Search Results - "Velinov, P.I.Y."

Method for calculation of ionization profiles caused by cosmic rays in giant planet ionospheres from Jovian group by Velinov, P.I.Y, Ruder, H, Mateev, L, Buchvarova, M, Kostov, V

“…As a continuation of our studies of cosmic ray (CR) ionization in the atmospheres of the planets in the Solar system [Adv. Space Res. 27 (11) 1901, 2001a] we…”
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Ionization effect in the Earth’s atmosphere during the sequence of October–November 2003 Halloween GLE events by Mishev, A.L., Velinov, P.I.Y.

“…The effect of precipitating high-energy particles on atmospheric physics and chemistry is extensively studied over the last decade. In majority of the existing…”
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A modified Chapman function for the polar regions of oblate planet ionospheres by Velinov, P.I.Y, Kostov, V, Buchvarova, M

“…The goal of this paper is to derive expressions for the modified Chapman function Che for the north and south polar regions of an oblate planet. Formulas for…”
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Ion production and ionization effect in the atmosphere during the Bastille day GLE 59 due to high energy SEPs by Mishev, A.L., Velinov, P.I.Y.

“…•Computation of ion production rate during GLE 59 on 13 July 2000.•Time evolution of GLE particles characteristics are explicitly considered.•Estimation of…”
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Quasi-electrostatic fields in the near-earth space produced by lightning and generation of runaway electrons in ionosphere by Tonev, P.T, Velinov, P.I.Y

“…Strong quasi-electrostatic fields (QESF) are generated in the ionosphere after positive lightning discharges by a succeeding redistribution of the induced…”
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Influence of hadron and atmospheric models on computation of cosmic ray ionization in the atmosphere—Extension to heavy nuclei by Mishev, A.L., Velinov, P.I.Y.

“…In the last few years an essential progress in development of physical models for cosmic ray induced ionization in the atmosphere is achieved. The majority of…”
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Time evolution of ionization effect due to cosmic rays in terrestrial atmosphere during GLE 70 by Mishev, A.L., Velinov, P.I.Y.

“…In the last years the possible effect of solar variability on atmospheric physics and chemistry is highly debated. In most of the proposed models the role of…”
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Vertical coupling between troposphere and lower ionosphere by electric currents and fields at equatorial latitudes by Tonev, P.T., Velinov, P.I.Y.

“…Thunderstorms play significant role in the upward electrical coupling between the troposphere and lower ionosphere by quasi-static (QS) electric fields…”
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Model for induced ionization by galactic cosmic rays in the Earth atmosphere and ionosphere by Velinov, P.I.Y., Mishev, A., Mateev, L.

“…The ionization profiles produced by galactic cosmic rays in the Earth atmosphere and ionosphere are obtained on the basis of Monte Carlo simulations. Cascade…”
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Normalized ionization yield function for various nuclei obtained with full Monte Carlo simulations by Mishev, A.L., Velinov, P.I.Y.

“…Several recent results important for production of ion pairs in the Earth atmosphere by various primary cosmic ray nuclei are presented. The direct ionization…”
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Ionization effect of nuclei with solar and galactic origin in the Earth atmosphere during GLE 69 on 20 January 2005 by Mishev, A.L., Velinov, P.I.Y., Mateev, L., Tassev, Y.

“…The ground level enhancement 69 on January 20, 2005 is the second largest event in the history of cosmic ray measurements. Solar protons cause an excess of…”
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Ionization effect of solar protons in the Earth atmosphere – Case study of the 20 January 2005 SEP event by Mishev, A.L., Velinov, P.I.Y., Mateev, L., Tassev, Y.

“…The cosmic ray ground level enhancement on January 20, 2005 is among the largest recorded events in the history of cosmic ray measurements. The solar protons…”
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Empirical model of cosmic ray spectrum in energy interval 1MeV–100GeV during 11-year solar cycle by Buchvarova, M., Velinov, P.I.Y.

“…The galactic cosmic rays (GCR) are the main ionization source at altitude of a143-35km in the atmosphere. For high latitude anomalous cosmic ray (ACR)…”
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Empirical model of cosmic ray spectrum in energy interval 1 MeV–100 GeV during 11-year solar cycle by Buchvarova, M., Velinov, P.I.Y.

“…The galactic cosmic rays (GCR) are the main ionization source at altitude of ∼3–35 km in the atmosphere. For high latitude anomalous cosmic ray (ACR) component…”
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Model approximation of cosmic ray spectrum by Buchvarova, M., Velinov, P.I.Y., Buchvarov, I.

“…An analytical model which generalizes the equations describing the intensity of galactic cosmic rays (CR), including both processes, making it applicable in…”
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Analytical approach to cosmic ray ionization by nuclei with charge Z in the middle atmosphere – Distribution of galactic CR effects by Velinov, P.I.Y., Mateev, L.

“…The effects of galactic and solar cosmic rays (CR) in the middle atmosphere are considered in this work. A new analytical approach for CR ionization by protons…”
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Improved cosmic ray ionization model for the system ionosphere–atmosphere—Calculation of electron production rate profiles by Velinov, P.I.Y., Mateev, L.N.

“…The effects of galactic cosmic rays (CRs) in the middle atmosphere are considered in this work. We take into account the CR modulation by solar wind and the…”
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Electric currents from thunderstorms to the ionosphere during a solar cycle: Quasi-static modeling of the coupling mechanism by Velinov, P.I.Y., Tonev, P.T.

“…Conduction and displacement currents, and their sum the Maxwell current, generated over a thunderstorm (TS) with recurrent lightning discharges are…”
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Atmosphere–ionosphere vertical electric coupling above thunderstorms of different intensity by Tonev, P.T., Velinov, P.I.Y.

“…The most important features of the quasi-electrostatic fields (QSFs) and currents, generated in the region between a thunderstorm (TS) and the ionosphere…”
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Modeling spectra of cosmic rays influencing on the ionospheres of the earth and outer planets during solar maximum and minimum by Buchvarova, M., Velinov, P.I.Y.

“…The galactic (GCRs) and anomalous (ACRs) cosmic rays form the lower parts of the planetary ionospheres. For this purpose analytical and numerical spectra for…”
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