Steve Milloy at Junkscience.com posted this yesterday, and even though it is a few months old, it’s too funny to pass up. It is so ridiculous that it reminds me of Al Gore’s famous claim that the Earth’s mantle is “millions of degrees” on national television.
Even the worst case scenario computer models pushed by IPCC don’t come close to this, and they only go out to to the year 2100, because the uncertainty beyond that is so great.
The Grist writer who made the ridiculous statement, David Roberts, is famous for regularly making wacky claims, such as his suggestion that climate skeptics should undergo Nuremberg style war crime trials.
My question is: How does somebody who makes claims like that get cleared for a TED talk? Watch the video and note all the emotional video and image insertions to go with his rhetoric, then note the graphs.
Nuremberg-Trials-for-Skeptics-Guy says Earth’s surface temp may reach 180-degrees F by 2300 without emissions curbs
But the Earth only re-radiates so much radiation for CO2 to absorb and there’s already a surfeit of CO2 in the atmosphere.
The clip starts at about 10:15 into the video.
Note: watch until 11:08, where he makes the 180F claim. – Anthony
Gotta love the FOR THE REST OF YOUR LIFE at the end with the music.
Assuming somehow Earth could get the extra energy from the sun needed to sustain such an increase, and assuming somehow CO2 manages to overcome its limits related to LWIR response in the atmosphere at band saturation, it still falls short if we take the worst case IPCC model path at project into the future to 2300.
Depending on who you ask, the average surface temperature of the Earth now is anywhere from 57F to 61F. For the purpose of this demonstration, I’ll choose 60F. I’ve taken the IPCC worst case projection and extended the line all the way into the year 2300, getting a anomaly value of 18.6C (65.5F -32F for zero line of anomaly= 35.5F) and adding that to our current average Earth temperature of 60F, (or his comment on “places of the Earth that have an average of 80F”) it STILL comes up short.
Here’s why it can’t continue in a straight line, nearly straight up as Roberts claims.
The LWIR response of CO2 is logarithmic, not linear. We don’t get much more heating for a doubling of CO2.
…there have now been several recent papers showing much the same – numerous factors including: the increase in positive forcing (CO2 and the recent work on black carbon), decrease in estimated negative forcing (aerosols), combined with the stubborn refusal of the planet to warm as had been predicted over the last decade, all makes a high climate sensitivity increasingly untenable. A value (slightly) under 2 is certainly looking a whole lot more plausible than anything above 4.5.’ – James Annan
Wild temperature increases like the Roberts 180F by 2300 claim, and the more recent uptick hockey schtick by Joe Romm:
…look increasingly laughable.