Sentences with phrase «in ancient ice»

1800 - 1870 Level of carbon dioxide gas (CO2) in the atmosphere, as later measured in ancient ice, is about 290 ppm (parts per million).

For example, ice cores taken in various locations around the world (Greenland and Antarctica, for example) are excellent proxies; gas bubbles containing CO2 trapped in ancient ice can be measured, and the age can be determined very accurately (by counting the seasonal ice layers, or measuring the isotope levels of oxygen).

They drill down into glaciers and study the bubbles of air trapped in ancient ice to find more information that can either prove or disprove an important hypothesis.

Hints that warming is being caused by emissions from industry and other human activities have been extracted from air bubbles trapped in ancient ice, from variations in tree rings, from the quick retreat of alpine glaciers.

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.

They measured evidence of atmospheric carbon dioxide, trapped in ancient ice cores, and found a lower limit.

Level of carbon dioxide gas (CO2) in the atmosphere, as later measured in ancient ice, is about 290 ppm (parts per million).

Scientists know that from studying air bubbles trapped in ancient ice in Greenland and Antarctica.

Not exact matches

Detailed ana / lysis of acient ice cores can be found in the paper: «Microbial Ana.lyses of Ancient Ice Core Sections from Greenland and Antarctica» — Caitlin Knowlton, Ram Veerapaneni, Tom D'Elia, and Scott O. Roice cores can be found in the paper: «Microbial Ana.lyses of Ancient Ice Core Sections from Greenland and Antarctica» — Caitlin Knowlton, Ram Veerapaneni, Tom D'Elia, and Scott O. RoIce Core Sections from Greenland and Antarctica» — Caitlin Knowlton, Ram Veerapaneni, Tom D'Elia, and Scott O. Roger

Telescopes spied water in ice caps at the Red Planet's poles, as well as signs of an ancient ocean covering the northern hemisphere.

The researchers were studying ancient soil composition in an exposed Siberian riverbank in 1995 when they discovered the first of 70 fossilized Ice Age squirrel burrows, some of which stored up to 800,000 seeds and fruits.

This band of malleable ice (center) may have flowed upward between two ancient terrains on Jupiter's moon Ganymede in a process similar to seafloor spreading on Earth.

A prime spot to go looking for ancient epigenetic signals is in permafrost that formed during the last ice age.

Encased in ice for 4,000 years, a clump of prehistoric human hair gave up its secrets to the University of Copenhagen's Eske Willerslev, the first researcher to sequence an ancient human genome.

Germonpré and colleagues have studied skulls and jawbones of even more ancient canids in caves and other places where Ice Age people lived more than 25,000 years ago.

Meanwhile striking news came from studies of ancient climates recorded in Antarctic ice cores.

A fresh hypothesis suggests that the chaotic terrain in and around Aram Chaos resulted when a buried ice lake trapped in the ancient impact crater suddenly collapsed.

In North America, the Ice Age was marked by the mass extinction of several dozen genera of large mammals, including mammoths, mastodons, American horses, Western camels, two types of deer, ancient bison, giant beaver, giant bears, sabre - toothed cats, giant bears, American cheetahs, and many other animals, as well as plants.

The ancient heritage of water ice in the solar system.

Scientists can determine ancient atmospheric concentrations by measuring CO2 and methane levels in tiny air bubbles trapped in such ice, formed when the ice fell to the earth as snow.

NASA scientists prepare for an unprecedented look at the Red Planet's ancient seas and modern ice fields — key sites in the ongoing search for life.

In 2005, the European Consortium for Ice Coring in Antarctica (EPICA) drilled an ice core in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.002In 2005, the European Consortium for Ice Coring in Antarctica (EPICA) drilled an ice core in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.00Ice Coring in Antarctica (EPICA) drilled an ice core in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.002in Antarctica (EPICA) drilled an ice core in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.00ice core in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.002in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.002).

Confirmation of this idea requires a direct record of the ancient atmosphere — and this can be recovered by analysing the air that became trapped in tiny bubbles within ice as the snow it formed from fell to Earth.

When you drop in a small fragment of ancient ice, it provides that seed: the water instantly organizes itself to mimic the prehistoric pattern.

Geology graduate student Sean Mackay exposes ancient ice buried beneath rubble in Beacon Valley.

The finds lend support to a scenario of an ancient «iceball Mars» in which ice encased much of the planet.

A series of robotic missions, from Viking in the 1970s to the Spirit rover still roaming Mars today, have observed ancient riverbeds and polar ice caps storing enough water to submerge the entire planet in an ocean 40 feet deep.

These are the direct descendants of the people who settled the Americas after the last Ice Age — the same people Baker sometimes studies in her work with ancient bones.

Of predictable discoveries, one can forecast several: another great Ice Age painted cave like Lascaux or Chauvet; a rich Egyptian burial, perhaps as fine as Tutankhamen's; an ancient city buried under sediment in the valley of one of the great west Asian rivers; and a rich cache under the heart of a great Mesoamerican city.

It may also explain why other bodies in the Kuiper belt are unusually bright, the researchers say: Fresh ice is typically much brighter than an ancient stagnant surface on which dust and substances produced by interactions with sunlight or other radiation have built up through the ages.

In conditions that redefine the word «cold» for this native Tennessean, White drills through ancient ice to unlock clues to the Earth's past climate — and predict its future.

«Ice cave in Transylvania yields window into region's past: Scientists conduct ancient climate research on oldest cave glacier in the world.»

«We knew that the Yamnaya had this big genetic component that we couldn't place, and we can now see it was this ancient lineage hiding in the Caucasus during the last Ice Age,» said Manica.

When the ice age ended, these ancient species and other, more recent ones were ready to take advantage of habitats that opened up in the mountains» higher elevations — and the plants and trees speciated like mad.

From there they could control a fleet of robotic explorers and investigate the composition of ancient ice deposits in the forever - dark craters of the Aitken basin.

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.

By measuring the bonds of prehistoric alkenones preserved in ancient layers of lake sediment, the team opened a window on Arctic temperature change since the end of the last Ice Age.

«Some of the observed features included ancient river beds, craters, massive extinct volcanoes, canyons, layered polar deposits, evidence of wind - driven deposition and erosion of sediments, weather fronts, ice clouds, localized dust storms, morning fogs and more,» NASA wrote in a summary of the mission.

A new study has found geochemical clues near the summit of volcanic Mauna Kea that tell a story of ancient glacier formation, the influence of the most recent ice age, more frequent major storms in Hawaii, and the impact of a distant climatic event that changed much of the world.

As Dr. Warner explains, we know since the famous bath - tub experiment by the ancient Greek scientist Archimedes, water levels will not rise when ice in water melts.

In Earth's solar system, evidence of subsurface ice, ancient valley networks, and even an ancient ocean occurs on the planet Mars.

Two new studies suggest that during ice ages, steep drops in temperature may have sent ancient species moving to warmer areas.

ICE CAMP: It's summer in Antarctica when Rochester Ice Core Lab researchers and their international colleagues arrive at Taylor Glacier to spend seven weeks collecting ancient samples of ice and extracting the gases trapped withICE CAMP: It's summer in Antarctica when Rochester Ice Core Lab researchers and their international colleagues arrive at Taylor Glacier to spend seven weeks collecting ancient samples of ice and extracting the gases trapped withIce Core Lab researchers and their international colleagues arrive at Taylor Glacier to spend seven weeks collecting ancient samples of ice and extracting the gases trapped withice and extracting the gases trapped within.

DEEP FREEZE: Petrenko holds a sample of ancient ice in his Ice Core Lab in Hutchison Haice in his Ice Core Lab in Hutchison HaIce Core Lab in Hutchison Hall.

Scientists see it in tree rings, ancient coral and bubbles trapped in ice cores.

A group of species found in southern California experienced ancient hybridization dating to the Ice Age.

In a new study out last month in the journal Nature, a team of scientists from Cambridge and Sweden point to evidence from thousands of scratches left by ancient icebergs on the ocean floor, indicating that Pine Island's glaciers shattered in a relatively short amount of time at the end of the last ice agIn a new study out last month in the journal Nature, a team of scientists from Cambridge and Sweden point to evidence from thousands of scratches left by ancient icebergs on the ocean floor, indicating that Pine Island's glaciers shattered in a relatively short amount of time at the end of the last ice agin the journal Nature, a team of scientists from Cambridge and Sweden point to evidence from thousands of scratches left by ancient icebergs on the ocean floor, indicating that Pine Island's glaciers shattered in a relatively short amount of time at the end of the last ice agin a relatively short amount of time at the end of the last ice age.

Heat trapping greenhouse - gas emissions are the obvious culprit, since they've increased dramatically over that same 50 years, but scientists prefer hard evidence to presumption, so a team from the British Antarctic Survey has been drilling into ancient ice to see how the current warming stacks up against what happened in the ancient past.

Ancient Russians also frequently bathed in ice cold rivers for health and spiritual cleansing.