Piehole. Salby is a fraud and a fool. Do a search on him. He has zero respect among true scientists. His diffusion theory is total bullshit. He is not an ice expert. He is a joke. What is wrong with reliable sources like the hundreds of ice scientists who have studied this issue up down and sideways?
To read some the real science about ice CO2 measurements and a total takedown of Salby's stupidity read here...
http://www.climatescience.cam.ac.uk/community/file/download/843
Here's just a taste.
Diffusion of gases does occur in ice
but (apart from the very small molecule, helium), it is of order centimetres even over
800,000 years. This can be seen most clearly for methane for which the very sharp jumps
that occur at the start of DansgaardâOeschger events (typically 40% jumps in <50 years) are
preserved at similar amplitude over 800,000 years.
There is no problem with the ice record of CO2. It is NOT a proxy
This chart is one data set and "diffusion" is certainly not an issue. Average max ppm for CO2 is around 280 until exactly when man started burning fossil fuels when within one hundred years the levels have gone up 40% . Current levels are 400 ppm.
To suggest this is natural, as you did, is beyond stupid.
To rely on simply denying facts is the pathetic last gasp of someone who doesn't have a leg to stand on.
You are exactly like the kind of denier propagandist employed by conservative think tanks.
Basically, I have to call it like I see it. You, just like jerm, are a fucking liar.
