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<< A SUMMARY OF WEATHER FUNDAMENTALS >>
(click here for the outline
version)
Instructions: Study these
concepts until you not only KNOW them, you also
UNDERSTAND them. When you do, you'll be ready to
learn METEOROLOGY.
1. Pressure in the atmosphere varies inversely with
altitude.
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Figure 1. The average pressure of the atmosphere at sea level is approximately 1000 millibars (mb) or 14.7 lbs./in.2 Atmospheric pressure is due to the weight of the air above you. As you ascend, there is less air above you and hence lower pressure. |