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Ice core sample taken from drill. An ice core is a core sample that is typically removed from an ice sheet or a high mountain glacier.Since the ice forms from the incremental buildup of annual layers of snow, lower layers are older than upper ones, and an ice core contains ice formed over a range of years.
A portion of the core. Studies of nuclear isotopes and various atmospheric constituents provide detailed records of climate change over 100,000 years. From the analysis of the oxygen isotope ratio of the GRIP core excavated in 1992, it became clear that abrupt climate change occurred in Greenland during the last glacial period.
Ice cores are one of the most important motivations for drilling in ice. Since ice cores retain environmental information about the time the ice in them fell as snow, they are useful in reconstructing past climates, and ice core analysis includes studies of isotopic composition, mechanical properties, dissolved impurities and dust, trapped ...
The European Project for Ice Coring in Antarctica (EPICA) is a multinational European project for deep ice core drilling in Antarctica. Its main objective is to obtain full documentation of the climatic and atmospheric record archived in Antarctic ice by drilling and analyzing two ice cores and comparing these with their Greenland counterparts ...
The Greenland Ice Sheet Project (GISP) was a decade-long project to drill ice cores in Greenland that involved scientists and funding agencies from Denmark, Switzerland and the United States. Besides the U.S. National Science Foundation (NSF), funding was provided by the Swiss National Science Foundation and the Danish Commission for Scientific ...
The core, which Putkonen estimates is between 4 and 5 million years old, was discovered during a 2018 expedition in Antarctica. He said the 10 meter-long core contains invaluable information for ...
The National Science Foundation Ice Core Facility (NSF-ICF), known as the National Ice Core Laboratory (NICL) before 2018, is the primary repository for ice cores collected by the United States. The facility is located at the Denver Federal Center in Lakewood, Colorado , and is managed by the United States Geological Survey (USGS). [ 1 ]
This is a list of ice cores drilled for scientific purposes. Note that many of these locations are on moving ice sheets, and the latitude and longitude given is as of ...