Unlock Elite Access: Level Up Your Preparation with Exclusive Content

Geography Optional 300+ Score Pack · Model answer

Discuss in detail the tri-cellular model of atmospheric circulation.

  • UPSC 2019
  • Climatology

The tri-cellular model explains the general circulation of each hemisphere as three linked meridional cells — Hadley (tropical), Ferrel (mid-latitude) and Polar — which together produce the alternating pressure belts and planetary winds at the surface.

You are reading the opening of the model answer. The full answer is part of the Geography Optional 300+ Score Pack.

What the full answer covers

  • Evolution of the Model
  • The Three Cells in Detail
  • 1. Hadley cell (0° to about 30°)
  • 2. Ferrel cell (about 30° to 60°)
  • 3. Polar cell (about 60° to 90°)
  • The Ferrel Problem and the Modern View
  • …and 3 more sections, with a conclusion

Unlock this answer and 800+ more

  • 820 solved PYQ model answers (2013–2026), Paper I and Paper II
  • Topic-wise across all 20 syllabus units
  • 20 PYQ Pattern Analysis & Strategy reports, one per unit
  • Diagrams and maps drawn inside the answers, where you would draw them
  • 500 days of access from the day you enrol, on phone, laptop or tablet

₹1,770₹2,50029% off

Get Geography Optional 300+ Score Pack @ ₹1,770 →

One-time payment · No subscription · Instant access · UPI, cards, RuPay

See every Climatology question (67 solved) →Already enrolled? Log in