OBSERVATIONS OF STRATOSPHERIC CLEAR-AIR TURBULENCE AND MOUNTAIN WAVES OVER THE SIERRA NEVADA MOUNTAINS: AN ANALYSIS OF THE U-2 FLIGHTS OF 13-14 MAY, 1964

Abstract

Data obtained from a specially-instrumented U-2 aircraft have been used to relate clear-air turbulence with mountain wave structure, observed during two research flights in the stratosphere over the Sierra Nevada Mountains on 13 and 14 May, 1964. The several cases of severe turbulence encountered took place in regions immediately downstream of wave troughs, in area of decreased statis stability and slower wind speeds associated with the prevailing upwind tilt of the waves. An expression for the Richardson number is obtained which incorporates modifications imposed upon flow through stationary disturbances such as mountain waves.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1967
Accession Number
AD0667222

Entities

People

  • Roger A. Helvey

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Accelerometers
  • Air Force
  • Aircrafts
  • Altitude
  • California
  • Cameras
  • Clear Air Turbulence
  • Climate Change
  • High Altitude
  • Meteorology
  • Mountains
  • Radar Altimeters
  • Richardson Number
  • Stratosphere
  • Turbulence
  • United States
  • Wind Direction

Readers

  • Atmospheric Remote Sensing.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Geotechnical Engineering.

Technology Areas

  • Space