While the science of how CO2 and other greenhouse gases causes warming is fairly well understood, this core process only results in limited, nuisance levels of global warming. Catastrophic warming ...
While the science of how CO2 and other greenhouse gases causes warming is fairly well understood, this core process only results in limited, nuisance levels of global warming. Catastrophic warming forecasts depend on added elements, particularly the assumption that the climate is dominated by strong positive feedbacks, where the science is MUCH weaker. This video explores these issues and explains why most catastrophic warming forecasts are probably greatly exaggerated.
This is a companion video to the longer and more comprehensive climate skeptic video "What is Normal -- a Critique of Catastrophic Man-Made Global Warming Theory."
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Good news! potholer54, who's a semi-retired science journalist from Australia has produced 5 excellent YouTubes on the whole science of Global Warming, as well as many other great science vids.
Yesterday, he uploaded his latest, which I highly recommend -- already 4,884 views!
5. Climate Change -- isn't it natural? /watch?v=w5hs4KVeiAU&feature=s ub
It debunks denier's lies about periods of earth's history which had high levels of CO2, particularly the Ordovician
So, let me get this right.... CO2 isn't a problem with regards to the planet getting hotter....its just that at 500 plus ppm we'll just suffocate to death.....cool..
Nope you won't find it, because unlike the IPCC, there is no funding for criticism. Also, I have never seen anyone of the official side (IPCC and Research Institutions) doing a honest debate with real rational sceptics (and not some FOX anchors)...
If the earth's climate were dominated by positive feedbacks, then it would have run away eons ago, and we wouldn't even be here to have this discussion. It obviously hasn't. It obviously isn't.
The video states that: "Climate scientists assume that earth's climate is dominated by positive feedbacks."
Isn't it possible that positive feedbacks may occur on a more immediate timescales (decades to centuries) while still allowing the negative feedbacks to dominate over longer timescales (e.g. tens of thousands of years)?
Also, what about the possibility that sensitivity is damped by carbon sinks (e.g. oceans) that are now losing their capacity to absorb CO2?
Yes, and no, higher order immidiate feedbacks are f.e. weather effects, but the underlying lower order feedbacks push it back into its borders... It's difficult to say, because those feedbacks are even less understood than long-term feedbacks. However, on a decadal basis, it might not be so, because Sun-cycles are pre-dominant, here if we follow the recent temperature trends (which are more reliable because of satelite measurement).
Autoshare makes certain YouTube activities public on the services you choose. Select only the services you are comfortable with - like Facebook, Twitter, or Google Reader - to let your friends know what you like on YouTube. You can turn Autoshare off at any time.
potholer54, who's a semi-retired science journalist from Australia has produced 5 excellent YouTubes on the whole science of Global Warming, as well as many other great science vids.
Yesterday, he uploaded his latest, which I highly recommend -- already 4,884 views!
5. Climate Change -- isn't it natural?
/watch?v=w5hs4KVeiAU&feature=s ub
It debunks denier's lies about periods of earth's history which had high levels of CO2, particularly the Ordovician
CO2 isn't a problem with regards to the planet getting hotter....its just that at 500 plus ppm we'll just suffocate to death.....cool..
Isn't it possible that positive feedbacks may occur on a more immediate timescales (decades to centuries) while still allowing the negative feedbacks to dominate over longer timescales (e.g. tens of thousands of years)?
Also, what about the possibility that sensitivity is damped by carbon sinks (e.g. oceans) that are now losing their capacity to absorb CO2?
5/5.