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Geography Optional 300+ Score Pack · Model answer

Explain the characteristic features of Frontogenesis and Frontolysis.

  • UPSC 2020
  • Climatology

A front is the sloping transition zone between two air masses of contrasting temperature, density, humidity and wind; the concept came from the Bergen School — Vilhelm Bjerknes, Jacob Bjerknes, Halvor Solberg and Tor Bergeron — between 1918 and 1922.

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What the full answer covers

  • Characteristic Features of Frontogenesis
  • 1. Contrasting air masses
  • 2. A deformation field, not just any flow
  • 3. A sloping frontal surface
  • 4. Weather signatures of an active front
  • 5. Preferred zones
  • …and 7 more sections, with a conclusion

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