A 90 degree scan from the IMK Wind-Lidar towards the south of Chilbolton on July 13, 2005 at 15:25 UTC. The sea-breeze front is moving northward at 5 ms-1 towards the location of the Lidar. The thickness of the front nose is 900 m approx (left figure, blue colour). Above the sea breeze a northerly wind of up to 5 m s-1 is measured (red). The left figure gives the aerosol backscatter information. In front of the sea-breeze nose a step function in the cloud base level (red) is detected due to enhanced turbulence at the sea-breeze convergence (Dr Ulrich Corsmeier, IMK).

A 7 degree elevation scan from the IMK lidar on July 13, 2005 at 15:20 UTC. Negative windspeeds are directed towards the instrument. From the south the sea-breeze is propagating towards the Lidar (blue), north of the Lidar (green) and up to 1000 m south of the instrument (yellow) northerly winds prevail (Dr Ulrich Corsmeier, IMK).