Sentences with phrase «studying glacial ice»

Scientists are able to determine CO2 levels from hundreds of centuries ago by studying glacial ice.

Not exact matches

One of the studies, led by University of Vermont geologist Paul Bierman, concludes that East Greenland — like the coastal scene shown in this image from near Tasiilaq — has been actively scoured by glacial ice for much of the last 7.5 million years.

«Ice shapes the landslide landscape on Mars: A new study uses a combination of glacial morphology and remote sensing measurement to explore the role of ice in shaping Martian landslides.&raqIce shapes the landslide landscape on Mars: A new study uses a combination of glacial morphology and remote sensing measurement to explore the role of ice in shaping Martian landslides.&raqice in shaping Martian landslides.»

«Ice age bison fossils shed light on early human migrations in North America: Study dates the first movements of bison through an ice - free corridor that opened between the ice sheets after the last glacial maximum.&raqIce age bison fossils shed light on early human migrations in North America: Study dates the first movements of bison through an ice - free corridor that opened between the ice sheets after the last glacial maximum.&raqice - free corridor that opened between the ice sheets after the last glacial maximum.&raqice sheets after the last glacial maximum.»

The sediment cores used in this study cover a period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like tglacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like tGlacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like today's.

Building on this study, the team intend to produce a new reconstruction of global ice volume across the last glacial cycle, which will help to validate their proposition that certain boundaries can define windows of instability within the climate system.

«Scientists throw light on mysterious ice age temperature jumps: New study reveals carbon dioxide «tipping point» that triggered abrupt warming during glacial periods.»

«Studies have shown that both the Greenland and Antarctic ice sheets contributed significantly to this sea level rise above modern levels,» said Anders Carlson, an Oregon State University glacial geologist and paleoclimatologist, and co-author on the study.

An early study suggested that these pingos formed on land during the glacial period, and are therefore relics from the ice age, just like the Arctic subsea permafrost.

According to the study, published in the International Glaciological Society's Journal of Glaciology, the first decade of the twenty - first century witnessed a «historically unprecedented» rate of glacial ice melt.

According to a new study, published in the International Glaciological Society's Journal of Glaciology, the first decade of the twenty - first century witnessed a «historically unprecedented» rate of glacial ice melt.

A 3 - D model for the Antarctic ice sheet: a sensitivity study on the glacial - interglacial contrast.

At this early stage of knowledge, what was being studied were the glacial periods within the past few hundred thousand years, during the current ice age.

On the studies of sensitivity based on the last glacial maximum, what reduction in solar forcing is used based on the increased Albedo of the ice - sheets, snow and desert.

Be that as it may, all these studies, despite the large variety in data used, model structure and approach, have one thing in common: without the role of CO2 as a greenhouse gas, i.e. the cooling effect of the lower glacial CO2 concentration, the ice age climate can not be explained.

26 Paul W asked, «On the studies of sensitivity based on the last glacial maximum, what reduction in solar forcing is used based on the increased Albedo of the ice - sheets, snow and desert.

For example, the young geologist student can study the recent effects on the landscape of rapidly retreating glacial ice.

The research drew lessons from paleoclimate studies of the Last Glacial Maximum, the cold peak of the last ice age, that relate to the extent of warmth possible in an era of accumulating greenhouse gases:

On the studies of sensitivity based on the last glacial maximum, what reduction in solar forcing is used based on the increased Albedo of the ice - sheets, snow and desert.

A study using data taken from fossils and ice cores finds that long - term temperature variability decreased four-fold from the Last Glacial Maximum (LGM) around 21,000 years ago to the start of the Holocene around 11,500 years ago.

Since current ice melt data could indicate variable climate trends and aren't necessarily part of an accelerating trend, the study warned that predictions of future sea - level rise should not be based on measurements of glacial loss» Daily Mail.

And what study do you have that shows a constant or growing glacial ice balance?

Meanwhile, this biomarker approach has been used successfully in many studies dealing with the reconstruction of Arctic sea ice history during the last glacial to Holocene time interval, i.e., the last about 30 ka31, 32,33,34,35,36,37.

It is the first study to directly link past glacial events with annual data from ice cores — cylindrical samples drilled from the glacier — extracted from the same ice mass.

And study authors found that 2 C to 5 C warming of local ocean waters with somewhat greater local air temperature increases was capable of flooding these basins in stages — forcing Totten's glacial ice to flow out into the Southern Ocean and provide significant contributions to sea level rise.

The scientists focused their study on four large glaciers in Nepal's Dudh Kosi river basin, which holds 400 square kilometres of glacial ice.

Scientists from the Center for Arctic Gas Hydrate (CAGE), Environment and Climate at the Arctic University of Norway, published a study in June 2017, describing over a hundred ocean sediment craters, some 3,000 meters wide and up to 300 meters deep, formed due to explosive eruptions, attributed to destabilizing methane hydrates, following ice - sheet retreat during the last glacial period, around 12,000 years ago, a few centuries after the Bølling - Allerød warming.

One author, speculating about the coming of a new ice age, pointed to «evidence of (at least) five rapid hemispheric coolings of about 5 °C... each event spread over not more than about a century,» Flohn (1974), quote p. 385; one line of evidence was carbon - 14 studies of tree stumps in glacial deposits: Denton and Karlén (1973).

Harder, S.L., D.T. Shindell, G.A. Schmidt, and E.J. Brook, 2007: A GCM study of CH4 emissions during the Holocene and glacial - interglacial transitions constrained by ice core data.

Scientists from the Lamont Doherty Earth Observatory (LDEO) have provided new evidence that ocean circulation changes lagged behind, and were not the cause of, major climate changes at the beginning and end of the last ice age (short intervals known as glacial boundaries), according to a study published in the March 2005 issue of Science magazine.