Sentences with phrase «from polar ice cores»

A contributor to the famous «hockey stick graph», he specialises in mining historic climate data from polar ice cores.

Climate forcings due to past changes in GHGs and surface albedo can be computed for the past 800000 years using data from polar ice cores and ocean sediment cores.

Past changes in atmospheric greenhouse gas concentrations can be determined with very high confidence from polar ice cores.

Not exact matches

But when Lavigne's team examined shards of volcanic glass from this volcano, they found that they didn't match the chemical composition of the glass found in polar ice cores, whereas the Samalas glass is a much closer match.

Although scientists have analysed gases from tiny bubbles trapped in ice cores drilled in polar ice caps, there are doubts about how closely the composition of the bubbles matches that of the atmosphere at the time they were trapped (see New Scientist, Science, 22 August).

Although it was not a true ice age, the term was introduced It is not uncommon to read that ice cores from the polar regions contain records of climatic change from the distant past.

We know this because of the ice core analysis from the polar regions both north and south.

Has anyone yet talked up designing a Mars lander that would be able to drill a core from the polar ice cap, scan it and give us another data set?

Andy — As far back as Severinghaus et al (Timing of abrupt climate change at the end of the Younger Dryas interval from thermally fractionated gases in polar ice, 1998, Nature), the ice - core data showed clearly that the abrupt climate changes (end of the Younger Dryas in that case) were faster than the methane changes.

Over the last 35 years, our research team has recovered ice - core records of climatic and environmental variations from the polar regions and from low - latitude high - elevation ice fields from 16 countries.

For periods before 1958, CO2 levels are determined from air bubbles trapped in polar ice cores.

The World Data Center (WDC) for Paleoclimatology maintains archives of ice core data from polar and low - latitude mountain glaciers and ice caps throughout the world.

They determined this by taking ice cores 400 miles from the South Pole in the polar plateau of East Antarctica.

The following are more of interest: — «Winter Sampling of Shallow Firn Air at the South Pole to Understand Processes Affecting Firn Atmospheric Histories and Ice Core Gas Records» by Severinghaus (2000), — «Thermal fractionation of air in polar firn by seasonal temperature gradients» by Severinghaus, Grachev & Battle (2001), — «Severinghaus et al. «Fractionation of gases in polar ice during bubble close - off: New constraints from firn air Ne, Kr and Xe observations» by Severinghaus & Battle (2006), but all follow the same line of reasoniIce Core Gas Records» by Severinghaus (2000), — «Thermal fractionation of air in polar firn by seasonal temperature gradients» by Severinghaus, Grachev & Battle (2001), — «Severinghaus et al. «Fractionation of gases in polar ice during bubble close - off: New constraints from firn air Ne, Kr and Xe observations» by Severinghaus & Battle (2006), but all follow the same line of reasoniice during bubble close - off: New constraints from firn air Ne, Kr and Xe observations» by Severinghaus & Battle (2006), but all follow the same line of reasoning.

From ice core data we can see that on approximately 1,500 - year cycles, the northern polar region has warmed while the southern polar region has cooled.

What is striking though, is that amidst all the criticism nobody has challenged our core finding: blogs on which man - made climate change and its impacts are downplayed are far removed from the scientific literature, at least regarding the topic of shrinking Arctic sea ice and the resulting future threat to polar bears.

In the past decade, scientists have documented similar dust peaks in polar ice cores, and in sediments from the Atlantic and Indian oceans, but records from Pacific were contradictory.

Nice plot: http://www.climate-change-theory.com/planetcycles.jpg When do you expect the next deep freeze that empties 125m of water from the seas to ice in the polar and N / S latitudes per the Ice Core 120,000 y cycling patteice in the polar and N / S latitudes per the Ice Core 120,000 y cycling patteIce Core 120,000 y cycling pattern?

A geologist can take soil samples, sample cores taken from a tropical ocean or sample cores from beneath the polar ice caps.