¥DP-temperature to which
air must be cooled at constant pressure to
become saturated. Higher DP Þ Higher water vapor content.
¥DP is a good
indicator of
the actual water vapor content since air
pressures vary very little along the earthÕs
surface.
¥DP is plotted on surface weather maps.
¥DP depression (Temp-DP)
is plotted aloft.