On The Barometric Formulas And Their Derivation From Hydrodynamics and Thermodynamics

We derive the approximate pressure profiles, density profiles, and temperature profiles of an atmosphere, also called barometric formulas. Our variant of a derivation goes beyond the common standard exercise of a thermodynamics lecture, where commonly the discussion of the underlying physical assumptions is missed. We depart from the Navier-Stokes equation and explicitly point our attention on the physical assumptions disregarded elsewhere. We show that the usual assumptions can be relaxed leading to generalized formulas that hold even in the case of horizontal winds. This fundamental physics has some relevance to the current discussions on the climate debate.

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