As to your question about the axes.....it's sort of what one would expect from someone who feels that the school room explanation of CO2 warming you gave is needed when talking to me.
Oh ffs i know what they mean but i'm wondering if you do.
it is not that the human derived portion of CO2 is not contributing, we can all agree it is to some degree....but it is not the predominate cause.
What is then?
it is not greater than natural climate variability...as revealed by the failed climate models shown in the graph.
How does that graph say anything about natural variability?
It doesn't. The warming of the last hundred years is outside all reasonable measures of "natural variability", You could prove me wrong by showing data about natural variability that contradicts this.
The failed climate models are also failed models. So what.
Don't worry about explaining the graph to me. I'll explain it to you.
So since 1983 the temperature has risen .3 to .4 deg at the surface and in the low atmosphere compared to the ave for 1979 - 83. Of course 1979-1983 was already .15 to.2 deg above the 1960 to 1991 average, so while the models are wrong this graph hides the warming by using a baseline thats already approx .2 of a degree higher than the late 20th century baseline. that skews them and makes them look more wrong.
They people making these models reckon they will be better with new methods for accounting for ocean temps. that remains to be seen, but it is the nature of modelling things. As variables are understood the modelling becomes more accurate. It'll never be 100% accurate. No model ever is.
None the less this graph does show that the ave temp has increased by .35 to .4 deg above the mean for 1979 - 83 or .5 to .6 of a degree above the 1960 to 1990 mean. The models might be wrong but this graph shows warming, and funnily enough it shows most of it happening in the period since the significant warming was supposed to have stopped. Oh and there is nothing to suggest this warming is natural variability in the temperature record.
The models are wrong, but not in principle, just detail. In the absence of anything else that still leaves GHGs as the major cause of warming.