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Geography Optional 300+ Score Pack · Model answer

Explain the relationship between air masses and local winds.

  • UPSC 2025
  • Climatology

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An air mass is a body of air hundreds to thousands of kilometres across whose temperature, moisture and lapse rate stay nearly uniform horizontally, acquired over a homogeneous source region; the concept grew out of the Bergen School of Vilhelm Bjerknes, Jacob Bjerknes, Halvor Solberg and Tor Bergeron, whose 1928 scheme gave the source-region labels…

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

  • The Air Mass Sets the Character of the Local Wind
  • The Local Wind Rewrites the Air Mass
  • Weighing the Relationship
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