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La originala priskribo estas: Graph of CO 2 (Green graph), temperature (Blue graph), and dust concentration (Red graph) measured from the Vostok, Antarctica ice core as reported by Petit et al., 1999. Higher dust levels are believed to be caused by cold, dry periods.
Vostok 3 was the first core to retrieve ice from the previous glacial period, 150,000 years ago. [113] Drilling was interrupted by a fire at the camp in 1982, but further drilling began in 1984, eventually reaching 2546 m in 1989. A fifth Vostok core was begun in 1990, reached 3661 m in 2007, and was later extended to 3769 m.
Graph of reconstructed temperature (blue), CO 2 (green), and dust (red) from the Vostok Station ice core for the past 420,000 years. To geologists, an ice age is defined by the presence of large amounts of land-based ice.
Note that the Vostok core is deeper, but does not extend as far back in time. Note also that the y-axis offset between the EPICA and Vostok cores in delta-deuterium is real: Vostok is a colder site, hence has more negative delta. Differences in the apparent age of events are likely to be inaccuracies in converting ice depth to age. Date: 20 ...
Oh there's much more involved than CO2 alone, which was just varying by a hundred ppm here. It isn't the primary driver of the ice age cycle. This graph is kind of misleading actually if you see it in isolation. Over thousands of years, Earth's orbit, tilt, and precession varies a bit in a pattern that initiates ice ages.
500 million years of climate change Ice core data for the past 400,000 years, with the present at right. Note length of glacial cycles averages ~100,000 years. Blue curve is temperature, green curve is CO 2, and red curve is windblown glacial dust (loess).
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Over 400,000 years of ice core data: Graph of CO 2 (green), reconstructed temperature (blue) and dust (red) from the Vostok ice core (from Carbon dioxide in Earth's atmosphere) Image 5 Concentration of atmospheric CO 2 over the last 40,000 years, from the Last Glacial Maximum to the present day.