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UPSC 2015: In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason?
(a)Sea surface temperatures are low
(b)Inter-Tropical Convergence Zone seldom occurs
(c)Coriolis force is too weak
(d)Absence of land in those regions
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Not attemptedCorrect Answer: (b) Inter-Tropical Convergence Zone seldom occurs
The Inter-Tropical Convergence Zone (ITCZ) provides the pre-existing easterly-wave disturbances that seed most tropical cyclones. Because the ITCZ seldom forms or shifts south of the equator into the South Atlantic or south-eastern Pacific, the necessary low-level cyclonic vorticity and organised convection are absent, so cyclones rarely originate there. Hence option (b) is correct; the other factors either exist in other cyclone-prone basins (e.g., adequate Coriolis force, warm SSTs) or actually favour, not hinder, cyclone formation. ([civilsdaily.com](https://www.civilsdaily.com/civil-services-prelims-2015-official-answer-keys/))
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Frequently Asked Questions
What is the correct answer to this UPSC 2015 Geography question?▼
The correct answer is option (b): Inter-Tropical Convergence Zone seldom occurs. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Atmosphere & Climatology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2015, GS Paper 1, as Question 5. It falls under Geography > Atmosphere & Climatology.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Atmosphere & Climatology?▼
UPSC has asked 70 questions from Atmosphere & Climatology (under Geography) across multiple years. Visit the topic page to see the full list and year-wise trends.