POLA01H3 Lecture Notes - Lecture 2: Agenda (Sky News Australia)
10 Dec 2015
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Document Summary
Greenhouse effect: solar radiation hits the earth and stays in the. Greenhouse gases: excess of greenhouse gas emissions, anthropogenic through burning of fossil fuels (coal, oil, gas) Global mean surface temperatures increased by 0. 89 c between 1901 and 2012. Almost the entire globe warmed between 1901 and 2012. Atmospheric carbon dioxide concentrations have increased by 40% since pre- industrial times, to levels unprecedented in at least 800,000 years. Carbon dioxide have been higher than historical experience. It is extremely likely(95% confident) that human influence has been the dominant cause of the observed warming since the mid-20th century. Humanity has become a force that is causing great change dominant cause of the observed warming since the mid-20th century. Humanity has become a force that is causing great change. Many observed changes are unprecedented on timescales of decades or millennia. Climate will continue to change in the future.
