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Q121 (NDA-II/2025) Geography › World Physical Geography › Atmospheric pressure winds Answer Verified

Consider the following conditions favourable for the formation and intensification of Tropical Storms : 1. Presence of the Coriolis force 2. Upper divergence above the sea level system 3. High variations in the vertical wind speed Which of the conditions given above is/are correct ?

Result
Your answer: —  Â·  Correct: C
Explanation

Tropical storm formation and intensification require specific atmospheric conditions. First, the presence of the Coriolis force is essential to create the cyclonic vortex; its absence near the equator (0°-5° latitude) prevents the spiraling of air, causing low-pressure systems to fill rather than intensify [4]. Second, upper-level divergence (anticyclonic circulation) at heights of 9,000 to 15,000 meters is necessary to pump out ascending air, thereby maintaining the low pressure at the center [1]. Third, high variations in vertical wind speed (high vertical wind shear) are actually unfavorable, as they inhibit the development of towering cumulonimbus clouds and disrupt the vertical transport of latent heat [3]. Therefore, only conditions 1 and 2 are favorable for the formation and intensification of tropical storms.

Sources

  1. [2] INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 6: Natural Hazards and Disasters > Tropical Cyclone > p. 60
  2. [4] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 23: Pressure Systems and Wind System > Why Tropical Cyclones Do Not Form At The Equator? > p. 309
  3. [1] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 8: Natural Hazards and Disaster Management > Te following conditions are required for the origin and development of a tropical cyclone: > p. 47
  4. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 26: Tropical Cyclones > Wind Shear > p. 359
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SIMILAR QUESTIONS

CAPF · 2018 · Q51 Relevance score: 1.31

Which of the following statements about tropical cyclone are correct? 1. It originates and develops over warm oceanic surface. 2. Presence of Coriolis force is necesBajy for it. 3. It occurs in middle latitudinal region* 4. It develops ‘eye’ with calm and descending air condition. Select the correct answer using the code given below.

CAPF · 2017 · Q103 Relevance score: -0.81

Which one of the following is NOT a favourable condition for occurrence of a thunderstorm ?

CDS-II · 2010 · Q67 Relevance score: -1.02

Consider the following statements : 1. A hurricane acquires its spin, from the coriolis effect. 2. The diameter of the hurricane decreases as it, moves away from low latitudes, 3. The diameter of a hurricane is never below 150 km. Which of the statements given above is /are correct ?

NDA-II · 2017 · Q99 Relevance score: -1.78

Consider the following characteristics of a tropical cyclone : 1. A warm sea temperature of > 26°C 2. High relative humidity of atmosphere at a height of > 700 m 3. Atmospheric instability The above mentioned characteristics are associated with which one of the following cycles of its development ?

CDS-I · 2012 · Q72 Relevance score: -1.83

Consider the following state- ments : 1. Coriolis effect is zero at the Equator. 2. Coriolis effect is more towards the Poles. 3. Coriolis effects are related to the decreasing rotational velocity with increasing latitudes. 4. Coriolis effects are related to the increasing rotational velocity with increasing latitudes. Which of the statements given above are correct ?