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Editorial Type:
Article
Article Type:
Research Article

A Case Study of the Jet Stream

Robert R. DicksonBuAer Project AROWA, Bldg. R48, NAS, Norfolk, Virginia

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Print Publication:
01 May 1955
DOI:
https://doi.org/10.1175/1520-0477-36.5.195
Page(s):
195–203
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Data, acquired by specially instrumented aircraft, are presented for two levels through a northwesterly jet stream. Wind shear on the cyclonic side of this jet stream is roughly twice that on the anticyclonic side. Stronger areas of clear air turbulence appear closely related to strong vertical wind shear. An area of uniform absolute vorticity exists for about 160 nautical miles north of the jet stream. Measured microvariations of the temperature along a pressure surface—up to 3.1 C° in 8.5 nautical miles—give indirect evidence of jet stream “fingers” of high velocity.

Data, acquired by specially instrumented aircraft, are presented for two levels through a northwesterly jet stream. Wind shear on the cyclonic side of this jet stream is roughly twice that on the anticyclonic side. Stronger areas of clear air turbulence appear closely related to strong vertical wind shear. An area of uniform absolute vorticity exists for about 160 nautical miles north of the jet stream. Measured microvariations of the temperature along a pressure surface—up to 3.1 C° in 8.5 nautical miles—give indirect evidence of jet stream “fingers” of high velocity.

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