deglacial climate change
DESCRIPTION
Deglacial Climate Change. Radiocarbon dates showing the retreat of the N. American ice sheet. Coral data provided data on the rate of sea level change. Proxy records provide evidence for a cold episode (Younger Dryas) that interrupted the deglacial process. . - PowerPoint PPT PresentationTRANSCRIPT
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Deglacial Climate Change
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Radiocarbon dates showing the retreat of the N. American ice sheet
![Page 3: Deglacial Climate Change](https://reader036.vdocuments.mx/reader036/viewer/2022062521/5681675f550346895ddc3156/html5/thumbnails/3.jpg)
Coral data provided data on the rate of sea level change
![Page 4: Deglacial Climate Change](https://reader036.vdocuments.mx/reader036/viewer/2022062521/5681675f550346895ddc3156/html5/thumbnails/4.jpg)
![Page 5: Deglacial Climate Change](https://reader036.vdocuments.mx/reader036/viewer/2022062521/5681675f550346895ddc3156/html5/thumbnails/5.jpg)
Proxy records provide evidence for a cold episode (Younger Dryas) that interrupted the deglacial process.
![Page 6: Deglacial Climate Change](https://reader036.vdocuments.mx/reader036/viewer/2022062521/5681675f550346895ddc3156/html5/thumbnails/6.jpg)
The Greenland ice cores show rapid (<100 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.
![Page 12: Deglacial Climate Change](https://reader036.vdocuments.mx/reader036/viewer/2022062521/5681675f550346895ddc3156/html5/thumbnails/12.jpg)
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.