21.) What are ice ages? How has CO2 and temperature varied (give ranges) from gl

Question

21.) What are ice ages? How has CO2 and temperature varied (give ranges) from glacial to interglacial times? Explain the role of ice cores in model predictions of future global warming.

22.) What are positive feedbacks? What are negative feedbacks? Give three examples of each. What environmental conditions have been at “steady state” on earth due to the influences of life?

23.) Draw the CO2 concentration versus time at Mauna Loa for the last 5 years. What are the major features? Explain them.

24.) What may be some effects of global warming? How would you live your life differently? What can we do to slow or prevent global warming?

Explanation / Answer

21) Ice Ages are periods of time when huge areas of the earth's surface are filled with ice sheets (big continental glaciers).  

In the interglacial period the CO2 concentration was 262 -287 parts permillion by volume (p.p.m.v.).

In the glacial period CO2 concentration is below 250 parts permillion by volume (p.p.m.v.). in the total glacial period.

Temperature varied from colder to warmer from  glacial to interglacial times.

Explain the role of ice cores in model predictions of future global warming.

Scientists utilize the ice core temperature data to check the climate models which make predictions of future global warming.

So ice core temperature data validates the climate models.

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