It's not very surprising. They are dealing with an incomplete knowledge of a very complex system, and getting surprises as more knowledge and real world metrics

It's not very surprising. They are dealing with an incomplete knowledge of a very complex system, and getting surprises as more knowledge and real world metrics challenge previous assumptions. Probably it was a surprise that the biggest temperature anomalies happens near the Arctic, with all that permafrost waiting for thaw, that is not something happening evenly all over the globe. And by now is not just us that worsen the problem now, we already achieved some tipping points and triggered and empowered some positive feedback loops. Reaching net zero (or worse, what was defined as net zero in COP26) is not enough, not even if magically it is achieved now. We may keep adding pressure to a not so well understood complex system on which we all depend on or try to lower or if possible revert the pressure. So far we are betting really everything that the system will be able to stand much more pressure, and if it blow up, we will be able to fix or mitigate the damage. Maybe we deserve the outcome of that policy.