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Global Systems and Global Governance

The Physical Character of Antarctica

  • 3 things to know
  • Component 2

Overview

Recall questions on why the continent is the coldest, driest and windiest, and on its unusually high average elevation.

What you need to know

Answer each one before you reveal it.

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Numbers

Why is Antarctica considered the windiest continent?

Numbers

What proportion of the world's fresh water is stored in Antarctica's ice sheets?

Key term

How does cold dense air form over the Antarctic ice sheet to initiate katabatic winds?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Why is Antarctica described as the coldest continent on Earth?

    Model answer

    Antarctica has the lowest recorded temperatures of any continent, with interior winter temperatures dropping below -60°C due to its high latitude, elevation, and ice-covered surface reflecting solar radiation.

  2. 2

    What makes Antarctica the driest continent?

    Model answer

    Antarctica receives very little precipitation (mostly as snow), with interior regions receiving less than 50 mm water equivalent annually, making it technically a polar desert.

  3. 3

    Why is Antarctica considered the windiest continent?

    Model answer

    Antarctica experiences extremely strong winds, particularly katabatic winds that can exceed 300 km/h, making it the windiest continent on Earth.

  4. 4

    What is Antarctica's average elevation, and why is it so high?

    Model answer

    Approximately 2,500 metres, due to the thickness of its ice sheet covering the underlying bedrock.

  5. 5

    What proportion of the world's fresh water is stored in Antarctica's ice sheets?

    Model answer

    Approximately 70% of the world's fresh water is locked in Antarctica's ice sheets.

  6. 6

    What temperatures characterise Antarctica's interior during winter and coastal areas during summer?

    Model answer

    Interior winter temperatures reach below -60°C, while coastal areas average around 0°C in summer.

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