Air Traffic Control Ground Effect Threshold 
Pilot Institute
MARCH 28, 2025
Vortex size is also affected by proximity to the ground. If youre flying low enough to be in ground effect, the vortex isnt able to fully develop. They wont directly change the intensity of the vortex, but theyll help dissipate trailing vortices much quicker than still air. This phenomenon is called Ground Effect.
Photographic Logbook
JANUARY 25, 2025
Rolling out on final approach, I was surprised to see another airplane stopped right at the runway threshold. Usually, Alton Bay volunteers hold departure traffic significantly farther back from the threshold when other aircraft are about to land. Should that guy be so close to the threshold?" Joe asked.
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