How do scientists gather data about glaciers?
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Glacial ice can range in age from several hundred to several hundreds of thousands years, making it valuable for climate research. To see a long-term climate record, scientists can drill and extract ice cores from glaciers and ice sheets. read more
The embedded pebbles and dingy ice tell researchers that this portion of the ice core is from the bottom of the glacier, right above bedrock. This chunk comes from the first ice core drilled at Mt. Hunter, Alaska; the core's total length was 682 feet. read more
Source: climate.gov
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Further Research
Glaciers and climate change
nsidc.org
How Do We Know How Much Glaciers Are Shrinking?
www.popularmechanics.com
Ice core basics
www.antarcticglaciers.org
