We had 1.05 degrees of warming so far comparing past year to 1880-1900.
CO2 has risen from 280 to 412, more than a factor of root 2.
We had 24 documented solar cycles. 4 of the last 7 were in the top 5 most active ones.
We had 1 VEI6 volcanic eruption in the past 85 years. The prior 130 years saw 5 VEI6's and 1 VEI7
Still the IPCC makes the following claims: natural forcings in the climate models have not contributed to warming at all.
Warming due to CO2 doubling can be as high as 4.5.
Rising with root 2 should thus have caused up to 2.25 degrees warming. Rising with as much as we have should have caused up to 2.4 degrees warming.
However it has not. It looks like the warming per doubling is only 1.5 accounting for at least some natural forcings.
So we can go as high as 825 ppm and warming wouldn't go over 2.5 degrees if that's true.
Why the fuss?
https://data.giss.nasa.gov/gistemp/tabledata_v3/GLB.Ts+dSST.txt
CO2 has risen from 280 to 412, more than a factor of root 2.
We had 24 documented solar cycles. 4 of the last 7 were in the top 5 most active ones.
We had 1 VEI6 volcanic eruption in the past 85 years. The prior 130 years saw 5 VEI6's and 1 VEI7
Still the IPCC makes the following claims: natural forcings in the climate models have not contributed to warming at all.
Warming due to CO2 doubling can be as high as 4.5.
Rising with root 2 should thus have caused up to 2.25 degrees warming. Rising with as much as we have should have caused up to 2.4 degrees warming.
However it has not. It looks like the warming per doubling is only 1.5 accounting for at least some natural forcings.
So we can go as high as 825 ppm and warming wouldn't go over 2.5 degrees if that's true.
Why the fuss?
https://data.giss.nasa.gov/gistemp/tabledata_v3/GLB.Ts+dSST.txt
