Atmospheric Gravity Waves and Aircraft Turbulence Encounters

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  • 1 Wave Propagation Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80303
  • | 2 Dipartimento di Elettronica, Politecnico di Torino, 10129 Turin, Italy
  • | 3 School of Geophysical Sciences, Georgia Institute of Technology, Atlanta, GA 30332
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Abstract

We describe aircraft turbulence-atmospheric gravity wave events which occurred during a 2-day period over the Continental Divide. The waves are observed by two microbarograph networks an each side of the divide and last for several hours at a time. We show them to be unstable modes of the jet stream, corresponding to propagating internal gravity waves. We also show that the position of aircraft-reported turbulence coincides with the critical levels of the waves.

Abstract

We describe aircraft turbulence-atmospheric gravity wave events which occurred during a 2-day period over the Continental Divide. The waves are observed by two microbarograph networks an each side of the divide and last for several hours at a time. We show them to be unstable modes of the jet stream, corresponding to propagating internal gravity waves. We also show that the position of aircraft-reported turbulence coincides with the critical levels of the waves.

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