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Revision Notes

Atmospheric Circulation and Weather Systems

Madhya Pradesh Board · Class 11 · Geography

Quick revision notes for Atmospheric Circulation and Weather Systems — Madhya Pradesh Board Class 11 Geography. Key concepts, formulas, and definitions for last-minute revision.

61 questions20 flashcards5 concepts

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Key Topics to Revise

1

Atmospheric Pressure and Its Distribution

  • Atmospheric pressure is the weight of air column from sea level to top of atmosphere, measured in millibars (mb)
  • Standard sea level pressure = 1,013.2 mb
  • Pressure decreases with height at rate of 1 mb per 10 m elevation
2

Forces Affecting Wind Movement

  • Three main forces control surface winds: Pressure gradient force, Coriolis force, Friction force
  • Pressure gradient force acts from high to low pressure, perpendicular to isobars
  • Coriolis force deflects winds due to Earth's rotation - right in Northern Hemisphere, left in Southern Hemisphere
3

General Circulation of Atmosphere

  • Three-cell model: Hadley cells (0°-30°), Ferrel cells (30°-60°), Polar cells (60°-90°)
  • Hadley Cell: Air rises at ITCZ, moves poleward, sinks at 30°, returns as trade winds
  • Ferrel Cell: Westerlies at surface, driven by interaction between Hadley and Polar cells
4

Local Winds and ENSO

  • Land and Sea Breezes: Daily wind reversals due to differential heating of land and water
  • Sea breeze: Daytime wind from cool sea to warm land
  • Land breeze: Nighttime wind from cool land to warm sea

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Full Notes

Key Concepts

The weight of air column fromThree main forces control horizontal windEarth has distinct pressure zonesThreeLarge bodies of air with uniform

Frequently Asked Questions

What are the important topics in Atmospheric Circulation and Weather Systems for Madhya Pradesh Board Class 11 Geography?
Atmospheric Circulation and Weather Systems covers several key topics that are frequently asked in Madhya Pradesh Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Atmospheric Circulation and Weather Systems — Madhya Pradesh Board Class 11 Geography?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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