ESS11
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
)