Important processes determining the flux of energy, momentum, and gas across the air-sea interface and influencing the remote-sensing signal from the ocean surface take place at small scales of millimeters to decimeters. In order to gain further insight into the basic mechanisms behind these processes, dedicated laboratory experiments are frequently conducted in the wind-wave tank of the University of Hamburg, thus yielding valuable input to the development of new air-sea interaction and remote-sensing theories. Click here to get some details about the wind-wave tank.