Info: Each glacial period is followed by an interglacial period in which temperatures rise and the ice retreats. The Milankovitch cycles are not strong enough by themselves to cause the shift. What they do is get the ball rolling. A decrease in solar energy hitting the Arctic allows sea ice to form in winter and remain over summer, then to expand its reach the following year. The ice reflects more solar energy back to space. A colder ocean stores more CO2, which further dampens the greenhouse effect.
Conversely, when ocean temperatures raise, more CO2 escapes into the atmosphere where it traps more solar energy. With so many factors at play, each swing of the climate pendulum has produced its own unique conditions. Take, for example, the last interglacial, known as ...
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