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Q14 (NDA-II/2011) Geography › World Physical Geography › Atmospheric pressure winds Answer Verified

Which one among the following statements relating to an anticyclone is correct ?

Result
Your answer: —  Â·  Correct: A
Explanation

An anticyclone is a large-scale atmospheric circulation characterized by a central region of high atmospheric pressure [c3][t1]. In these systems, the air pressure at the center is higher than the surrounding areas, causing air to sink and diverge outward from the center [t4][t5]. This outward movement (divergence) contradicts Option 2, which incorrectly suggests inward movement. Regarding wind direction, the Coriolis effect causes anticyclonic winds to rotate clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere [c2][t1][t8]. This makes Option 4 incorrect as it claims clockwise rotation in the Southern Hemisphere. While anticyclones influence weather by bringing clear skies and stable conditions, their contribution is often described as bringing 'settled' or 'fine' weather rather than being the primary significant driver of complex weather changes compared to cyclones [c3][t2]. Thus, Option 1 is the only fundamentally correct statement.

Sources

  1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 23: Pressure Systems and Wind System > Centripetal Acceleration > p. 309
  2. [2] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 14: Climate > Cyclonic Activity > p. 143
  3. [3] https://forecast.weather.gov/glossary.php?word=CYC
  4. [4] https://www.bom.gov.au/glossary
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SIMILAR QUESTIONS

NDA-II · 2008 · Q31 Relevance score: 3.73

Which of the following statements characterise the anticyclones? 1. Anticyclones are low pressure systems. 2. They are characterised by divergent wind circulation. 3. They are indicative of dry weather conditions. Select the correct answer using the code given below:

NDA-I · 2010 · Q49 Relevance score: 2.81

Which of the following statements are correct? 1. In a cyclone, the area of low pressure is at the centre surrounded by the areas of high pressure. 2. In a cyclone, the areas of low pressure surround the area of high pressure. 3. In an anti-cyclone, the area of high pressure is surrounded by the areas of low pressure. 4. In an anti-cyclone, the area of low pressure is surrounded by the areas of high pressure. Select the correct answer using the code given below : Code :

CAPF · 2015 · Q113 Relevance score: 2.75

Consider the following statements relating to cyclone, anti cyclone and trade wind : 1. The wind direction is clockwise in the cyclone of northern hemisphere 2. The planetary wind that blows from north-east to north-west is known as north-east trade wind 3. The wind direction is anti clockwisc in the anticyclone of southern hemisphere 4. Both westerlies and trade winds originate from sub-tropical highs Which of the statements given above is/are correct ?