Arrangement and method for icing detection

An arrangement (121), such as one or more devices, for the detection of atmospheric icing conditions comprising

• lidar (light detection and ranging) entity (108a, 108b, 108), such as a pulsed lidar, configured to emit electromagnetic radiation, optionally in a number of directions, to the atmosphere and to receive radiation backscattered from the aerosol, such as a cloud, present in the atmosphere, and
• a data processing entity (122) configured to obtain (126) at least one indication of signal intensity, such as the CNR (carrier-to-noise ratio) or other indicative parameter, on the basis of the received backscattered signal relative to a number of distances such as heights from a predetermined basic level such as the location of the lidar,
• further configured to compare (128) said at least one indication of signal intensity with at least one predetermined reference in order to obtain an indication of the likelihood of cloud presence at said number of distances, and
• configured to determine an indication of the icing potential (130) at said number of distances on the basis of the comparison and an indication of the temperature at said number of distances.