On the spectrum of mid-latitude sporadic-<i>E</i> irregularities
We discuss the creation of mid-latitude sporadic-<i>E</i> plasma irregularities (with length-scales smaller than sporadic layer thickness) by the neutral atmosphere turbulence. Using fluid equations, the relation between plasma density fluctuations and the velocity field of neutrals...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2000-10-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/18/1283/2000/angeo-18-1283-2000.pdf |
| Summary: | We discuss the creation of mid-latitude
sporadic-<i>E</i> plasma irregularities (with length-scales smaller than
sporadic layer thickness) by the neutral atmosphere turbulence. Using fluid
equations, the relation between plasma density fluctuations and the velocity
field of neutrals is derived. After a brief discussion of the relevant neutral
turbulence, the analytical expression for the power spectrum of plasma
irregularities is obtained. This expression allows a power-law type of
experimental irregularity spectra (the spectral index depends on sporadic-<i>E</i>
characteristics) and possible departures in detail of the irregularity spectra
from the power-law form to be explained. In addition, it allows us to make
estimates of length-scales at which such departures must occur.<br><br><b>Key words: </b>Ionosphere (ionospheric irregularities;
mid-latitude ionosphere) – Space plasma physics (turbulence)</p> |
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| ISSN: | 0992-7689 1432-0576 |