Sentences with phrase «ice core analysis by»

Ice core analysis by Dansgaard's group, confirmed by the Americans, showed rapid oscillations of temperature repeatedly at irregular intervals throughout the last glacial period.

Not exact matches

Extraction of the WAIS - Divide ice core and analysis in DRI's laboratory were funded by the U.S. National Science Foundation (NSF).

Rather the cores require a more complicated analysis that is becoming more difficult by the day as the ice melts.

1966 Emiliani's analysis of deep - sea cores shows the timing of ice ages was set by small orbital shifts, suggesting that the climate system is sensitive to small changes.

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.

Space analysis demonstrates that while there is a high consistency between phenomena spacing (highlighted in bold), ice core dates are offset by approximately 7 years.

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.

Recent analysis of the Greenland ice cores, by Chylek et al., has proven that the powerful AMO variability has been part and parcel of the Greenland climate for thousands of years, pushing temperatures higher and lower depending on the cycle point.

The problem with your analysis is that the ice cores already reflect the ocean temperature by measuring the ratio of Deuterium to Hydrogen based on the difference in the relative evaporation of each, vs. temperature.

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.

Wenk Physics Institute, University of Bern, CH — 3012 Bern, Sidlerstrasse 5, Switzerland Studies on air trapped in old polar ice1, 2 have shown that during the last ice age, the atmospheric carbon dioxide concentration was probably significantly lower than during the Holocene — about 200 p.p.m. rather than 270 p.p.m.. Also, Stauffer et al. 3 recently showed by detailed analyses of Greenland ice cores, that during the ice age, between about 30,000 and 40,000 yr BP, the atmospheric CO2 level probably varied between 200 and 260 p.p.m..

Climate change doubters used this analysis to support their belief that — despite climatological data which includes 800,000 year ice - core records of atmospheric carbon dioxide — humans have not affected the atmosphere by releasing billions of tons of carbon dioxide per year.

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.

Two comprehensive chapters on dating methods provide the foundation for all paleoclimatic studies and are followed by up - to - date coverage of ice core research, continental geological and biological records, pollen analysis, radiocarbon dating, tree rings and historical records.

1966 Emiliani's analysis of deep - sea cores and Broecker's analysis of ancient corals show that the timing of ice ages was set by small orbital shifts, suggesting that the climate system is sensitive to small changes.

That ice core analysis (as shown by Al Gore in his movie) shows that for hundreds of thousands of years, CO2 and temperatures have moved together, demonstrating that CO2 is the main thermostat of the Earth

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.