Ice Core from Vostok, Antarctica
¥During last ice age (>18,000 years ago)
¥ Temps 6oC colder
¥ CO2 levels 30% lower
¥ CH4 levels 50% lower
¥ H2O levels were lower
¥than current interglacial.
¥
¥130,000 years ago it was a bit warmer than today
¥
¥50% change in CO2 associated with 8oC change in temperature
¥6-8oC decrease in temperature produced incredibly different climate: Ice Age