10. Approximately how many glacial / interglacial cycles have occurred over the last 2.5 million years? What are these driven by?

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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10. Approximately how many glacial / interglacial cycles
have occurred over the last 2.5 million years? What are
these driven by?
11. The below diagram shows an 800,000 year record
atmospheric CO2 extracted from air bubbles trapped in
Antarctic Ice cores. What was the average atmospheric CO2
concentration during a glacial period? How about during
an interglacial period? How do both of those numbers
compare to modern values?
April 07, 2021
Ice-core data before 1958. Mauna Loa data after 1958.
400
350
300
250
200
150
500
400
300
200
Thousands of Years Ago
CO₂ Concentration (ppm)
800
700
600
1
100
0
Transcribed Image Text:10. Approximately how many glacial / interglacial cycles have occurred over the last 2.5 million years? What are these driven by? 11. The below diagram shows an 800,000 year record atmospheric CO2 extracted from air bubbles trapped in Antarctic Ice cores. What was the average atmospheric CO2 concentration during a glacial period? How about during an interglacial period? How do both of those numbers compare to modern values? April 07, 2021 Ice-core data before 1958. Mauna Loa data after 1958. 400 350 300 250 200 150 500 400 300 200 Thousands of Years Ago CO₂ Concentration (ppm) 800 700 600 1 100 0
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