Sentences with phrase «annual snow layers»

Crevasse stratigraphy is used to determine annual snow layer thickness.

Not exact matches

These layers may be visible, related to the nature of the ice; or they may be chemical, related to differential transport in different seasons; or they may be isotopic, reflecting the annual temperature signal (for example, snow from colder periods has less of the heavier isotopes of H and O).

The first 110,000 annual layers of snow in that ice core (GISP2) have been visually counted and corroborated by two to three different and independent methods as well as by correlation with volcanic eruptions and other datable events.

The ice sheet is made up of annual layers of snow that never melted and became compacted into ice over thousands of years.

Because a thin layer of snow is just as reflective as a thick layer, the reflectivity effect depends more on the seasonal distribution of snowfall than the annual average amount.

In a general sense, the thickness of each annual layer tells how much snow accumulated at that location during the year.

The gradually increasing weight of overlying layers compresses deeply buried snow into ice, but annual bands remain.

They try to extract long cylinders of ice, ones that will show annual layers of snow and ice.

However, the more the ice compacts and the less that snow accumulates, the harder it is to see these annual layers.

Ice patches result from layers of annual snow that, until recently, remained frozen all year.