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Q100 (CAPF/2008) Geography › World Physical Geography › Ocean-atmosphere oscillations Answer Verified

Which one of the following descriptions denotes the phenomenon of E1 Nino ?

Result
Your answer: —  Â·  Correct: C
Explanation

El Niño is a climate phenomenon characterized by the anomalous warming of sea surface temperatures (SST) in the central and eastern tropical Pacific Ocean [6]. It represents the warm phase of the El Niño-Southern Oscillation (ENSO) cycle [6]. Under normal conditions, trade winds blow warm water toward the west; however, during El Niño, these winds weaken, allowing warm water to drift eastward toward the South American coast, replacing the cool Peruvian current [2]. This shift in ocean temperatures alters atmospheric circulation and pressure patterns, leading to significant global weather variations [4]. Option 1 describes a tornado, Option 2 refers to the Coriolis effect, and Option 4 describes tropical cyclones in the Atlantic/Caribbean basin [t3]. Therefore, the description of widespread warming in the tropical Pacific accurately denotes El Niño [7].

Sources

  1. [3] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 4: Climate of India > Possible Causes of El-Nino > p. 13
  2. [5] https://www.climate.gov/news-features/blogs/enso/what-el-nino-southern-oscillation-enso-nutshell
  3. [6] https://www.weather.gov/media/ajk/brochures/ENSOFactSheetWinter1617.pdf
  4. [2] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 8: Natural Hazards and Disaster Management > el nino (southern oscillation) and indian Monsoon > p. 54
  5. [4] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 8: Natural Hazards and Disaster Management > el nino (southern oscillation) and indian Monsoon > p. 53
  6. [7] https://education.nationalgeographic.org/resource/el-nino/
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SIMILAR QUESTIONS

NDA-II · 2010 · Q2 Relevance score: -2.96

Which among the following statements characterized El Nino? I. It occurs at irregular intervals II. It carriers warmer water III. It carries less saline water IV. Its atmospheric equivalent is southern oscillation Select the correct answer using the code given below

CDS-I · 2022 · Q74 Relevance score: -3.13

Which one of the following is not a resultant of the El Nino effect ?

IAS · 2010 · Q4 Relevance score: -3.56

A new type of El Nino called El Nino Modoki appeared in the news. In this context, consider the following statements: 1. Normal El Nino forms in the Central Pacific ocean whereas El-Nino Modoki forms in Eastern Pacific ocean. 2. Normal EI Nino results in diminished hurricanes in the Atlantic ocean but El Nino Modoki results in a greater number of hurricanes with greater frequency. Which of the statements given above is/are correct ?

NDA-II · 2013 · Q53 Relevance score: -3.70

Which of the following are the results of El Nino? 1. Reduction in the amount of planktons which further reduces the number of fish in the sea. 2. Irregularities in the evaporation of sea water. 3. Distortion of equatorial atmospheric circulation. Select the correct answer using the code given below :

IAS · 2011 · Q52 Relevance score: -3.93

La Nina is suspected to have caused recent floods in Australia. How is La Nina different from EI Nino? 1. La Nia is characterised by unusually cold ocean temperature in equatorial Indian Ocean whereas EI Nino is characterised by unusually warm ocean temperature in the equatorial Pacific Ocean. 2. El Nino has adverse effect on southwest monsoon of India, but La Nina has no effect on monsoon climate. Which of the statements given above is/ correct?