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The Earth's climate has not been constant over geological time. This record is contained in ice, which has built up as snowfall accumulated in distinct yearly layers. Pockets of air trapped between the snow crystals contain traces of past atmospheres, which in turn tell us about the climate at the time the snow formed. Glaciologists collect this record by drilling ice cores and then use sensitive chemical techniques to analyse the layers.

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Date Of Record Release 2010-08-04 16:08:45
Description The Earth's climate has not been constant over geological time. This record is contained in ice, which has built up as snowfall accumulated in distinct yearly layers. Pockets of air trapped between the snow crystals contain traces of past atmospheres, which in turn tell us about the climate at the time the snow formed. Glaciologists collect this record by drilling ice cores and then use sensitive chemical techniques to analyse the layers.
Classification
Resource Type
Format
Subject
Source University of North Texas
Keyword Climate Variability and Change, Paleoclimatology, Antarctica
Selector Selection Committee
Date Of Record Creation 2010-08-04 15:52:49
Education Level
Date Last Modified 2010-08-24 21:32:29
Creator British Antactic Survey
Language English
Date Record Checked: 2010-08-04 00:00:00 (W3C-DTF)

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