In a recent paper [Kays and Craig, 1965], we evaluated temperature advection V·∇T from the equation (1)V⋅∇T=−(ƒT/g)V2∂θ/∂zwhere V is the velocity, T the temperature, ƒ the Coriolis parameter, g the gravity field strength, V the wind speed, and θ the wind direction. Small‐scale structure, which is present in the wind field in the upper stratosphere, was eliminated by smoothing V² and θ separately. Alternatively, one can compute temperature advection from the equation (2)V⋅∇T=−(ƒT/g)(u ∂u/∂z−v ∂u/∂z)where u is the wind component toward the east and υ the wind component toward the north. In this case, u and υ can be smoothed separately.