Download CO2 Rising: The World's Greatest Environmental Challenge by Tyler Volk PDF

By Tyler Volk

CO2 emerging is at the ROROTOKO checklist of state of the art highbrow nonfiction. Professor Volk's ebook interview ran the following as conceal function on December five, 2008.

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Extra info for CO2 Rising: The World's Greatest Environmental Challenge

Sample text

The autumn low of each year is not quite as low as the low of the year before. The yearly averages keep going up. The Mauna Loa data opened the eyes of humanity to the fact of rising CO2. As I noted earlier, today there are 42 × 1039 CO2 molecules in the atmosphere. In the early 1960s there were only 35 × 1039. That is, there are 7 × 1039 more CO2 molecules in the atmosphere now than there were in the early 1960s. We can put that number in perspective by using better units. The most convenient unit for talking about the air’s carbon dioxide concentration is parts per million (abbreviated ppm).

Mauna Loa and by 21 percent at the South Pole. Mauna Loa appears to be slowly surpassing the South Pole, as can be seen from the graph. The reason is that more CO2 is released from fossil-fuel combustion in the north than in the south. But the main conclusion is not the small diVerence in rates of growth over a half-century for the two sites; rather, it is that, generalizing from these two sites, the rise in CO2 appears to be truly global. 3 He tells how one of the most famous Earth chemists at the time was Roger Revelle.

4 Data from additional sites that have relatively long time series for CO2: Barrow, Alaska (71°N) (light line with monthly dots and large seasonal oscillations) and American Samoa (14°S) (dark line with almost no seasonal oscillations). crucial information about the subcycles of the global carbon cycle. So, in a sense, Revelle was right. The seasonal oscillations, strong at Mauna Loa but weak at the South Pole, should certainly be examined at more locations. Keeling quickly pegged the seasonal swings as coming from vegetation.

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