CarbonTracker is cute (though poss not as much as CarboTracker, which google suggested I might have meant. I wonder how long the explicit "What does CarbonTracker tell us? North America is a source of CO2 to the atmosphere. The natural uptake of CO2 that occurs mostly East of the Rocky Mountains removes only ~30% of the CO2 released by the use of fossil fuels" will stay so prominent.
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Of all the myriad climate skeptic arguments out there, the argument that the current rise in CO2 is not human caused truly is one of the most ridiculous positions one could take.
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Very nice maps: take a look at "carbon weather", and then the annual average maps. Looks like there's a consistent 3ppm difference between NH and SH concentrations. The global average goes up, but the difference between hemispheres remains.
So here's the question: is this difference included in the current models, or is CO2 regarded as well-mixed around the globe? Is this an additional mechanism reinforcing NH warming wrt SH, or is 3ppm not big enough to make much difference?
[CO2 is regarded as well mixed; 3ppm is not a big diff anyway -W]