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Geography Optional 300+ Score Pack · Model answer

With suitable examples explain the factors causing sea level changes.

  • UPSC 2024
  • Oceanography

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A sea level change is a shift in the mean position of the sea surface against the land. It can come from a change in the water (its volume or the size of the basin holding it) or from a change in the land (rising or sinking crust).

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

  • Eustatic Factors — the Water Changes
  • Glacio-eustasy (ice on land)
  • Steric change (thermal expansion)
  • Tectono-eustasy (change in basin volume)
  • Human control of water on land
  • Isostatic Factors — the Crust Adjusts to Load
  • …and 3 more sections, with a conclusion
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