Carbon Dioxide and Global Temperatures. 10.7 Chapter 19 (pp. 525-534). Let’s explore the “evidence” that increased concentrations of greenhouse gases is causing the Earth to become warmer. Was this caused by human activities?
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Carbon Dioxide and Global Temperatures
Chapter 19 (pp. 525-534)
PROVED: CO2 levels are seasonal and concentration of CO2 is increasing each year
Global Temperatures and Greenhouse Gas Concentrations for the Past 400,000 years
Formaminifera: different species prefer different water temperatures
Air bubbles trapped in ice core samples
The figure below presents historical CO2 levels. Use the graph to determine the net change in atmospheric Carbon Dioxide concentration between 100,000 years ago and present day levels.
There was little change in concentration over 10,000 years, but DRASTIC change as of 1800
Baseline is average global temperatures 1901-2000