you'd better explain instead of repeatedly asking semirhetorical questions.
Aidan,
It can't be explained as it goes without saying !

Aidan if hide the decline was not fraud, I'm damned if I know what is.

Thanks for the heads up with current math requirement for engineering.

On the upper limit of CO2s heating ability, even the IPCC agree with me, as you appear to do. You & they have to bring in extremely hypothetical "tipping points", to get up to even a single degree. They have not a single convincing argument to support tipping points.

Just a simple look at the past, with much hotter conditions which did not actuate any mythical tipping points, but cooled each time, kinda knocks that bit of tripe out of the mix.

I agree the system is complex, much too complex for the simple GCMs, which don't even include cloud effects to be even an approximation. They are no better than those monkeys typing Shakespeare.

individual,
If it can't be explained then it's probably wrong.

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Hasbeen,
>if hide the decline was not fraud, I'm damned if I know what is.
The widespread conspiracy to convince people AGW isn't occurring is.

It's disappointing that you haven't told me the source of your figure.

I think you completely misunderstand the concept of tipping points. They're not something the predictions of 1°C warming (or more) relies upon; they're factors that could cause a lot more warming (in some cases multiple degrees) if they're reached.

What the models rely on is the amplification mechanism of the heat from the extra CO2 resulting in the atmosphere holding more water vapour, which is a much more potent greenhouse gas but quickly condenses out when it gets cold (so the amount of water vapour the atmosphere depends on the temperature rather than the amount going in).

But though they're not what the models rely on, tipping points are very important. There are at least three tipping points we have to beware of: firstly melting permafrost releasing large amounts of methane - this has happened already in a few areas, but of course the more widespread the phenomenon is, the greater the problem will be. Secondly, clathrates could decompose as the seas warm, resulting in them releasing lots of methane into the atmosphere. Thirdly a lot of atmospheric warming will inhibit the formation of oceanic stratus, thus reducing the albedo and increasing the amount of heat going into the oceans. Thankfully these last two tipping points are hard to reach - which is just as well, as the consequences would be as dire as most of the alarmist predictions.

And where did you get the idea that conditions were much hotter in the past?

Just thought I'd throw this in the conversation, as it speaks clearly for itself.
Or should I say, 31,000 scientists speak clearly in debunking the overreach of GW or CC.

https://www.youtube.com/watch?v=eiPIvH49X-E&fbclid=IwAR0WvemAbkeUSZCQouaHBk4vLkPliTwQrlaE4XXijcMfNExMo0cs7pHA72M

Watch it and weep.
As I have been saying; there is NO consensus between scientists, and we are being lied to, to subvert the truth, for what reason, I have no idea.
But the fact that they are trying so hard to hide the truth, only makes me suspicious of the whole thing and of course then, the fact that it's all a lie.
Enjoy.

If it can't be explained then it's probably wrong.
Aidan,
Incorrect assumption, it is such a basic factor of mentality that no-one's ever bothered to invent a word for things that go without saying which really is a no brainer. Alas, some people will never understand no matter what.

individual
Our language has no shortage of words for things that are common and obvious.
I think the word you're looking for is "self-evident".

And when people claim things to be self-evident it's usually because there's no evidence at all but it fits their prejudices. For instance Robert Mugabe famously claimed "It is a self-evident evil to deny a child a pure racial ancestry".

Likewise you are prejudiced against young people and/or environmentalists.

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ALTRAV,
Why post a coldlink, and why to such a boring video?
There's no doubt at all that CO2 causes warming, and we know exactly how it does.
There's also no credible alternative hypothesis to explain the observed warming