25 de julho de 2009

E a evidência científica vai-se acumulando... agora, são as nuvens...

"The best evidence is that the climate is now being driven by amplifying feedbacks (see Study: Water-vapor feedback is “strong and positive,” so we face “warming of several degrees Celsius”), most notably:
  • The defrosting of the permafrost
  • The drying of the Northern peatlands (bogs, moors, and mires).
  • The destruction of the tropical wetlands
  • Decelerating growth in tropical forest trees — thanks to accelerating carbon dioxide
  • Wildfires and Climate-Driven forest destruction by pests
  • The desertification-global warming feedback
  • The saturation of the ocean carbon sink


In spite of all evidence to the contrary, the deniers/delayers/inactivists, led by MIT’s Richard Lindzen, have argued that negative feedbacks dominate the climate system. In particular, they have asserted that clouds are a negative feedback. A major new study in Science from “Observational and Model Evidence for Positive Low-Level Cloud Feedback” (subs. req’d) is thus a potentially huge — and worrisome — piece of research."

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