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Joint science academies’ statement: Global response to climate change

The Royal Society – June 2005

This is an article (or maybe should be called a statement) from several scientific bodies proclaiming that the earth is getting warmer and it is man-made pollutants that are causing the problem.

…there is now strong evidence that significant global warming is occurring1. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)2. This warming has already led to changes in the Earth’s climate.
…human activities are now causing atmospheric concentrations of greenhouse gases – including carbon dioxide, methane, tropospheric ozone, and nitrous oxide – to rise well above pre-industrial levels. Carbon dioxide levels have increased from 280 ppm in 1750 to over 375 ppm today – higher than any previous levels that can be reliably measured (i.e. in the last 420,000 years). Increasing greenhouse gases are causing temperatures to rise; the Earth’s surface warmed by approximately 0.6 centigrade degrees over the twentieth century.

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A New Global Warming Strategy: How Environmentalists are Overlooking Vegetarianism as the Most Effective Tool Against Climate Change in Our Lifetimes

Earthsave International

This is an interesting analysis. The article basically says that we are foolish to be focusing on CO2 as a potential for the greenhouse gas effect for global warming. Rather, we should be focused on methane. While I am not sure that I totally by into the suggestion that the solution of this problem is that the human race should become vegetarians, the article does point out many good points. If this article is true, why are we spending billions of dollars to reduce CO2 emissions if it is not the true culprit?

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Carbon Cycle

Wikipedia

Wikipedia is always a good source of information on technical items needing a simple explanation. In this article we learn about the carbon cycle and its potential influences on the climate.

The cycle is usually thought of as four major reservoirs of carbon interconnected by pathways of exchange. The reservoirs are the atmosphere, the terrestrial biosphere (which usually includes freshwater systems and non-living organic material, such as soil carbon), the oceans (which includes dissolved inorganic carbon and living and non-living marine biota), and the sediments (which includes fossil fuels). The annual movements of carbon, the carbon exchanges between reservoirs, occur because of various chemical, physical, geological, and biological processes. The ocean contains the largest active pool of carbon near the surface of the Earth, but the deep ocean part of this pool does not rapidly exchange with the atmosphere.

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