we now know that the planetary energy balance is determined by the upper levels of the troposphere and that the saturation of the absorption at the central frequency does not preclude the possibility to absorb more energy.
we now know that the planetary energy balance is determined by the upper levels of the troposphere and that the saturation of the absorption at the central frequency does not preclude the possibility to absorb more energy.
ionosphere:64
this is the main reason for absorption of hf radio waves, particularly at 10 mhz and below, with progressively less absorption at higher frequencies.