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Pressure-temperature profiles and volume mixing ratio profiles for all pressures at 1.0×PAL O2. The black dashed lines represent the surface pressures and top-of-atmosphere (TOA) pressures. We use the modern Earth temperature-altitude profile in all cases and calculate the pressures assuming hydrostatic equilibrium. The remainder of the atmosphere is N2 for all cases. (Color graphics available online at www.liebertonline.com/ast)
