Sensitivity of the sporadic-E irregularity spectrum to the ion composition of the layer

Details Sensitivity of the sporadic-E irregularity spectrum to the ion composition of the layer Sensitivity of the sporadic-E irregularity spectrum to the ion composition of the layer

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000kfnts...3..501k&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, Suppl, no. 3, p. 501-503

Computer Science

Scientific paper

Plasma density irregularities in sporadic-E layers below the turbopause level are resulted from the action of turbulence in the neutral atmosphere. A possible dependence of the spectrum of irregularities on the sporadic-E ion composition is considered in this paper. The consideration is based on an analytic expression for the irregularity spectrum. It is shown that the rms level of the relative plasma density fluctuations caused by neutral turbulence and the shape of their spectrum should be sensitive to changes in the metal ion concentration in the layer. The rms fluctuation and the slope of the irregularity spectrum increase with increasing the concentration of metallic ions in the sporadic-E. These changes in the spectrum and in the fluctuation level are explained by the reduction in the recombination rate and by the increase in the mean ion mass.

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