credibility spectrum

Topics: Climate change, Global warming, Greenhouse gas Pages: 5 (1258 words) Published: October 19, 2013
“Credibility Spectrum: Climate Change.”
“The world is getting hotter, the sea is rising and there is increasing evidence neither is naturally occurring phenomena (CNN).” There are thousands of sources that tell us about the effects of climate change, but the debate has become endless. “Since 1950 we've seen a dramatic increase in extreme weather (CNN).” There are a variety of studies taken from the American Meteorological Society that global warming and extreme weather on earth are linked. In 2012 there were relevant events that caused controversy on this topic. For example, the heat wave in the northeastern United States, the spring wave in the east coast of the US, the winter drought in the peninsula of Europe (Spain and Portugal), and flooding caused by extreme rains in Europe.

There are many issues where climate change can be the main responsible. “Scientifics are highly confident that if the global surface temperature increases by more than 2 degrees Celsius over present temperatures we could see "a nearly ice-free Arctic Ocean in late summer (CNN)." This report shows proves that glaciers are shrinking, the ice in the Arctic is diminishing, and snow is decreasing in the North area of the planet. This factor brings negative effects to the biodiversity of the area, and can create economic losses for organizations getting profits from those areas. Some say that climate change can affect biodiversity and produce global dimming, which can affect the general global economy. Fossil fuel use and producing greenhouse gases, creates other “by products”. These so called “by products” contaminate the atmosphere because they include sulphur dioxide which also change the elements of clouds. Clouds are formed by water duplets; contaminated air results in clouds with more droplets than unpolluted clouds. Then, clouds become more reflective, and the sun’s heat and energy is reflected. Shah says, “This reduction of heat reaching the earth is known as Global Dimming (Global Issues).” Thus, some agree that global warming results from the greenhouse effect caused by overloads of polluted gases in the atmosphere caused by burning of fossil fuels. Shah states, “It would seem then, that the other by products which cause global dimming may be an ironic savior (Global Issues).” Global dimming brings human sicknesses such as respiratory problems, and environmental problems related to smog and acid rain. In addition, Anup Shah explains, “Global Dimming is hiding the true power of Global Warming (Global Issues).” Most current changes on climate predict an increment of five degrees in the temperature on the upcoming hundred years. “Addressing global dimming only will lead to massive global warming (Shah).” However, if dimming issues are only addresses, then the results of global warming will amplify. For example, in Europe there are measures to clean up and reduce pollutants without reducing the greenhouse emission in parallel. However, it seems that it may have contributed to the European reheat wave in 2003 that set fire to Portuguese forest and eliminated people in France.

Bob Gorley states, “Anthropogenic aerosols within the atmosphere will enhance the direct absorption of short wave radiation from the sun, and that further losses will occur, indirectly, from the role of aerosols in promoting cloud cover.”However, the conclusion suggests that global dimming sustains the case for restrictions while employing fossil fuels. “A reduction in solar radiation reaching the ground must be masking, to some extent, the underlying rate of increase in global temperatures. If we humans “clear up our act”, the global warming could increase at an even faster rate (Gorley).” Other sources such as Wikipedia strictly blamed on aerosols to be responsible for dimming. The simplest solution is to emit more sulfates, which would end in the troposphere. However, the use of sulfates cause acid rains.

“Key concerns are that aridification, could...

References: AAAS Board Statement on Climate Change . Web. (2006)
Brodie, Jedediah; Post, Eric; Laurance, William F
Porter, Eduardo (2013) Web. The New York Times. The Cost of Climate Change.

Shah, Anup. Global Issues. Global Dimming Web. January 15, 2005.
The Nature conservancy
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