Graph of radiocarbon dating accuracy

06-Sep-2017 20:18

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It must have a suitable freezing point and viscosity.

From the US National Oceanic and Atmospheric Administration, Wikimedia Commons.

Seasonal differences in the snow properties create layers – just like rings in trees.

Unfortunately, annual layers become harder to see deeper in the ice core.

They allow us to go back in time and to sample accumulation, air temperature and air chemistry from another time[1].

graph of radiocarbon dating accuracy-3

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Slow ice flow at the centre of these ice sheets (near the ice divide) means that the stratigraphy of the snow and ice is preserved.

This can be related directly to concentrations of carbon dioxide, methane and other greenhouse gasses preserved in the ice.

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