Observation and Numerical Simulation of Terrain-Induced Windshear at the Hong Kong International Airport in a Planetary Boundary Layer without Temperature Inversions

Figure 4

The GSD display at the time of terrain-induced microburst, which is given as a red ellipse. The arrows are the windshear alerts provided by LIDAR, and the brown, dotted area is the turbulence alerting area. The background yellow/green is the TDWR radar reflectivity as expressed as the intensity level of precipitation. The time displayed is in UTC. The −40 knots microburst area (solid red ellipse) just touches upon the 3-nautical-mile ARENA box (white) to the east of the south runway.