Parados,
Try again! A, B, C, N are all variables:
Let A = total amount of atmospheric forcings contributing to global warming.
Let B = amount of atmospheric forcings of other than CO2 contributing to global warming.
Let C = amount of atmospheric forcings of CO2 contributing to global warming.
Then: A = B + C
Let: N = B / C
B = N x C
A = (N x C) + C
N = (A - C) / C
N = (A / C) - 1
Solve for: N
I do not know the values of any of these variables for any year over the last 108 years.
I bet the IPCC doesn't really know the value of any of these variables for any year within the last 108 years.
If I am correct, then IPCC doesn't really know what caused AAGT (i.e., Average Annual Global Temperature) to
increase from 1898 to 1998, and
decrease from 1998 to 2008.
CAGT = Century Average Global Temperature.
Years...Anomaly... Temperature in °K
1901 to 2000...0.000...287.060
http://www.cru.uea.ac.uk/cru/data/temperature/hadcrut3gl.txt
Year.....Anomaly...Temperature in °K
1898.....-0.432......286.628
1998......0.546......287.606
2008......0.324......287.384