How big is the Antarctic ice sheet?

about 5.3 million square miles
The essence of Antarctica is glacial ice cover. The ice, which has accumulated over millions of years, is up to 3 miles deep and covers about 5.3 million square miles, or about 97.6 percent of the continent.

How thick is the Antarctic ice sheet?

The mean thickness of the Antarctic ice sheet is 2.16 km. The maximum known thickness of the ice sheet is 4,776 m in Terre Adélie. Without the its ice, Antarctica may be the lowest lying continent. The greatest known depression of bedrock – the Byrd Subglacial Basin – lies at 2,538 m below sea level.

Is 98% of Antarctica covered with thick ice?

About 98% of Antarctica is covered by the Antarctic ice sheet, a sheet of ice averaging at least 1.0 mile (1.6 km) thick. The continent has about 90% of the world’s ice (and thereby about 70% of the world’s fresh water). If all of this ice were to melt, sea levels would rise about 200 ft (60m).

How big is the East Antarctic ice sheet?

The East Antarctic Ice Sheet today The total volume of ice in the Antarctic Ice Sheet today is 27 million km3, which is equivalent to 58 m of global sea level (i.e., if all the ice in Antarctica melted, sea levels would rise by 58 metres).

Where is the world’s largest ice sheet located today?

Continental Glaciers The Antarctic ice sheet is the largest block of ice on Earth. It covers more than 14 million square kilometers (5.4 million square miles) and contains about 30 million cubic kilometers (7.2 million cubic miles) of water. The Antarctic ice sheet is about 2 kilometers (1.2 miles) thick.

What is beneath Antarctica?

The ice cap that covers Antarctica isn’t a rigid whole. Researchers in Antarctica have discovered in recent years hundreds of interconnected liquid lakes and rivers cradled within the ice itself. But this is the first time the presence of large amounts of liquid water in below-ice sediments has been found.

When was Antarctica last ice free?

Antarctica hasn’t always been covered with ice – the continent lay over the south pole without freezing over for almost 100 million years. Then, about 34 million years ago, a dramatic shift in climate happened at the boundary between the Eocene and Oligocene epochs.

What is under ice sheet?

Massive aquifers may lie under all Antarctic ice streams. Beneath a fast-flowing ice stream in West Antarctica, scientists have discovered a vast aquifer brimming with seawater that’s likely been locked down there for thousands of years.