ESS101C
Prof.
Jin-Yi Yu
Ice Core Drilling
qThe best
place on an ice sheet to take ice cores is at the top.
qIce cores
can be dated by counting annually deposited layer (or ice flow model).
qAnnual
layering is recorded in several properties of ice cores, the most obvious of which are layers of dust easily
visible to the eye.
qDust is
usually deposited at the end of cold, dry windy winters.
qOne of the
most famous ice core drilling is at a site high on the Antarctic ice sheet, which is called the Vostok ice
record.
(from Earth’s Climate: Past and Future)