Effects of the solar eclipse of March 29, 2006, in the ionosphere and atmosphere

Grigorenko, E. I.; Lyashenko, M. V.; Черногор, Л. Ф.

doi:10.1134/s0016793208030092

Cited by 42 publications

(13 citation statements)

References 6 publications

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“…[10] Figures 1a and 1b show the variation of electron density N with local time (0730 -1800 LT) at fixed height for the eclipse day (29 March 2006) and the average of 2 days before and after the eclipse day (27, 28, 30, and 31 March 2006), respectively. The percentage obscuration of the Sun is also indicated on Figure 1a.…”

Section: Resultsmentioning

confidence: 99%

“… Tomás et al [2007] from satellite measurements during the 8 April 2005 eclipse observed, among other things, an enhancement of plasma fountain around the equator, reduction in equatorial electrojet, and no effect in density nor zonal wind in the thermosphere at 370 km altitude. Grigorenko et al [2008] made use of incoherent scatter radar from a middle latitude station to study the 29 March 2006 eclipse effects. One of their observation was a decrease in the negative velocity of ionization drifts and the thermospheric wind in the height range of 290–410 km.…”

Section: Introductionmentioning

confidence: 99%

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Analysis on 29 March 2006 eclipse effect on the ionosphere over Ilorin, Nigeria

et al. 2009

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[1] Ionospheric measurements obtained during the 29 March 2006 eclipse period over Ilorin, Nigeria (longitude 4.57°E, latitude 8.53°N, dip 4.1°S), an equatorial station, are used for this study. The data are used in the determination of photoionisation rates (q) and loss coefficients at various heights. It was found that the transition height between the regions where the linear (b) and quadratic (a) loss coefficients hold is around 200 km. Some form of validations of the parameters q and a were carried out. A comparison of the results of production rates, vertical velocities and loss coefficients obtained for the F region from our study with those obtained at high solar activity for a previous eclipse at a station close to Ilorin indicates solar activity effects.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis on 29 March 2006 eclipse effect on the ionosphere over Ilorin, Nigeria

et al. 2009

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“…Solar eclipses act to produce significant variations in the parameters of the medium and geophysical fields in the Earth‐atmosphere‐ionosphere‐magnetosphere system (e.g., Chernogor, ; Chernogor & Rozumenko, ). Eclipses cause the ground and the air to cool, the air pressure and the ionospheric electron density to decrease, the electron and ion temperature to reduce, and other processes to occur (see, e.g., Afraimovich et al, ; Akimov et al, ; Burmaka & Chernogor, ; Chernogor, , , , , , ; Chernogor & Garmash, ; Domnin et al, ; Grigorenko et al, ; Le et al, ; Salah et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…Radio Science Rozumenko, 2008). Eclipses cause the ground and the air to cool, the air pressure and the ionospheric electron density to decrease, the electron and ion temperature to reduce, and other processes to occur (see, e.g., Afraimovich et al, 2002;Akimov et al, 2005;Burmaka & Chernogor, 2013;Chernogor, , 2010aChernogor, , 2010bChernogor, , 2011aChernogor, , 2012aChernogor, , 2012bChernogor & Garmash, 2017;Domnin et al, 2013;Grigorenko et al, 2008;Le et al, 2008;Salah et al, 1986).…”

Section: 1029/2019rs006866mentioning

confidence: 99%

Radio Monitoring of Dynamic Processes in the Ionosphere Over China During the Partial Solar Eclipse of 11 August 2018

et al. 2020

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We briefly describe the multifrequency multiple‐path radio system and illustrate its observational capabilities by performing, as an example, the study of dynamic processes that occurred in the ionosphere over China during the partial solar eclipse on August 11 2018. This system, based on the software‐defined radio technology and capable of operating in the 10‐kHz to 30‐MHz band, has been developed jointly by Harbin Engineering University, the People's Republic of China, where it is located, and V. N. Karazin National University, Ukraine. The principle of the system operation is based on measurements of a Doppler shift of frequency. The implementation of Marple's algorithm for autoregression spectrum analysis has permitted an increase in a Doppler resolution down to 0.02 Hz and in a temporal resolution down to 7.5 s. The number of radio propagation paths and their orientation depend on the specifics of problems being solved. The interpretation of the eclipse effects is complicated by processes launched by the dusk terminator. The eclipse was associated with an increase in the number of rays, the generation of oscillation processes in the atmospheric gravity wave range of periods, and with a negative Doppler shift of frequency at first and a positive shift of smaller magnitude subsequently. The solar eclipse launched ~9–14% amplitude quasiperiodic oscillations in the electron density, while a maximum decrease of order 26% was observed over the Hailar–Harbin path in the ionospheric E region. The latter value does not virtually differ from theoretical estimates.

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“…neutral wind, thermospheric composition, diffusion process) that explain the distribution of plasma at the different ionospheric layers are well established. However, these mechanisms do compete with themselves in explaining the ionosphere, especially the topside ionosphere (see Gulyaeva, 2011).…”

Section: Introductionmentioning

confidence: 99%

Solar-eclipse-induced perturbations at mid-latitude during the 21 August 2017 event

et al. 2019

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A study of the response of some ionospheric parameters and their relationship in describing the behaviour of ionospheric mechanisms during the solar eclipse of 21 August 2017 is presented. Mid-latitude stations located along the eclipse path and with data available from the Global Ionospheric radio Observatory (GIRO) database were selected. The percentage of obscuration at these stations ranges between 63 % and 100 %. A decrease in electron density during the eclipse is attributed to a reduction in solar radiation and natural gas heating. The maximum magnitude of the eclipse consistently coincided with a hmF2 increase and with a lagged maximum decrease in NmF2 at the stations investigated. The results revealed that the horizontal neutral wind flow is as a consequence of the changes in the thermospheric and diffusion processes. The unusual increase and decrease in the shape and thickness parameters during the eclipse period relative to the control days points to the perturbation caused by the solar eclipse. The relationships of the bottomside ionosphere and the F2 layer parameters with respect to the scale height are shown in the present work as viable parameters for probing the topside ionosphere during the eclipse. Furthermore, this study shows that in addition to traditional ways of analysing the thermospheric composition and neutral wind flow, proper relation of standardized NmF2 and hmF2 can be conveniently used to describe the mechanisms.

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Effects of the solar eclipse of March 29, 2006, in the ionosphere and atmosphere

Cited by 42 publications

References 6 publications

Analysis on 29 March 2006 eclipse effect on the ionosphere over Ilorin, Nigeria

Analysis on 29 March 2006 eclipse effect on the ionosphere over Ilorin, Nigeria

Radio Monitoring of Dynamic Processes in the Ionosphere Over China During the Partial Solar Eclipse of 11 August 2018

Solar-eclipse-induced perturbations at mid-latitude during the 21 August 2017 event

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