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Showing posts with the label acceleration

Responding to the CO2 Coalition's "Fact #12" on Sea Level Rise

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CO2 Coalition 's " Fact #12 " asserts that global sea levels rose before CO2 levels started to increase. They say, "The evidence shows that the global warming causing the rise in sea levels and the retreat of the glaciers began long before any significant man-made CO2 increases could have influenced either. ... That glacial 'tipping point' occurred around 1800, with full-on retreat by 1850. Thus began more than 150 years of worldwide glacial retreat and sea-level rise that continues at about the same rate today as 150 years ago." They cite Jevrejeva et al 2014[1] in support of this, and they produced their own version of a graph supposedly taken from that paper, complete with a picture of a rock hammer. Why not? So of course I tracked own Jevrejeva et al 2014 to see if their claims are backed up by the paper they chose to use to support them. Here's the graph from the paper below. As you can see, the paper goes back to 1700, and the 1-sigma confidenc...

Responding to the CO2 Coalition's "Fact #5" on Acceleration of CO2 Emissions

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The CO2 Coalition 's Fact #5 is titled, "CO2 emissions began accelerating in the mid-20th century." This one doesn't even get its title superficially correct. The explanation that goes with this is rather short, so I'll share it all. "Global man-made CO2 emissions began accelerating in the post-World War II economic boom and continue increasing today. If CO2 is the primary factor driving a warming planet, we should see indications of an acceleration of warming beginning in that period and continuing today." The graph associated with this "fact" is below. There are at least two obvious problems with this. First, you can detect acceleration in emissions by an upward curve - that indicates that emission rates are increasing. Clearly this curve is present in the late 19th century, then flattens early 20th century and increases again in the 1930s or so. But second, and more importantly, the CO2 Coalition  did not show any emissions from land use c...