Meteorology: Upper Level Low Pressure, What is it?

Subject: Meteorology: Upper Level Low Pressure, What is it?

Date: Thu Apr 24 13:16:20 1997
Posted by Kevin Powers
Email: KEV295@aol.com
Grade level: undergrad
School: n/a
City: Spring State/Province: Texas
Country: USA
Area of science: Earth Sciences
ID: 861905780.Es

Message:

How can there be low pressure in the upper levels of the atmosphere and not at the surface? Wouldn't the relatively higher pressure near the surface "equalize" or "fill in" upward to the above low pressure?