Sentences with phrase «snow layers»

The seasonal snow layers are easiest to see in snow pits, writes Alley, the Evan Pugh Professor in the Environment Institute and Department of Geosciences at Pennsylvania State University.

By standing in the covered pit, scientists can study the annual snow layers in the snow wall as the sunlight filters through the other side.

Dynamics of a continental glacier are a slow build up as snow layers accumulate, followed by a relatively rapid melt as snow turns to rain.

A similar slippery and fragile snow layer is something called «surface hoar» — essentially a morning frost on top of the snow that gets buried by more snow.

A warm summer can remove enough snow to allow several years of impurities to concentrate at the surface as surrounding snow layers disappear.

Year after decade after century after millennium, these compressed snow layers trap air bubbles in them and become buried ice vaults, locking data into retrievable troves of climate and atmospheric information.

Every year that it snows in Antarctica, the new snow layer weighs on the previous layer, compacting over hundreds or thousands of years to eventually form layers of ice.

Crevasse stratigraphy is used to determine annual snow layer thickness.

A third effect occurs when black carbon (BC) particles land on snow, and the tiny specks of dark material in the upper snow layers absorb heat from the sun and promote melting.

I have made a stunning snow temperature measurement 2 days ago, some -4.3 C below surface air temperature 2 meters above, with sun 20 degrees high shinning on the surface of mixed snow layers, fresh on top, harder below.

The seasonal snow layers are easiest to see in snow pits, writes Alley, the Evan Pugh Professor in the Environment Institute and Department of Geosciences at Pennsylvania State University.

That doesn't provide a full picture of snow accumulation, since it doesn't take into account the density of the snow layers that pile on the ice.

Instead, they forage along runs and tunnels dug beneath the snow layer.

Professor Mark Williams said: «The range of environments we are working with is remarkable — from polar ice and snow layers to deep lake and sea floors to the skeletons of reef corals and stalactites in caves.

During the Younger Dryas transition, drastic shifts in the entire North Atlantic climate were visible within five snow layers, that is, as little as five years!

Catwalk to couch: Fake it like Sienna Miller this winter and pile up layers of cosy faux fur to stay warm in the snow