GEOL 1 Lecture Notes - Lecture 16: Solar Irradiance, Ice Age, Global Cooling
21 Sep 2020
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Document Summary
Slowly causing the temperature of earth to increase. 1980 (large glaciers) vs. 2002 (no glaciers) Coming out of the most recent ice age. Natural processes (ex: changes in albedo) account for 50 percent of warming over. The warming is occurring faster and has a greater magnitude than the the past few centuries. other warming trends e have data for in recent history. Have risen exponentially over the last 200 years. Conclusion: around 50% of the temperature increase of the last 250 years is due to greenhouse gas buildup. To argue against this, you have to have a better hypothesis that is consistent with the facts. Fossil fuel burning since the industrial revolution has added ggs to the atmosphere. No increase similar to the current one. Does not prove where the co2 has come from. Investigating which carbon isotopes are building up. Reduced concentration of 14c/12c in the atmosphere as a consequence of fossil fuel burning.
