Climatology
Composition and structure of the atmosphere
Practise 3 PYQsConcepts to cover
- Permanent and variable gases; ozone and carbon dioxide as absorbers
- Water vapour: decreases with altitude, maximum in the warm humid tropics, least at poles and deserts
- Dust particles: concentration in subtropical and temperate dry-wind regions
- Troposphere: thickness greater at the equator (convection), lapse rate, tropopause
- Stratosphere, ozone layer, mesosphere, thermosphere and ionosphere, exosphere
Where to study
Fundamentals of Physical Geography, Class XI, chapter 7: Composition and Structure of Atmosphere (Reprint 2026-27)
- ch. 7, Composition and Structure of Atmosphere, p. 1-4 (book pages 63-66)
- ch. 7, Gases, p. 2 (book page 64)
- ch. 7, Water Vapour, p. 2-3 (book pages 64-65)
- ch. 7, Dust Particles, p. 3 (book page 65)
- ch. 7, Structure of the Atmosphere, p. 3-4 (book pages 65-66)
Our Environment, Class VII, chapter 4: Air (Reprint 2024-25)
- ch. 4, Air, p. 1-10 (book pages 20-29)
- ch. 4, Structure of the Atmosphere, p. 3-4 (book pages 22-23)