Figure 5.6 A sounding is a plot of temperature and dew point in the vertical Stuve. In the Stuve thermodynamic diagram, temperature is represented on the x-axis and pressure on the y-axis. The straight lines that slope upward from right to left are the dry adiabats. The dry adiabatic lines represent a decrease in temperature of 10C for each kilometer, the dry adiabatic lapse rate. The dashed slightly curved lines represent the wet adiabats. These lines represent the moist adiabatic lapse rate experienced by a rising saturated air parcel.