Seasonal and nightly variations of gravity-wave energy density in the middle atmosphere measured by the Purple Crow Lidar
The Purple Crow Lidar (PCL) is a large power-aperture product monostatic Rayleigh-Raman-Sodium-resonance-fluorescence lidar, which has been in operation at the Delaware Observatory (42.9° N, 81.4° W, 237 m elevation) near the campus of The University of Western Ontario since 1992.Kinetic-energy Door Closing Hook density has been calculated