • Posted By
    10Pointer
  • Categories
    Environment
  • Published
    2nd Dec, 2020

Context

  • Researchers say that the warm temperature zone is expanding further.

Is the tropical zone of Earth expanding?

  • The planet Earth is divided into three climate zones: Tropical, temperate and frigid.
  • The tropical zone extends around the equator from 23.5 degrees north to 23.5 degrees south.
  • Now researchers say that this warm temperature zone is expanding further.

What are the consequences?

  • This may be the reason behind severe droughts and bushfires in Australia and parts of the U.S.

What is causing this expansion?

  • increasing greenhouse gases
  • aerosols
  • decreasing ozone may be the factors behind this expansion.
  • warming oceans are the main reason.
  • water currents

How the water currents are causing the shift?

  • Large-scale ocean currents in both the northern and southern hemispheres are the key drivers.
  • The currents in this region bring the water masses together particularly strongly, the subtropical ocean surface accumulates heat more easily here than in other marine regions.