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Changes in the Air To assess the impact of human activity on the carbon dioxide level in Earth’s atmosphere, it helps to take a long view. One useful data set comes from deep core samples of Antarctic ice. The oldest ice core that has been fully analyzed dates back a bit more than 400,000 years. Air bubbles trapped in the ice provide information about the gas content in Earth’s atmosphere at the time the ice formed. Combining ice core data with more recent direct measurements of atmospheric carbon dioxide—as in FIGURE 46.13 —can help scientists put current changes in the atmospheric carbon dioxide into historical perspective. FIGURE 46.13 Changes in atmospheric carbon dioxide levels (in parts per million) . Direct measurements began in 1980. Earlier data are based on ice cores. The Industrial Revolution occurred around 1800. What was the trend in carbon dioxide levels in the 800 years prior to this event? What about in the 175 years after it?

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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
BuyFind

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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Chapter
Section
Chapter 46, Problem 3DAA
Textbook Problem

Changes in the Air To assess the impact of human activity on the carbon dioxide level in Earth’s atmosphere, it helps to take a long view. One useful data set comes from deep core samples of Antarctic ice. The oldest ice core that has been fully analyzed dates back a bit more than 400,000 years. Air bubbles trapped in the ice provide information about the gas content in Earth’s atmosphere at the time the ice formed. Combining ice core data with more recent direct measurements of atmospheric carbon dioxide—as in FIGURE 46.13—can help scientists put current changes in the atmospheric carbon dioxide into historical perspective.

Chapter 46, Problem 3DAA, Changes in the Air To assess the impact of human activity on the carbon dioxide level in Earths

FIGURE 46.13 Changes in atmospheric carbon dioxide levels (in parts per million). Direct measurements began in 1980. Earlier data are based on ice cores.

The Industrial Revolution occurred around 1800. What was the trend in carbon dioxide levels in the 800 years prior to this event? What about in the 175 years after it?

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