An abrupt climate change occurs when the climate system is forced to transition to a new state at a rate that is determined by the climate system itself, and which is more rapid than the rate of change of the external forcing. Past events include the end of the Carboniferous Rainforest Collapse, Younger Dryas, Dansgaard-Oeschger events, and possibly also the Paleocene-Eocene thermal maximum. The term is also used within the context of global warming to describe sudden climate change that is detectable over the time-scale of a human lifetime. One proposed reason for the observed abrupt climate change is that feedback loops within the climate system both enhance small perturbations and cause a variety of stable states.
Timescales of events described as 'abrupt' may vary dramatically. Changes recorded in the climate of Greenland at the end of the Younger Dryas, as measured by ice-cores, imply a sudden warming of +10°C within a timescale of a few years. Other abrupt changes are the +4 °C on Greenland 11,270 years ago or the abrupt +6 °C warming 22 000 years ago on Antarctica. By contrast, the Paleocene-Eocene Thermal Maximum may have initiated anywhere between a few decades and several thousand years.
Read more about Abrupt Climate Change: Definitions, Current Situation, Regional Changes, Ocean Effects, Climate Feedback Effects, Past Events, Abrupt Climate Shifts Since 1976, Consequential Effects
Famous quotes containing the words climate and/or change:
“The climate of Ohio is perfect, considered as the home of an ideal republican people. Climate has much to do with national character.... A climate which permits labor out-of-doors every month in the year and which requires industry to secure comfortto provide food, shelter, clothing, fuel, etc.is the very climate which secures the highest civilization.”
—Rutherford Birchard Hayes (18221893)
“The real sadness of fifty is not that you change so much but that you change so little.”
—Max Lerner (b. 1902)