But the detailed climate models are all basically garbage and don’t add any good information beyond the naive model described above.
That’s a strange conclusion to draw. The simple climate models basically has a “radiative forcing term”; that was well estimated even in the first IPCC reports in the late 80s. The problem is that “well-estimated” means to ~50%, if I remember correctly. More complex models are primarily concerned with the problem of figuring out the second decimal place of the radiative forcing and whether it has any temperature dependence or tipping points. These are important questions! In simple terms, the question is just whether the simple model shown breaks down at some point.
I don’t think actually reading the literature should convince anyone otherwise, the worst charge you could levy is one regarding science communication. I mean, I don’t think anyone from the climate community would dispute the fact that the early IPCC reports, which were made before we had access to fancy computers, did actually predict the climate of the 21st century so far remarkably well: https://www.science.org/cms/asset/a4c343d8-e46a-4699-9afc-983fea62c745/pap.pdf
The other aspect is that the ~50% (ballpark) uncertainty in the forcing, back then, allows for good near-term projections but the projections diverge after more than a couple decades, and we really want to have a better handle on things with a longer time horizon.
Finally, you can see that sea-level projections weren’t quite as good. Detailed modelling is a bit more important there.
That’s a strange conclusion to draw. The simple climate models basically has a “radiative forcing term”; that was well estimated even in the first IPCC reports in the late 80s. The problem is that “well-estimated” means to ~50%, if I remember correctly. More complex models are primarily concerned with the problem of figuring out the second decimal place of the radiative forcing and whether it has any temperature dependence or tipping points. These are important questions! In simple terms, the question is just whether the simple model shown breaks down at some point.
I don’t think actually reading the literature should convince anyone otherwise, the worst charge you could levy is one regarding science communication. I mean, I don’t think anyone from the climate community would dispute the fact that the early IPCC reports, which were made before we had access to fancy computers, did actually predict the climate of the 21st century so far remarkably well: https://www.science.org/cms/asset/a4c343d8-e46a-4699-9afc-983fea62c745/pap.pdf
The other aspect is that the ~50% (ballpark) uncertainty in the forcing, back then, allows for good near-term projections but the projections diverge after more than a couple decades, and we really want to have a better handle on things with a longer time horizon.
Finally, you can see that sea-level projections weren’t quite as good. Detailed modelling is a bit more important there.