Q. Consider the following statements regarding EI-Nino:
1.It involves both oceanic and atmospheric phenomena.
2.It is merely an extension of the warm equatorial current which gets replaced temporarily by cold Peruvian current.
Which of the statements given above is/are correct?

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: C
Notes:

Explanation: EI-Nino is a complex weather system that appears once every three to seven years, bringing drought, floods and other weather extremes to different parts of the world.

  • The system involves oceanic and atmospheric phenomena with the appearance of warm currents off the coast of Peru in the Eastern Pacific and affects weather in many places including India.
  • EI-Nino is merely an extension of the warm equatorial current which gets replaced temporarily by cold Peruvian current or Humbolt current.
  • These current increases the temperature of water on the Peruvian coast by 10°C.

Source: NCERT – Fundamental of Physical Geography