On the Origin of the Air between Multiple Tropopauses at Midlatitudes

Figure 1

Vertical profiles of WV content (in parts per million by volume) relative to the pressure of the first tropopause (LRT1) shown for single (ST) and multiple tropopauses (MT) and over a range of pressures of occurrence (in hPa) of both phenomena. The part of the figure between 3.5 and 5 ppmv is enlarged in the upper right-hand corner in order to obtain a better insight of the changes in the vertical profile. The horizontal lines correspond to the second lapse-rate tropopause (colour denotes the pressure range where it happens).