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Deepest Oldest Ice Gives Up Secrets

Greenland has the only permanent ice sheet in the Arctic, and its big! With depths of up to 3,400 meters / 11,000 feet thick, the ice at the bottom could be hundreds of thousands of years old.

But its only about one-eighth the size of the Antarctic ice sheet. We're talking about ice down there that's OLD!

Ice cores provide the ultimate record of past environments. Whatever happens on the Earth that changes the atmosphere - the big events - is recorded in the ice and it stays there. Drilling into the ice gives scientists a look back to the days when humans had nothing to do with climate change.

A recent ice core sample recovered in Antarctica goes back 740,000 years (nearly twice as long as any other ice core record) and scientists haven't even reached the bottom of the ice sheet! The possibility of a million-year ice core is out there, and that would be a really BIG step back in climate history.

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Library: Arctic, Ice, Glaciers
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Double-click any unlinked word DICTIONARY: Just "double-click" any unlinked word on this page for the definition from Merriam-Webster's Student Electronic Dictionary at Word Central.
Arctic Library ARCTIC LIBRARY & GLOSSARY: Check this section for an index of the rest of the things you really need to know about the Arctic.
All sorts of Arctic Maps ARCTIC MAPS & WEATHER REPORTS: Maps of the Northwest Passage, explorers' routes, iceberg sources, Nunavut, the Arctic by treeline, temperature...
Links to related sites. ARCTIC LINKS: Even more information! Links to sites related to the Arctic and "Iceberg: the Story of the Throps and the Squallhoots".
A Guide to Arctic Sunrise and Sunset GUIDE TO ARCTIC SUNRISE & SUNSET: How much sunlight or darkness is there in the Arctic on each day of the year?

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