Atmospheric Diffusion in the Range 20 to 2000 Kilometers

  • F. A. Gifford
Part of the NATO · Challenges of Modern Society book series (NATS, volume 10)

Abstract

It was recently argued on theoretical grounds, by Gifford (1984), that the earth’s rotation should define the outer, or integral time-scale of atmospheric turbulent diffusion, a finding well supported by atmospheric diffusion observations over a wide range of scales (Gifford, 1977, 1983a; Barr, 1983). The consequences of this result, which have so far not been considered in dealing with diffusion at shorter ranges, become important for longer range diffusion problems, beyond about 20 km distance or an hour of diffusion time. In this paper some recent atmospheric diffusion data obtained at long ranges will be compared with earlier data. The form of diffusion in the range 20 to 2000 km, as well as the general nature of diffusion at still larger scales will be briefly discussed in relation to the time-scale of diffusion.

Keywords

Planetary Boundary Layer Diffusive Motion Relative Diffusion Atmospheric Diffusion Plume Width 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Barr, S., 1983, The random force theory applied to regional scale tropospheric diffusion, Los Alamos Nat. Lab., ESS-7 Div. MS.Google Scholar
  2. Carras, J. N., and Williams, D. J., 1981, The long-range dispersion of a plume from an isolated point source, Atmos. Environ., 15, 2205–2217.CrossRefGoogle Scholar
  3. Crabtree, J., 1982, Studies of transport and dispersion over distances of travel up to several hundred kilometers. T.D.N. No. 139, U.K. Met. 0. 14, August, 1982.Google Scholar
  4. Crawford, T. V., 1966, A computer program for calculating the atmospheric dispersion of large clouds. Univ. of Cal Lawrence Radiation Lab., UCRL-50179, 56 pp.Google Scholar
  5. Er-Al, J., and R. L. Peskin, 1981, Relative diffusion of constant-level balloons in the Southern Hemisphere. J. Atmos. Sci., 38, 2264–2274.CrossRefGoogle Scholar
  6. Gifford, F. A., 1977, Tropospheric relative diffusion observations. J. Appl. Meteor., 16, 311–313.CrossRefGoogle Scholar
  7. Gifford, F. A., 1982, Horizontal diffusion in the atmosphere: a Lagrangiandynamical theory, Atmos. Environ., 16, 505–512.CrossRefGoogle Scholar
  8. Gifford, F. A., 1983a, Atmospheric diffusion in the mesoscale range: the evidence of recent plume width measurements, Preprint volume, 6th Symp. on Turbulence and diffusion, March 22–25, Boston, Am. Meteor. Soc., pp 300–304.Google Scholar
  9. Gifford, F. A., 1983b, Discussion of Gifford (1982). Atmos. Environ., 17, 194–197.Google Scholar
  10. Hage, K. D. and H. W. Church, 1967, A computer-programmed model for calculation of fall and dispersion of particles in the atmosphere. Proc. USAEC Met. Info. Meeting, Chalk River Nuclear Labs., Sept. 11–14, 1967, pp. 320–333, AECL-2787, Atomic Energy of Canada, Ltd., vii and 619 pp.Google Scholar
  11. Krasnoff, E. and Peskin, R. L., 1971, The Langevin model for turbulent diffusion, Geophys. Fl. Dynam. 2, 123–146.CrossRefGoogle Scholar
  12. Kao, S.-K., 1962, Large-scale diffusion in a rotating fluid with applications to the atmosphere. J. Geophys. Res., 67, 2347–2359.CrossRefGoogle Scholar
  13. Kao, S.-K., 1973, Basic characteristics of global scale diffusion in the troposphere, Proc. Symp. on Turbulent Diffusion in Environmental Pollution, April 8–14, 1973, Charlottesville, Virginia, Adv. in Geophys., 18B, 15–32, 1974.Google Scholar
  14. Lin, J.-T., 1972, Relative dispersion in the enstrophy-cascading inertial range of homogeneous two-dimensional turbulence. J. Atmos. Sci., 29, 394–396.CrossRefGoogle Scholar
  15. Pasquill, F., and F. B. Smith, 1983, Atmospheric Turbulence, 3rd Ed., 437 pp, Halstead Press.Google Scholar
  16. Raynor, G. S., R. N. Dietz, and T. D’Ottavio, 1984, Aircraft measurements of tracer gas during the 1983 Cross Appalachian Tracer Experiment (CAPTEX). Preprint Volume, 4th Joint Conf. on Appl. of Air Poll. Meteor., Oct. 16–19, 1984, Portland, Oregon. Pub. by Amer. Meteor. Soc.Google Scholar
  17. Tennekes, H., 1978, The exponential Lagrangian correlation function in the inertial subrange. Atmos. Environ., 13, 1565–1567.Google Scholar
  18. Williams, D. J., 1984, Personal communication.Google Scholar

Copyright information

© Springer Science+Business Media New York 1986

Authors and Affiliations

  • F. A. Gifford
    • 1
  1. 1.Oak RidgeUSA

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