Ionospheric equivalent slab thickness and its modeling applications

Fox, Matthew W.; Mendillo, M.; Klobuchar, J. A.

doi:10.1029/90rs02624

Cited by 42 publications

(34 citation statements)

References 19 publications

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“…A positive correlation has been detected between the monthly mean values of the slab thickness and the Ap geomagnetic index (Kersley and HajebHosseinieh, 1976), explained with the dependence of the neutral gas temperature on the level of magnetic disturbances. Fox et al (1991) argue that while a correlation with daily magnetic indices can be expected, correlation with monthly mean magnetic activity is not justified.…”

Section: Climatological Behaviourmentioning

confidence: 99%

Ionospheric slab thickness – Analysis, modelling and monitoring

Stankov

Warnant

2009

Advances in Space Research

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A review of the climatological and storm-time behaviour of the ionospheric slab thickness is presented based on long-time observations at a European mid-latitude site, Dourbes (50.1°N, 04.6°E), and on published results from other studies. An operational electron density and slab thickness monitoring system, established to provide real-time characterisation of the local ionospheric dynamics, is outlined together with some exemplary results.

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Section: Climatological Behaviourmentioning

confidence: 99%

Ionospheric slab thickness – Analysis, modelling and monitoring

Stankov

Warnant

2009

Advances in Space Research

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“…Slab thickness x includes information on both the topside and bottomside ionosphere, and indicates the shape of the electron density versus height profile; for instance, the "sharper" the peak electron density, the smaller x is. Here x is dependent on a number of ionospheric parameters such as scale height and plasma and neutral gas temperatures; hence x is usefully employed in modeling the ionosphere, such as in the intemational reference ionosphere (IRI) [Fox et al, 1991 ]. In the present paper we describe some of the only slab thickness data currently available over a wide latitude/longitude range for the southern hemisphere, which is important for modeling the southern hemisphere's ionosphere.…”

Section: •School Of Physics and Electronic Systems Engineeringmentioning

confidence: 99%

Ionospheric total electron content and slab thickness determined in Australia

Breed¹,

Goodwin²,

VANDENBERG³

et al. 1997

Radio Science

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“…This method provides the integral of the full electron density (N e ) profile-with total electron content defined as TEC = ∫ N e (h) dh. Since most of this column content comes from the F-layer, TEC is highly correlated ( ≈90%) with NmF2 ( Fox et al, 1991 ), and thus σ TEC (%) is also 20-30% ( Johansson et al, 1978 ). The overall message for both peak electron density and TEC is clear: the influence of solar irradiance is minimal in comparison to solar wind sources of downward coupling and neutral atmosphere sources of upward coupling-with the latter two being comparable.…”

Section: Earthmentioning

confidence: 99%

Comparative ionospheres: Terrestrial and giant planets

Mendillo

Trovato

Moore

et al. 2018

Icarus

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a b s t r a c tThe study of planetary ionospheres within our solar system offers a variety of settings to probe mechanisms of photo-ionization, chemical loss, and plasma transport. Ionospheres are a minor component of upper atmospheres, and thus their mix of ions observed depends on the neutral gas composition of their parent atmospheres. The same solar irradiance (x-rays and extreme-ultra-violet vs. wavelength) impinges upon each of these atmospheres, with solar flux magnitudes changed only by the inverse square of distance from the Sun. If all planets had the same neutral atmosphere-with ionospheres governed by photochemical equilibrium (production = loss)-their peak electron densities would decrease as the inverse of distance from the Sun, and any changes in solar output would exhibit coherent effects throughout the solar system.Here we examine the outer planet with the most observations of its ionosphere (Saturn) and compare its patterns of electron density with those at Earth under the same-day solar conditions. We show that, while the average magnitudes of the major layers of molecular ions at Earth and Saturn are approximately in accord with distance effects, only minor correlations exist between solar effects and day-to-day electron densities. This is in marked contrast to the strong correlations found between the ionospheres of Earth and Mars. Moreover, the variability observed for Saturn's ionosphere (maximum electron density and total electron content) is much larger than found at Earth and Mars. With solar irradiance changes far too small to cause such effects, we use model results to explore the roles of other agents. We find that water sources from Enceladus at low latitudes, and 'ring rain' at middle latitudes, contribute substantially to variability via water ion chemistry. Thermospheric winds and electrodynamics generated at auroral latitudes are suggested causes of high latitude ionospheric variability, but remain inconclusive due to the lack of relevant observations.

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Ionospheric equivalent slab thickness and its modeling applications

Cited by 42 publications

References 19 publications

Ionospheric slab thickness – Analysis, modelling and monitoring

Ionospheric slab thickness – Analysis, modelling and monitoring

Ionospheric total electron content and slab thickness determined in Australia

Comparative ionospheres: Terrestrial and giant planets

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