The climatologist would find an air sample in bubbles in ice core samples. Ice cores are drilled from ice sheets and glaciers, and as snow falls and compacts into ice, bubbles of air are trapped within the ice. These bubbles can provide valuable information about the composition of the atmosphere at the time the ice was formed, allowing researchers to study past atmospheric conditions, including greenhouse gas concentrations, over thousands of years.
A climatologist wants to gather data about the composition of the air 35,000 years ago. Where might he find an air sample?
bubbles in ice core samples
tree rings
rock sediments
alkennone molecule traces from phytoplankton
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