Nonlocal theory of long-wavelength plasma waves associated with sporadic E layers

Details Nonlocal theory of long-wavelength plasma waves associated with sporadic E layers Nonlocal theory of long-wavelength plasma waves associated with sporadic E layers

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.1495r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Feb. 1, 1989, p. 1495-1500. Research supported by DOE.

Physics

6

Plasma Waves, Space Plasmas, Sporadic E Layer, Ionospheric Electron Density, Kilometric Waves

Scientific paper

The theory of E region gradient drift plasma waves is extended to cases where the gradient scale length is nonuniform. The nonlocal theory is applied to kilometer-scale plasma waves observed at midlatitudes in conjunction with sporadic E layers. It is found that the nonlocal growth rate spectrum at long wavelengths is roughly proportional to the irregularity wave number, as opposed to the dependence of the square of the irregularity wave number predicted by conventional local theory at long wavelengths. The nonlocal growth rate at short wavelengths determined with a slab model of the sporadic E layer was unbounded, suggesting that the slab model is inadequate.

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