BIOLOGY 290 Lecture Notes - Lecture 5: Arable Land, Global Warming, Keeling Curve
15 Sep 2016
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Document Summary
Intergovernmental panel on climate change: one thing they agree on is the more carbon dioxide going into the air, the global temperature on average will increase; estimated 3 degrees celcius by the end of the century. In the past, as far back as 400 thousand years, carbon dioxide would fluctuate a lot from 200 to 300 ppm; now, carbon dioxide has reached 400 ppm which has never happened, or even approached in the past. The keeling curve: terrestrial ecosystems on average are more productive this produces an annual oscillation of carbon dioxide, which maxes in april and minimum in sept; decreases in. Northern hemisphere summer b/c n hemisphere has greater landmass. The greenhouse effect: the more carbon dioxide in the atmosphere, the more solar radiation is reflected back to the earth"s surface: greenhouse gases: carbon dioxide, methane, nitrous oxide, etc. 2015 was the warmest year on record, at least since 1880, when weather data began being.
