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| From:  tc101 (Original Message) | Sent: 1/7/2009 5:47 AM |
WSJ January 4, 2009
Harold Ambler, the owner of TalkingAboutTheWeather.com, writing at HuffingtonPost.com:
[T]he theory that carbon dioxide "drives" climate in any meaningful way is simply wrong. . . . Carbon dioxide cannot absorb an unlimited amount of infrared radiation. Why not? Because it only absorbs heat along limited bandwidths, and is already absorbing just about everything it can. That is why plotted on a graph, C02's ability to capture heat follows a logarithmic curve. We are already very near the maximum absorption level. Further, the IPCC Fourth Assessment, like
all the ones before it, is based on computer models that presume a positive feedback of atmospheric warming via increased water vapor. . . . This mechanism has never been shown to exist. Indeed, increased temperature leads to increased evaporation of the oceans, which leads to increased cloud cover (one cooling effect) and increased
precipitation (a bigger cooling effect). Within certain bounds, in other words, the ocean-atmosphere system has a very effective self-regulating tendency. By the way, water vapor is far more prevalent, and relevant, in the atmosphere than carbon dioxide -- a trace gas. Water vapor's absorption spectrum also overlays that of carbon dioxide. They cannot both absorb the same energy! The relative might of water vapor and relative weakness of carbon dioxide is
exemplified by the extraordinary cooling experienced each night in desert regions, where water in the atmosphere is nearly non-existent.
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