Lecture 26-new - Lecture26:AbruptClimate Change ,and

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Lecture 26: Abrupt Climate Change Some kinds of climate change occur abruptly, over time intervals of less than 100 years, and change regional or global climates from one state to a significantly different state.
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Sub-Milankovich Climate Change There are some types of observed climate change that occur too fast to be caused by Plate Tectonics or Milankovich Cyclicity. We will lump these together and call them sub-Milankovich-scale climate change. Most of these faster climate changes happen on time scales of a few thousand years or less.
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Sub-Milankovich-Scale Climate Variability Millenial-scale variability: Dansgaard- Oeschgar cyclicity Centennial-scale variability: Little Ice Age (1300-1850 AD), Middle Ages Climate Optimum (1000-1200 AD) Decadal variability (ENSO, PDO) Abrupt Climate Change
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Dansgaard-Oeschgar Cyclicity (DO cyclicity), operates on time scales of 1-2,000 years.
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Yearly Average Summer Winter Central England Climate Variability For the last 1000 years.
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