Sentences with phrase «ancient ice sheets»

Not exact matches

Here, at the West Antarctic Ice Sheet Divide, Kendrick Taylor and his team of glaciologists drill into ancient ice to pull up ice cores, which trap bubbles of the atmosphere from the time that ice fell as snIce Sheet Divide, Kendrick Taylor and his team of glaciologists drill into ancient ice to pull up ice cores, which trap bubbles of the atmosphere from the time that ice fell as snice to pull up ice cores, which trap bubbles of the atmosphere from the time that ice fell as snice cores, which trap bubbles of the atmosphere from the time that ice fell as snice fell as snow.

The detailed mapping and sampling of the partially eroded Kima» Kho tuya in northern British Columbia, Canada shows that the ancient regional ice sheet through which the volcano erupted was twice as thick as previously estimated.

In the lab, ancient bacteria from ice samples 420,000 years old, retrieved from more than 2 miles (3 km) inside the ice sheet, have quickly shown signs of life.

Similarly ancient sediments may be preserved in many regions formerly covered by Pleistocene ice sheets.

Rapid sea - level changes (10 meters within 1000 years) were found in ancient coral reefs: Thompson and Goldstein (2005); Blanchon et al. (2009) found a «2 — 3 - m jump in sea level» in a century, presumably due to ice sheet instability, during a period warmer than the 20th century.

Ice sheets contain a record of hundreds of thousands of years of past climate, trapped in the ancient snow.

A new study of the ancient Laurentide Ice Sheet suggests that Greenland and Antarctic ice sheets may not accelerate as quickly as previously thougIce Sheet suggests that Greenland and Antarctic ice sheets may not accelerate as quickly as previously thougice sheets may not accelerate as quickly as previously thought.

Thermal expansion of seawater and melting continental ice sheets relevant to global warming are tiny effects relative to secular sea level change of ancient times.

To see how fast sea level may rise in the future, Carlson and his team looked to the ancient Laurentide ice sheet, which stretched as far south as Ohio and New York City during at the peak of the last Ice Age 20,000 years aice sheet, which stretched as far south as Ohio and New York City during at the peak of the last Ice Age 20,000 years aIce Age 20,000 years ago.

They based their findings on analysis of the chemical isotopes locked in ancient ice from the Weddell Sea embayment, and the evidence suggests that in the past, when polar waters became more stratified, the ice sheets melted much more quickly.

For their study, Hansen and his colleagues combined ancient paleo - climate data with new satellite readings and an improved model of the climate system to demonstrate that ice sheets can melt at a «non-linear» rate: rather than an incremental melting as Earth's poles inexorably warm, ice sheets might melt at exponential rates, shedding dangerous amounts of mass in a matter of decades, not millennia.

The most direct evidence comes from tiny bubbles of ancient air trapped in the vast ice sheets of Antarctica.

They have focused on looking at the warmer climates of the Cenozoic (the Pliocene, etc.) to avoid the confusion from the response of ice sheets to orbital forcing during the ice age cycles of the Pleistocene, but obviously have significant uncertainties due to less precision about ancient greenhouse gas levels.

See also: Antarctic Octopus Genes Contain Clues About Ancient Catastrophic Ice Sheet Collapse