Saturday, July 30, 2016
Dr. Spencer, It Is Simply the Hydrostatic Condition
The Dr. Roy Spencer site has a post, "The Warm Earth: Greenhouse Effect or Atmospheric Pressure?". For what it's worth, that is the wrong way to pose the question, between those for and against the greenhouse effect. But too many "skeptics" of consensus climate science make the same mistake, even now, nearly 6 years after my 2010 "Venus: No Greenhouse Effect" post. So I want to make the point yet again, as I have over and over, that it is not the atmospheric pressure at the bottom of the atmosphere that warms the atmosphere; it is the vertical pressure DISTRIBUTION, due to the hydrostatic condition of the troposphere, that produces the vertical TEMPERATURE distribution (the negative-lapse-rate structure) which governs the global mean temperature (at any given pressure level in the atmosphere, and for a given level of incident solar radiation).
So Dr. Spencer's question should be, "The Warm Earth: Greenhouse Effect or the Hydrostatic Condition?" And the answer, as my Venus/Earth temperatures comparison definitively shows, is the latter.