GEOG 3105 Lecture Notes - Lecture 4: Photodissociation, Tropopause, Main Source
5 Mar 2018
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Document Summary
1824: jean-baptiste fourier says the earth would be colder without an atmosphere. 1859: john tyndall measures ir absorption of co2; recognizes link to climate. 1896: svante arrhenius calculates temperature would rise 5-6c if co2 doubled. 1940: guy stewart callendar saw that co2 had risen 10% and foresaw greenhouse warming as a problem. 1957: hans suess and roger revelle found that the ocean will not absorb as much co2 as thought. 1957: charles keeling begins co2 monitoring on mauna loa. Keeling curve: graph that plots the ongoing change in co2 co(cid:374)ce(cid:374)tratio(cid:374) i(cid:374) earth"s at(cid:373)osphere. Shows that co2 is increasing by > 2ppm/year and levels are at 400 ppmv. Increase in co2 concentration matches with records of fossil fuel extraction and consumption. Shows a seasonal increase and decrease in co2 concentration. A slight drop in o2 concentration corresponds to carbon that was burnt and/or oxidized.
