Lecture 1-Nats 101
55
Pressure
Decreases Exponentially with
Height
Logarithmic Decrease
¥For
each 16 km increase in altitude, pressure drops 
by factor of 10. 48 km
- 1
mb 32 km - 10 mb 16 km - 100 mb
0 km - 1000 mb 100 mb
10 mb
1 mb
16 km
32 km
48 km
Ahrens,
Fig. 1.5