ATPL Theory

Altitude Temperature

Transposed Diagram – Height vs Pressure (Standard, Warm, Cold)

Transposed diagram: pressure on the horizontal axis, altitude on the vertical axis. For a chosen pressure you can see the corresponding height for standard, warm and cold columns.

Temperature offset

Pressure level

ISA (standard)
Warm column (T₀ + ΔT)
Cold column (T₀ − ΔT)

Heights at selected pressure

p level
-
h (ISA)
-
h (warm)
-
h (cold)
-
Warm column → thicker atmosphere → same pressure is found at a higher altitude.
Cold column → thinner atmosphere → same pressure at a lower altitude.