text: Clouds also trap heat close to the surface, raising overnight temps especially, when cloud cover has no albedo effect because there's no sunlight to reflect. 
  
  And although clouds probably reflect diurnal solar radiation back into space, clouds are, at least in part, water vapour, and water vapour is the most abundant greenhouse gas. So if cloud formation is linked to available water vapour, you'd have to also account for the POSITIVE feedback impact of increased water vapour--which increase is directly proportional to temperatures--and you'd also have to account for the nocturnal warming effect of cloud cover.  Clouds are not simple albedo.
  
  The thing I'm reacting to is Unknown Commenter's citing ONE article in a marginal publication as evidence that 157 years of greenhouse theory is wrong. That's kind of ludicrous, and typical of the clutching at straws denier favor over sound reasoning and method. Let me know when similar findings show up in Science, Nature, or the Proceedings.