Rising Motion and Surface Pressure Falls
in response to warm and cold advections
Warm and cold advection influence vertical air motion.
Warm advection results in
rising motion which leads
to falling pressures at the surface, while
cold advection leads to
causing pressures to rise at the surface.
The sequence of surface maps below show the surface pressure fields
(isobars) that resulted from the
warm and cold advection
patterns at 850 mb.
The top map shows an area of
over the northwestern United States and an area of
high pressure over the