Antarctica's Ice Coverage: By the Numbers

The Icy Continent in Statistics

Antarctica is the most ice-covered landmass on Earth. Here are the key figures:

Surface Coverage

• 98–99% of the continent's 14 million km² is covered by ice sheets and glaciers.
• Only ~0.3% (approx. 44,000 km²) is ice-free: coastal oases, dry valleys, nunataks (mountain peaks).

Ice Volume & Thickness

• Total ice volume: ~26.5 million km³ (70% of world's fresh water)
• Average thickness: 2,160 m (7,087 ft)
• Maximum thickness: 4,776 m (15,669 ft) in Wilkes Land
• If melted completely → global sea level rise ~58 m (190 ft)

Ice Sheet Components

• East Antarctic Ice Sheet (EAIS): Larger, thicker, colder, mostly stable
• West Antarctic Ice Sheet (WAIS): Smaller, marine-based, vulnerable to warming
• Antarctic Peninsula: Rapid warming, ice shelf collapses (Larsen A, B)

Dynamic Features

• Ice shelves: Floating extensions (Ross, Ronne-Filchner) buttress inland flow
• Ice streams/glaciers: Fast-flowing corridors (Thwaites, Pine Island) discharging to ocean
• Subglacial lakes: 400+ (Lake Vostok largest), isolated for millions of years

Antarctica's ice is not static—it flows, calves, and responds to climate change. Current net mass loss is accelerating, contributing ~0.4 mm/yr to sea level rise.