Environmental Lapse Rate (ELR)
ELR is the Temp change with height that is recorded by a weather balloon
ELR is
absolutely unstable in a
thin layer just above the
ground on hot, sunny
days
Ahrens,
Meteorology Today 5th Ed.
ELR is 6.5o C/km, on average, and
thus is conditionally
unstable!
6.0o C/km
10.0o C/km
6.5o C/km