Planet 51 castellano online dating

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.

Drilling a vertical hole through this ice involves a serious effort involving many scientists and technicians, and usually involves a static field camp for a prolonged period of time.

It is possible to discern past air temperatures from ice cores.

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

This section contains 11 annual layers with summer layers (arrowed) sandwiched between darker winter layers.

Snow precipitation over Antarctica is made mostly of HO is related to surface temperature at middle and high latitudes.

The relationship is consistent and linear over Antarctica[9].

Shallow ice cores (100-200 m long) are easier to collect and can cover up to a few hundred years of accumulation, depending on accumulation rates.

Deeper cores require more equipment, and the borehole must be filled with drill fluid to keep it open.

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