No model is perfect, true, but once Arctic sea ice goes, which it will before 2030, possibly sooner, then there will be a quantum jump in temperature in the Arctic, followed by methane clathrate release, and then global temperatures will spike rapidly. The linear model is wrong, because there are so many buffers built into the system. For instance, a lot of heat - 90% - ends up in the ocean, therefore testing weather balloons is not going to tell you much, because that's not where the heat energy is hanging out.
Once you exceed those natural buffers built into the system that make things seem like not much is going on, things will start to change very quickly.
Once you exceed those natural buffers built into the system that make things seem like not much is going on, things will start to change very quickly.
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