Letter | Published:

Optical Radar Evidence for Atmospheric Dust Layers around 85 km Altitude

Naturevolume 214pages261262 (1967) | Download Citation



IN a recent letter Poultney1 has examined the evidence in favour of the existence of an atmospheric dust layer in the region about 85 km above the Earth's surface. In particular he claims that there is reliable evidence for this claim from observations using the ground based experimental method of examining the intensity of light back scattered from a vertical laser beam, or what is called laser radar. This technique is in use at several stations including Cambridge, Mass., U.S.A.2; College Park, Maryland, U.S.A.3; Kingston, Jamaica4; and Slough, England5.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Poultney, S. K., Nature, 212, 1558 (1966).

  2. 2

    Fiocco, G., and Colombo, G., J. Geophys. Res., 69, 1795 (1964).

  3. 3

    McCormick, P. D., Poultney, S. K., Van Wijk, U., Alley, C. O., Bettinger, R. T., and Perschy, J. A., Nature, 209, 798 (1966).

  4. 4

    Clemesha, B. R., Kent, G. S., and Wright, R. W., Nature, 209, 184 (1966).

  5. 5

    Bain, W. C., Sandford, M. C. W., J. Atmos. Terr. Phys., 28, 543 (1966).

  6. 6

    Clemesha, B. R., Kent, G. S., and Wright, R. W., J. Atmos. Terr. Phys., 29, 169 (1967).

  7. 7

    Bain, W. C., and Sandford, M. C. W., Nature, 210, 826 (1966).

Download references

Author information


  1. Department of Physics, University of the West Indies, Kingston, Jamaica

    • B. R. CLEMESHA
    • , G. S. KENT
    •  & R. W. H. WRIGHT


  1. Search for B. R. CLEMESHA in:

  2. Search for G. S. KENT in:

  3. Search for R. W. H. WRIGHT in:

About this article

Publication history


Issue Date




By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.