Dr. Archer has worked on the ongoing mystery of the low atmospheric CO2 concentration during glacial time 20,000 years ago, and on the fate of fossil fuel CO2 on geologic time scales in the future, and its impact on future ice age cycles, ocean methane hydrate decomposition, and coral reefs. (realclimate.org)
Moreover, it offers a better understanding of the link between orbital variations and climate change over geologic time scales. (co2coalition.org)
A couple of runs suggested climate could change in a few hundred years or less, which in geologic time scales means «instantly.» (realclimate.org)