Oxygen isotopic ratios in the dating of ice cores soul find dating single site
However, they provide no direct analogue for the future because the ice core era contains no periods with concentrations of CO2 comparable to those of the next century.
Looking at the warming out of the last glacial period in detail, we can see how remarkably closely Antarctic temperature and CO that was not accompanied by an increase in temperature.By measuring the ratios of different water isotopes in polar ice cores, we can determine how temperature in Antarctica and Greenland has changed in the past.The oldest ice core we have was drilled by the European Project for Ice Coring in Antarctica (EPICA) from Dome C on the Antarctic plateau.was stable over the last millennium until the early 19th century. isotopic data) confirm that the increase must be due to emissions of CO from fossil fuel usage and deforestation.It then started to rise, and its concentration is now nearly 40% higher than it was before the industrial revolution (see Fig. Measurements from older ice cores (discussed below) confirm that both the magnitude and rate of the recent increase are almost certainly unprecedented over the last 800,000 years.