There is an absolutely classic WUWT piece of stupidity up from Joe Bastardi (h/t QS, who has been annoying me with ZOD nonsense recently). Sometimes, it is nice to find a small simple easily understood issue which demonstrates how clueless the septics are.
And the quote is:
Nor am I going to question them as to why they believe a trace gas like CO2 (needed for life on the planet) with a specific gravity of 1.5 as compared to the atmospheres 1.0, was going to mix with air in a way to affect the earth’s temperatures
(bear in mind that isn’t all that is wrong with the article, only the stupidest).
Some of the commenters notice the problem: “Brian Macker says: January 19, 2012 at 5:24 am Joe, Are you claiming that if we measure CO2 levels at altitude that we will find lower percentages than at sea level? That’s what it sounds like.”
Bastardi’s point is stupid on a number of levels. Most obviously, if CO2 was going to separate, so would O2 and N2, and argon, and… well, lots of stuff. That doesn’t happen, and the answer is turbulent mixing. Its not a difficult answer, and you can find stuff in the AMS glossary. Or, you can just look up CO2 variation with height (e.g. Concentration variations of atmospheric CO 2 over Syowa Station …. There is a similar septic talking point as to “how can CFC’s cause the ozone hole when they are heavier than air” and the answer is the same: (a) mixing and (b) measurement.
One of the commenters even finds some data: “Alistair Ahs says: January 19, 2012 at 6:00 am Further, on your point about the mass of a CO2 molecule, when compared to N2, a quick google search shows up a research paper by Waleter Bischoff (1961), who made a number of measurements of CO2 at different heights above Scandinavia. He *did* find that on average the concentration of CO2 declined with height, but the rate of this decline is really quite modest – from the highest value of 318ppm below 200m to the lowest value of 312ppm at near to 3km. I haven’t read that, but I’d guess this is more to do with CO2 sources at ground level not being immeadiately mixed. There definitely is slight variation in CO2 around the world – but the variation isn’t important for talking about the greenhouse effect.
And then lots of other people point out to Bastardi that he has got it wrong – all of them polite and respectful, indeed one gets the impression that they find it hard to believe that “their man” has got it so hopelessly wrong.
So Joe Bastardi replies at January 19, 2012 at 9:28 am
You folks that are coming at me about co2 sg, apparently dont understand that simply put, it does not mix well with air. There was just an article about that here on WUWT.
Yes, that’s right: even when it has been carefully explained to him by his own side, he is still not capable of thinking.