Abrupt rise in greenhouse gases at end of last ice age may be because of permafrost

ENN
Nov 20, 2014, 12:30 pm56 pts
One of the most abrupt rises in the carbon dioxide concentration in the atmosphere at the end of the last ice age took place about 14,600 years ago. Ice core data show that the CO2 concentration at that time increased by more than 10 ppm (parts per million, unit of measure for the composition of gases) within…

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