16 Comments

Well said, so well that even a denier should be able to understand. This really is a well-done overview of one form of catastrophe that could become normal in our lifetimes.

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This is a terrific description of a very dramatic weather system, pointing out how our daily existence can be impacted by climate change effects. Thank you Dr. Dessler.

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Now we have to worry about rivers in the sky, too? Climate change is really turning our world upside down... Great post, just learnt something new. Thank you.

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Excellent summary about how climate change actually works. I suspect very few of the climate deniers understand these mechanisms because they only visualize weather from their backyards and have no understanding of cause and effect.

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Good, practical information that can help everyone understand one of the interactions of climate change and weather. Thanks.

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you have very little scientific data over the last 200 years to make any claims of human induced climate change. Real science means real data over a substantial amount of time. Our Planet is 5 billion give or take years old. we have less than 100 years of reliably obtained weather data that does not contain any true evidence to support human driven climate change. Please always consider a source of information before deeming it concrete or truthful. Lots of people like to point the finger of blame at anyone they can that doesn't think, speak , or act like they do. don't get caught up in this carousel. don't be a lemming. Think for yourself and do not let THE GROUP think for you

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Thanks for this primer, we in the PNW are accustomed to atmospheric rain. They are referred to as the pineapple express mentioned here or Chinook winds....

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Great explanation, Andy. Thanks!

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I agree Ken Fabian that it is a complex issue. I do not believe that it is as simple as "If we assume a purely thermodynamic response (e.g., Clausius-Clayperon scaling), rain would increase by about 7% for every degree Celsius of warming of the atmosphere", as stated in the main text. Clausius-Clapeyron scaling explains the increase in evaporation but not necessarily the precipitation rate. The previous two answers are both plausible but I am not sure if they are sufficient to support the claim that rain would increase by 7% with every degree Celsius of atmospheric warming..

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Does more water vapour in atmosphere always mean more rain overall? Is it also possible to have the same amount or even less rain in a new equilibrium? I mean, the air has to cool down for vapour to condense and fall back. If the air does not cool down, there will be no rain.

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