Gradual warming, paradoxically, can trigger abrupt cooling. (williamcalvin.com)
They are the aforementioned «abrupt cooling episodes» but they could equally well be called «severe drought episodes» or «dust storm centuries.» (williamcalvin.com)
When orbital wiggles and rising greenhouse gases warmed the earth from the last ice age, proxy records show that smooth changes were interspersed with abrupt coolings and warmings, wettings and dryings. (nap.edu)