Some Effects of Turbulent Pressure

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Abstract

IN a recent paper Ertell has shown, at some length, that turbulent motion in the atmosphere reduces the pressure, recorded by a barometer, by ρw2 dynes/cm.2, where is the density of the air arid w′ is the vertical component of the turbulent velocity. This, result we can get quite simply from analogy with the kinetic theory of gases, as pointed out by McCrea.2 Ertel estimates that a mean wind-speed near the ground of 10 m./sec. would lower the local pressure by 0.08 mb.; a calculation from the observations of Scrase3 gives results of the same order.

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References

  1. 1

    Met. Zeit., 47, p. 22; 1930.

  2. 2

    M.N.R.A.S., 89, p. 721; 1929.

  3. 3

    M.O. Geophysical Memoirs, No. 52.

  4. 4

    NATURE, 115, 263; 1925.

  5. 5

    Phil. Trans. Roy. Soc., A, 223, p. 289; 1922.

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ROBERTS, O. Some Effects of Turbulent Pressure. Nature 129, 23–24 (1932) doi:10.1038/129023b0

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