Ahung Co, Tibet

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Ahung Co, Tibet
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The 8.2 ka event
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NCAR coupled model (CCSM3)
Mixed layer depths (m)
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Middle Holocene (3-7 ka) Abrupt Climate Change
The large fields produced no grain The flooded
fields produced no fish The watered garden
produced no honey and wine ... --From The Curse
of Akkad, written c. 4000 BP
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n130
Ice core Marine sediment Lake sediment Pollen
Speleothem Peat Loess
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Climate can change abruptly
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Temperatures since 1950 very likely (gt90
probability) warmer than any other 50-year period
in the last 500 years
IPCC 2007
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Rise in temperatures since 1950 is very likely
(gt90 probability) due to anthropogenic
greenhouse gases
IPCC 2007
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Paleoclimate research gives us a much longer
perspective to evaluate our understanding of the
climate system and how this system might respond
in the future Highly interdisciplinary
involving climatologists, oceanographers,
geologists, botanists, chemists, glaciologists
"The farther backward you can look,the farther
forward you are likely to see."- Winston
Churchill