Here's another series of videos. These were produced by netNebraska.org and are an introduction to the ANDRILL project in Antarctica.
These folks set up fifty tons worth of drill rig, pipe, field station and people on a floating Ice Sheet 20 to 26 feet thick, then go through 900 feet of ocean, before hitting bedrock and starting to drill rock cores. It is an amazing technical and scientific achievement.
Uploaded on Dec 22, 2010 | NETnebraska·Antarctica is the iciest place on Earth, but not all of the ice on the continent is the same -- nor is it sitting still. Antarctica has both floating ice and land-based ice. What is the difference between ice sheets, ice shelves and sea ice? How does this ice affect the stratification and circulation of global oceans? How does it affect climate? And why does melting sea ice not raise sea level but melting land-based ice sheets do? For more of Antarctica's Secrets, including teachers' guides, visit http://www.netnebraska.org/ice.
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Antarctic Geologic Drilling - About
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Uploaded on Dec 22, 2010 | NETnebraskaWhat is "deep time?" Witness ANDRILL coring deep beneath an ice shelf (and sea ice) to recover layers of sediments in rock cores to understand the history and future of Earth's climate. The sediments laid down were a result of glaciers that bulldozed the landscape to deposit layers representing different time periods...getting older as ANDRILL cores deeper.
But why does ANDRILL seek rock cores instead of ice cores? Antarctica's thick ice cover can only record up to 1 million years of Earth's climate history, while ANDRILL's rock cores can reveal millions of years...to a time when the continent was nearly ice-free. For more of Antarctica's Secrets, including teachers' guides, visit http://www.netnebraska.org/ice.
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Uploaded on Dec 22, 2010 | NETnebraskaWhat's a normal climate cycle? How do earth systems -- the shape of Earth's orbit, its tilt and wobble, as well as solar heating -- contribute to changes in Antarctica's ice? Why do ANDRILL scientists and climate modelers worry about warming? Using animation and climate models, see how ANDRILL tracks changes in Antarctica's environment through time. Examine a warmer Antarctica with higher greenhouse gases to learn where global climate is heading. For more of Antarctica's Secrets, including teachers' guides, visit http://www.netnebraska.org/ice.
~ ~ ~ ~ ~ ~ ~FYINational Snow and Ice Data Center~ ~ ~In the Southern Hemisphere summer of 2002, scientists monitoring daily satellite images of the Antarctic Peninsula watched in amazement as almost the entire Larsen B Ice Shelf splintered and collapsed in just over one month. They had never witnessed such a large area—3,250 square kilometers, or 1,250 square miles—disintegrate so rapidly.~ ~ ~In late February 2008, the Wilkins Ice Shelf on the Antarctic Peninsula disintegrated~ ~ ~Ice shelf collapse By Bethan DaviesTable 1. Dates of ice shelf collapse~ ~ ~ ~ ~ ~ ~
Uploaded on Dec 22, 2010 | NETnebraskaANDRILL's rock cores include many kinds fossils -- some large and easily seen, like shells, and others that are microscopic. The fossils tell how Antarctica's climate has changed through time. And some of the biggest discoveries are due to the smallest organisms, like diatoms and foraminifera, some of which lived only in open oceans -- suggesting that ice shelves have not always been present in this frozen frontier. For more of Antarctica's Secrets, including teachers' guides, visit http://www.netnebraska.org/ice.~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
Uploaded on Dec 22, 2010 | NETnebraska
This video examines what Antarctica looks like today -- how thick the ice cover is, what the continent would look like without ice, and how ANDRILL scientists prepare to work in the coldest, driest, windiest place on Earth. Challenged by a continent covered in ice, how can ANDRILL researchers find any clues at all? This unit shows how ANDRILL scientists detect Antarctica's climate history -- by prospecting, surveying and drilling to read Earth's history in sediments and rocks. For more Antarctica's Secrets, including teachers' guides, visit http://www.netnebraska.org/ice.