Ionization effect of nuclei with solar and galactic origin in the Earth atmosphere during GLE 69 on 20 January 2005

Mishev, Alexander; Velinov, P.; Mateev, L. N.; Tassev, Yordan

doi:10.1016/j.jastp.2012.06.012

Cited by 23 publications

(22 citation statements)

References 41 publications

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“…Atmospheric ionization and radiation dosage from this specific event have been studied by Mishev et al [, ] and at higher altitudes by von Savigny et al [], using space‐based CR spectral data and a different simulation method for various geographical locations. The present analysis is complementary to previous studies because it is based on detailed temporal measurements from NMs at specific locations, to precisely specify the time evolution of atmospheric ionization and radiation dosage as a function of altitude.…”

Section: Methodsmentioning

confidence: 99%

Modeling polar region atmospheric ionization induced by the giant solar storm on 20 January 2005

et al. 2017

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Ionization in Earth's troposphere is mainly due to Galactic cosmic rays. Occasionally, solar storms produce intense relativistic ion beams that significantly increase such ionization. One of the largest recorded solar radiation storms, on 20 January 2005, resulted in up to 55‐fold increases in the count rates of ground‐based particle detectors in polar regions. We use McMurdo and Inuvik neutron monitor data to estimate accurate time profiles of ion energy spectra above the atmosphere at each location. Using data‐driven atmospheric models, we perform Monte Carlo simulations of particle‐air interactions and calculate atmospheric ionization and potential biological dosage versus altitude and time for each location. We found that if airplane passengers had traversed the south polar region, they could have been exposed to the typical annual cosmic radiation dosage at sea level within 1 h. These techniques can help evaluate possible influences of solar activity on atmospheric properties.

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Section: Methodsmentioning

confidence: 99%

Modeling polar region atmospheric ionization induced by the giant solar storm on 20 January 2005

et al. 2017

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“…GCR and SEP particles with energy spectra described in section 2.2 are simulated to interact with the modeled atmosphere, assuming that particle spatial distributions are isotropic above relatively small locations near the McMurdo and Inuvik NM stations. In one-minute time steps from 6:50-8:00 UT, the energy deposited in each atmospheric layer is recorded and converted into an ionization rate using the average ionization potential of air of 35 eV [9].…”

Section: Monte Carlo Simulations Of Atmospheric Ionizationmentioning

confidence: 99%

“…Fortunately such high increases occurred only at or near Antarctica, with no commercial air travel; this event highlights the potential effects on polar air flights if such increases occur over the North polar region in the future. With such a large increase in particle fluxes, this event provides a good example case for estimating atmospheric ionization [9]. Here we make direct use of accurate measurements by NMs at different locations, combined with detailed Monte Carlo simulations based on the estimated atmospheric structure at those locations and times, to estimate atmospheric ionization due to relativistic solar particles as a function of altitude and time.…”

Section: Introductionmentioning

confidence: 99%

Simulations of Polar-Region Atmospheric Ionization Induced by the Ground Level Enhancement of January 20, 2005

Mitthumsiri¹,

Seripienlert²,

Ruffolo³

et al. 2016

Proceedings of the 34th International Cosmic Ray Conference — PoS(ICRC2015)

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“…In some cases the energy of SEPs is high enough (about a 1 GeV/nucleon) to initiate an atmospheric cascade leading to an enhancement of count rate of ground‐based neutron monitors. This special class of SEP events, called ground level enhancements, significantly increases the ion production in the atmosphere, specifically in polar regions [ Damiani et al , ; Jackman et al , ; Calisto et al , ; Jackman et al , ; Usoskin et al , ; Mironova et al , ; Mishev et al , ; Mishev and Velinov , ].…”

Section: Introductionmentioning

confidence: 99%

Model CRAC:EPII for atmospheric ionization due to precipitating electrons: Yield function and applications

2016

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A new model of the family of CRAC models, CRAC:EPII (Cosmic Ray Atmospheric Cascade: Electron Precipitation Induced Ionization), is presented. The model calculates atmospheric ionization induced by precipitating electrons and uses the formalism of ionization yield functions. The CRAC:EPII model is based on a full Monte Carlo simulation of electron propagation and interaction with the air molecules. It explicitly considers various physical processes, namely, pair production, Compton scattering, generation of bremsstrahlung high‐energy photons, photoionization, annihilation of positrons, and multiple scattering. The simulations were performed using GEANT 4 simulation tool PLANETOCOSMICS with NRLMSISE 00 atmospheric model. The CRAC:EPII model is applicable to the entire atmosphere. The results from the simulations are given as look‐up table representing the ionization yield function. The table allows one to compute ionization due to precipitating electrons for a given altitude and location considering a given electron spectrum. Application of the model for computation of ion production during electron precipitation events using spectra from balloon‐borne measurements is presented.

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Ionization effect of nuclei with solar and galactic origin in the Earth atmosphere during GLE 69 on 20 January 2005

Cited by 23 publications

References 41 publications

Modeling polar region atmospheric ionization induced by the giant solar storm on 20 January 2005

Modeling polar region atmospheric ionization induced by the giant solar storm on 20 January 2005

Simulations of Polar-Region Atmospheric Ionization Induced by the Ground Level Enhancement of January 20, 2005

Model CRAC:EPII for atmospheric ionization due to precipitating electrons: Yield function and applications

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