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Flawed forecasting : Comments
By Mark S. Lawson, published 11/6/2009Climate models have yet to demonstrate any real success in modelling known climate changes outside the past 100 years or so.
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"Warming" is not necessarily temperature related, it mostly manifests as phase changes. ie. melting ice, and system wide circulation changes. There is ample evidence that these changes are happening much faster than the conservative estimates. Global warming=Temperature increase is a nice over simplification to argue about, but it is the tip of the iceberg in reality. When all the ice has gone (!) *then* extra heat = extra temperature.
Yes, the climate science is messy and hard to understand. This is why we need years of training and super computers to get accurate daily/weekly weather reports. We now take 7 day forecast for granted and they are remarkably accurate. The same physical models can be run over and over again with many different assumptions until a "phase space" of potential futures is mapped. Up until recently the politics was such that only the "safe" forecasts have been considered. New data suggests the "safe" models are *way* too conservative. Ice sheet collapses seen in Antarctica were expected in another 20-60 years time, not last year.
The longer term forecasts are indeed subject to *much* more uncertainty and may indeed be way off but: theory tells us something must change when energy balance is altered. Theory and data show it will not happen linearly, but in a jumpy fashion. Theory and data show that we have pushed the dynamics *way* further than nature has managed for a few million years (Deccan Traps, Gulf of Mexico crater, etc)
Over-simplifying an immensely complex topic, cherry picking data and relying on ignorance is a common tactic. It is also a common assumption that science can be dumbed down for the a non-professional and still make sense.
I agree with the author on one thing though: We will have to deal with the changes as it is way too late to stop it. He is also correct that the media hypes complex topics and hence makes them seem dubious to rational, skeptical folks.
The doubters should be asking for more science, not more ignorant opinion and amateur analysis.