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GeographyEasyAsked in: SSC CGL · 12 Dec 2022, Shift 2

El-Nino develops in which of these oceans?

  1. A.Arctic Ocean
  2. B.Indian Ocean
  3. C.Atlantic Ocean
  4. D.Pacific Ocean

Correct answer

D. Pacific Ocean

Explanation

The correct answer is D, Pacific Ocean. El Nino is the warming of surface water in the central and eastern equatorial Pacific.

In a normal year the trade winds push warm water westwards towards Australia and Indonesia, and cold water rises along the coast of Peru and Ecuador. In an El Nino year the trade winds weaken, warm water spreads back eastwards and the cold upwelling off South America is cut off, which hurts the anchovy catch there. The name means 'the child' in Spanish, because fishermen noticed it around Christmas. For India an El Nino year often means a weaker monsoon; the opposite phase, with colder than normal Pacific water, is called La Nina.

A is wrong: the Arctic Ocean is polar and has no such cycle. B is wrong: the Indian Ocean has its own Indian Ocean Dipole, not El Nino. C is wrong: the Atlantic has a much weaker Atlantic Nino.

Exam tip: El Nino - warm Pacific, weak Indian monsoon; La Nina - cold Pacific, usually a good monsoon.

Practice Questions

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Q2.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements is/are correct? 1. Himalayan rivers have their origin in the snow-covered areas, hence are dry in winter season. 2. Rivers of the Peninsular Plateau have reached maturity. 3. Himalayan rivers depict all the three stages of normal cycle of erosion. Select the correct answer using the code given below.

  1. A.2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: C. 2 and 3 only

Himalayan rivers are perennial, so statement 1 is wrong, while statements 2 and 3 are correct. Himalayan rivers such as the Ganga, Indus and Brahmaputra rise from glaciers and snowfields and also get monsoon rain, so they flow all year round, including in winter.

Q3.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements related to latitude are true? 1. Rainfall, temperature and vegetation vary with latitude. 2. The difference between the longest day and the shortest day increases with latitude. 3. Indira Point is located approximately at 6°45' N latitude. Select the correct answer using the code given below.

  1. A.1 and 2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3

All three statements about latitude are true. Latitude decides how directly the Sun's rays strike a place, so temperature, rainfall and the type of vegetation change from the equator towards the poles, from hot, wet rainforests to cold tundra.

Q4.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following lakes is/are situated in Ladakh? 1. Tso Kar 2. Pangong Tso 3. Tsomgo 4. Tso Moriri Select the correct answer using the code given below.

  1. A.1 only
  2. B.2 and 3
  3. C.1, 2 and 4
  4. D.2 and 4 only
Show answer
Correct answer: C. 1, 2 and 4

Tso Kar, Pangong Tso and Tso Moriri are high-altitude lakes of Ladakh, while Tsomgo lies in Sikkim. Pangong Tso, at about 4,350 metres, is a long, narrow lake that stretches from Ladakh into Tibet, and most of its length lies on the Chinese side.