Sentences with phrase «from ice core analysis»

I produced data from ice core analysis showing trends lasting tens of thousands of years.

This information was published in 2013 and involves hard data obtained from ice core analysis.

Not exact matches

Ice cores from Mount Hunter in Alaska's Denali National Park and Mount Logan in Canada were used in an analysis of over 1,000 years of history of the Aleutian Low pressure system that drives storm activity in the North Pacific.

The analysis focuses on two ice cores drilled in 2013 from Mount Hunter in Alaska's Denali National Park, and an older ice core from Canada's Mount Logan.

Analysis of data also shows that Ceres has a water - ice mantle surrounding a rocky core, and that there may still be at least pockets of liquid water beneath the surface, raising the prospect of potential habitability for microorganisms, as seemingly unlikely as that may sound for a world so far from the Sun.

The analyses of two ice cores from a southern tropical ice cap provide a record of climatic conditions over 1000 years for a region where other proxy records are nearly absent.

Dual Hemisphere Abrupt Climate Change Analysis from Greenland and Antarctic Ice Cores.

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

The CO2 level comes from half a dozen different ice core analyses, while the temperature data come from marine sediments, pollen analyses, isotopes, corals etc..

Time will tell of course — confirming studies from ice cores and independent analyses are already published, with more rumoured to be on their way.

These measurements, supplemented by analyses of air bubbles trapped in ice core samples, show unequivocally that atmospheric CO2 has increased from a pre-industrial level of 277 ppm in 1750 to present day concentrations that are approaching 390 ppm.

Figures A and B show past variations in the global mean temperature inferred from direct measurements (A) and from the analysis of ice - cores (B).

An analysis of the GISP2 ice core record from Greenland reveals that abrupt climate events appear to be paced by a 1,470 - year cycle with a period that is probably stable to within a few percent; with 95 % confidence the period is maintained to better than 12 % over at least 23 cycles.

«It potentially does,» admits Jones, but says that analyses using other methods — proxy temperature markers from ice core samples, for example — still show much the same temperature change over the past 1,000 years, backing up Mann's hockey stick.

Is it possible, therefore, for you to show a similar analysis of paleo data that has not been orbitally tuned — perhaps one of the long ice cores from Vostock?

Note: emissions are estimated independently of the model, based on chemical analysis of ice core samples from Greenland, industrial production, etc..

Through a combination of sediment cores analyses and ice - sheet modelling, the study shows that this area has probably been steadily leaking methane from hydrates for 8000 years.

Thomas van Hoof et al., «Atmospheric CO2 during the 13th Century AD: reconciliation of data from ice core measurements and stomatal frequency analysis,» Tellus, 2005, 57B, pp. 351 - 355, http://www.phys.uu.nl/~wal/research/papers/hoofetal2005.pdf 15.

This «new evidence» is based on a single analysis of «proxy» data (that is, data that do not come from thermometers but rather from sources like tree rings, ice cores, corals, and ocean and lake sediments) showing the twentieth century to be the warmest in the past thousand years.

The analyses of two ice cores from a southern tropical ice cap provide a record of climatic conditions over 1000 years for a region where other proxy records are nearly absent.

«Scientists using the latest analysis techniques, conducted a high resolution analysis of the ice core retrieved from Antarctica's Dome C station.

My immediately following (and more detailed) analyses of Wegman et al's sections on tree rings, as well as ice cores and coral proxies (also largely copied from Bradley's text book) eventually came to Bradley's attention, apparently via Richard Littlemore at Desmogblog.

Historical glacier movement, high resolution GISP2 ice core analysis, and crude temperature records from 17th century Europe suggest that it will.

78) A proper analysis of ice core records from the past 650,000 years demonstrates that temperature increases have come before, and not resulted from, increases in CO2 by hundreds of years.

I have done a rather detailed statistical analysis of the readily available NOAA ice core data from both Greenland and Antarctica.

The latter is a measure of the heliospheric shielding from cosmic rays derived from the analysis of cosmogenic isotope abundances in tree rings or ice cores, and is available with a time resolution of 2 − 3 solar cycles (Steinhilber et al. 2008).

As a layman, with just a smattering of climatology education, the one thing that sticks out above all else is that the subject is immensely complicated, and involves expert knowledge of dozens of entirely different disciplines from statistical analysis through thermodynamics to ice core study.

Is the CO2 analysis data from various ice cores such as Vostok using the sublimation technique available?

The paper, «Reconstruction of past atmospheric CO2 concentrations by ice core analysis», acknowledges that, due to impurities, liquid water can exist as low as -50 deg C. Diffusion of CO2 into this water, due to its far higher solubility than nitrogen and oxygen, will partially deplete the CO2 from trapped air bubbles.

Wunsh examined temperature records from several individual ice cores, and did a statistical analysis to show that very little of the temperature variation recorded could be explained by Milankovitch cycles.

The point of this remark is that no one up to present date has conducted any analysis of this sort on the ice core data, therefore my assertion that currently «you have no data of adequate quality from past proxies, so the argument of «unprecedented» growth can not be used» is perfectly valid and is true.

The earlier data comes from some sort of proxy analysis (ice cores, tree rings, sediments, etc.) While we know these proxies generally change with temperature, there are still a lot of questions as to their accuracy and, perhaps more importantly for us here, whether they vary linearly or have any sort of attenuation of the peaks.

These estimates resulted from studies of air bubbles recovered in ice cores from deep within Antarctica, Greenland and other glaciers, as well as chemical analyses of coral samples from beneath the sea.

I recall more than one guest lecture at our physics department's Centre for Global Change Studies displaying a graph of spectral analysis of temperature histories, with data from multiple time scale sources including thermometer records, ice core data, etc..

I have a feeling a lot of PhDs could get minted from extending your analysis here alone ---- does it hold for longer time series, using Vostok Ice Cores (not tree rings please!!)

In the 1970s, the first comprehensive analysis of oxygen isotopes in sediments from cores taken from the sea floor established for the first time that the timing of the Ice Ages was linked to subtle changes in the Earth's orbit around the Sun as suggested long ago by Serbian mathematician Milutin Milankovitch.