Events
First Climate ModelRoger Revelle and Hans E. Suess write that “human beings are now carrying out a large scale geophysical experiment” in a paper examining CO2 uptake by the oceans.Curve developed by American climate scientist Charles David Keeling begins to track atmospheric CO2 concentrations. CO2 concentration in 1960 ≈ 315 parts per million (ppm).First Oil Shock HappensIn 1974 the first evidence of chlorine chemicals being involved in ozone depletion is published.Second Oil Shock HappensCO2 Concentration is about 337 ppmthe first Intergovernmental Panel on Climate Change (IPCC) report notes the pattern of past warming while signaling that future warming is likely.The United Nations conference in Rio de Janeiro creates the UN Framework Convention on Climate Change.Kyto Protocol is Created with the intent to limit greenhouse gas emmisions, U.S. Dosen't sign on.CO2 Concentration is about 367 ppm.The third IPCC report notes that warming is very likely.Kyoto Protocol goes into effect.China becomes world's largest GHG emitter.The fourth IPCC report notes that effects of global warming are occurring.Canada Withdraws from the Kyoto Protocol.CO2 Concentration is about 400 ppm.Paris Agreement (Which replaces the Kyoto Protocol) is adopted by nearly 200 countries, including the U.S.Paris Agreement goes into effect.Sixth IPCC report notes unequivocally that human activity has brought widespread and rapid changes to the atmosphere, hydrosphere, and biosphere.Swedish chemist Svante Arrhenius became curious about how decreasing levels of CO2 in the atmosphere might cool Earth. In order to explain past ice ages, he wondered if a decrease in volcanic activity might lower global CO2 levels.This summer was the hottest on record (although many since then have been hotter).Periods
Gap of TimeThe era of large-scale petroleum development.Milutin Milankovitch publishes “Mathematical Climatology.Gap of TimeGap of TimeFoote experiments using glass cylinders demonstrated that the heating effect of the sun.Gap of Time
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