THE LEVEL IN THE TROPOSPHERE
WITH THE GREATEST HEIGHT FALLS
 
METEOROLOGIST JEFF HABY
Imagine taking a 1 foot tall column of clay and compressing it to a 9 inch column of clay. Originally, half
the distance from the top to the bottom of the clay was 6 inches. After compression, half the distance becomes
4.5 inches. Therefore, the height fall was 1.5 inches at one half the height. Now how about a third of the way
up the column? Originally, a third of the way up the column is 4 inches. After compression, a third of the way
up the column becomes 3 inches. Therefore, the height fall was 1 inch at the onethird height. At the top of the
column, the height fell a full 3 inches. This same process occurs in the atmosphere.
Height rises or height falls
will magnify themselves with height. When a strong
low pressure trough approaches, the greatest height falls will
be in the upper troposphere.


