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Lecture 23 - Cenozoic History of Climate Change
Terms in this set (12)
The current climate can be referred to as
What is the mid-pleistocene revolution?
A change of duration of the glacial-interglacial cycles from 40,000 to 100,000 years
The partial and full desiccation events in the Mediterranean Sea (Messinian slainity crisis) are due to which effect?
Growth of Antarctic ice sheets
What is the correct average carbon dioxide (CO2) level in the atmosphere?
What was the maximum carbon dioxide (CO2) level for much of the Pleistocene (2.5 My to 10 ky ago)?
300 ppm; 0.03%; 0.3‰; ALL OF THE ABOVE
What climate oscillation characterizes the Pleistocene?
Succession of glacial and inter-glacial periods; Climate variations linked to the Milankovitch cycle; Large variations of sea level over cycles of 41 and 100 kyr; ALL OF THE ABOVE
What is the Mid-Pleistocene revolution?
A change of periodicity of Ice Ages from 41 kyr to 100 kyr
Heinrich events are large deposits of rocks of glacial origin in marine sediments in the Atlantic Ocean basin. What do they indicate?
Large ice sheet instabilities during Ice Ages
What is the Younger Dryas?
An abrupt change in climate at the end of the Pleistocene
What climate event coincided with the development of Human civilization?
The end of the Younger Dryas and start of the Holocene interglacial period
How was the sea level at the Last Glacial Maximum?
120 m below current level
What are the characteristics of the Little Ice Age (1300-1800)?
Drop of mean temperatures in western Europe by 1ºC; Lowering of the snowline by 100 m; Famines and human migrations; ALL OF THE ABOVE
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