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Yes. But even weather forecasters and their general circulation models are constantly updated and changed. The math and the physics are the same. But the inputs change by simply looking out the damned window and seeing what the instruments are reading - and not what they were predicted to read yesterday.
I understand that GCMs are different from climate models (internal v external changing conditions) but the climate models have a problem - they aggregate uncertainty into daisy chains. If I want to model the expected foliage in the Gulf Coast in 2060, I've gotta model temperature. From that I model precipitation. And humidity. Etc. From these models I get my foliage model.
This explaims the downward estimates. A model predicting a 1.5 C temperature increase by 2010, done in 1998, should be updated with observations.
The climate models appear to generally assume greenhouse gas changes to be exponential. If that assumption is wrong, the models are kaput. Instead we may observe the past generally linear functions (assuming forcing remains the same) and get a about a 1C increase by 2100.
And other factors may be at work. The physics at work can be entirely correct. The underlying assumptions may be wrong.
A lab experiment can show me that as I add heat to my pot of water, it has increased from 45 degrees to 130 degrees (F) in 5 minutes. I check 5 minutes later and it is only 135. After 10 minutes it is 135 even though I have done nothing different and the flame is the same intensity.
So I add a lid to it. It jumps to 170 in 5 minutes and it stays 170. Hmm. I take the lid off. It's 160 after 5 minutes. (The lidded pot is how I picture the greenhouse effect).
At some point, the temperature maxes and doesn't rise. A thicker lid has little additional effect - but if I adjust the flame it sure does!
The models seems to make assumptions that the lid will lead to constant growth in water temperature. This is counterintuitive to me.
[Reply]OTOH, there is still a lot of research to be done on how climate change will affect the planet - what sort of positive/negative feedback we will see, what we can do to change it, and scientists are working on that now. It's pretty interesting work, and worth following. Screaming "THERE'S NO CONSENSUS I'M NOT LISTENING MARS HOCKEY STICK LIE LAAAA LAAA LAAA" while sticking their fingers in their ears makes the more political deniers both more ignorant and easier to ignore.
Absolutely. And stating there is consensus. I'm not listening. You're input is unhelpful (or uninteresting/boring is what I read on realclimate) makes the alarmists both more ignorant and easier to take shots at.
My wife is hotter than your wife.
Burning fossil fuels results in a net increase in atmospheric CO2 - fact
The human race is burning shit loads of fossil fuels - fact
The concentration of CO2 in the atmosphere is increasing - fact
Is the conclusion not blindingly obvious?
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