Home
»
Trains Magazine
»
Forums
»
General Discussion
»
Implications of Republican sweep, part II

Edit post

Edit your reply below.

Post Body
Enter your post below.
[quote]QUOTE: For so far I have not heard the flip side reason why the greenhouse gases are increasing. I have a pretty good idea what is causing them to increase but do they say this or something else?[/quote] [url]www.radix.net/~bobg/faqs/scq.CO2rise.html[/url] From its preindustrial level of about 280 ppmv (parts per million by volume) around the year 1800, atmospheric carbon dioxide rose to 315 ppmv in 1958 and to about 358 ppmv in 1994 [Battle] [C.Keeling] [Schimel 94, p 43-44]. All the signs are that the CO2 rise is human-made: * Ice cores show that during the past 1000 years until about the year 1800, atmospheric CO2 was fairly stable at levels between 270 and 290 ppmv. The 1994 value of 358 ppmv is higher than any CO2 level observed over the past 220,000 years. In the Vostok and Byrd ice cores, CO2 does not exceed 300 ppmv. A more detailed record from peat suggests a temporary peak of ~315 ppmv about 4,700 years ago, but this needs further confirmation. [Figge, figure 3] [Schimel 94, p 44-45] [White] * The rise of atmospheric CO2 closely parallels the emissions history from fossil fuels and land use changes [Schimel 94, p 46-47]. * The rise of airborne CO2 falls short of the human-made CO2 emissions. Taken together, the ocean and the terrestrial vegetation and soils must currently be a net sink of CO2 rather than a source [Melillo, p 454] [Schimel 94, p 47, 55] [Schimel 95, p 79] [Siegenthaler].
Tags (Optional)
Tags are keywords that get attached to your post. They are used to categorize your submission and make it easier to search for. To add tags to your post type a tag into the box below and click the "Add Tag" button.
Add Tag