ESS200A
Prof. Jin-Yi Yu
Air Parcel Expands As It Rises
…
q
Air pressure decreases with elevation.
q
If a helium balloon 1 m in diameter is
released at sea level, it expands as it
floats upward because of the pressure
decrease. The balloon would be 6.7 m in
diameter as a height of 40 km.
(from
The Blue Planet
)