Deglacial%20Climate%20Change

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Deglacial Climate Change
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Radiocarbon dates showing the retreat of the N.
American ice sheet
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Coral data provided data on the rate of sea level
change
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Proxy records provide evidence for a cold episode
(Younger Dryas) that interrupted the deglacial
process.
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The Greenland ice cores show rapid (lt100 yrs)
changes in ice accumulation and dust.
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Routes of meltwater flow
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Deglaciation flooding of coastlines
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Tropical monsoons were stronger in the northern
hemisphere 9,000 yrs ago
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Proxy records also show tropical monsoon maximum
9,000 yrs ago.
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Decreased summer insolation in the northern
tropics has produced weaker tropical monsoons.
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Decreased summer insolation at high northern
latitudes during the last 6,000 yrs coincides
with cooler temperatures.
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Humans and Paleoclimate
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The spread of agriculture
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Quelccaya ice cap in Peru
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The Little Ice Age could have resulted from
orbital-scale cooling or from a millennial-scale
oscillation.