chapter18

The fast disappearance kili lost 85 of its ice in the

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Unformatted text preview: t 11,000 years. The fast disappearance – Kili lost 85% of its ice in the last century - has often been attributed to recent global warming. (source: Wikipedia/NASA’s Earth Observatory) Figure 18.3 Preindustrial and recent exponential increase in atmospheric CO2 from the combined records from ice core air bubbles and from instrument measurements since 1958. The increase in atmospheric CO2 has accelerated in the last 200 years. In 2000, it was 32% above the natural baseline of 280 ppm. (source: RU) In April 2011, atmospheric CO2 at the Mauna Loa, HI station was measured at 393 ppm. Subtracting the seasonal contribution of about 2.5 ppm, this leaves 392.5ppm, 40% above the pre-industrial baseline of 280 ppm. The most recent measurements can be accessed at http://www.esrl.noaa.gov/gmd/ccgg/trends/. 
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 on 2.1 ctivities Contribute to Climate Change Compare with Natural Influences? Figure 18.x Figure 1. Atmospheric concentrations of important long-lived greenhouse gases over the FAQ 2.1, last 2000 years. Increases since about 1740 are attributed to human activities in the industrial f four principal greenera. Concentrations units are parts per million (ppm) or part per billion (ppb), indicating the ne (CH4), nitrous oxide number of molecules in a sample. (source: IPCC report) es containing fluorine, late in the atmosphere, e. Significant increases dustrial era (see Figure • Ozone is a greenhouse gas that is continually produced and human activities. destroyed in the atmosphere by chemical reactions. In the troil fuel use in transpornd the manufacture of releases CO2 and rexide is also released in plant matter. uman activities related and landfills. Methane hat occur, for example, e not currently increasates decreased over the activities such as fertill processes in soils and posphere, human activities have increased ozone through the release of gases such as carbon monoxide, hydrocarbons and nitrogen oxide, which chemically react to produce ozone. As mentioned above, halocarbons released by human activities destroy ozone in the stratosphere and have caused...
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