Papers by Hripsime Mkrtchyan
Europhysics News
The Young Minds (YM) programme of the European Physical Society (EPS) was initiated 10 years ago,... more The Young Minds (YM) programme of the European Physical Society (EPS) was initiated 10 years ago, with the goal to connect young students and researchers all over Europe and to support their professional and personal growth.
Despite the ubiquity of thunderstorms, lightning, and related electrical phenomena, many importan... more Despite the ubiquity of thunderstorms, lightning, and related electrical phenomena, many important
electromagnetic processes in our atmosphere are poorly understood; the key questions about the thundercloud
electrification and lightning initiation remain unanswered. The bulk information on particle fluxes
correlated with thunderstorm can be used to better understand the electrical structure of thunderclouds.
Only very specific electric configuration of the lower part of the cloud can support the sustainable
acceleration of the electrons. Our analysis is based on the thunderstorm data from the Aragats Mountain
in Armenia, 3200 m above sea level Varieties of particle detectors located at Aragats Space
Environmental Center are registering neutral and charged particle fluxes correlated with thunderstorms,
so-called Thunderstorm Ground Enhancements (TGEs). Simultaneously the electrical mills and lightning
detectors are monitoring the near-surface electric field and type of lightning occurrences; weather
stations are measuring plenty of meteorological parameters. In the present paper we relate particle
fluxes to the electrical structure of thunderclouds, namely, to the origination of the Lower Positive
Charged Region (LPCR) below the main negative charged layer in the middle of the thundercloud, and
to lightning occurrences. Only after creation of the lower dipole in the thundercloud can the electrons be
accelerated and particle flux be directed downward. Maturity of the LPCR is correlated with increasing
particle fluxes. Thus, the temporal evolution of TGE gives direct evidence of the maturity of LPCR, its
initiation, and its decaying.
Journal of Physics: Conference Series, 2013
ABSTRACT We discuss role of the LPCR model in the initiation of intracloud and cloud-to-ground li... more ABSTRACT We discuss role of the LPCR model in the initiation of intracloud and cloud-to-ground lightning as well as in accelerated electrons in positive field within the cloud. Our analysis is based on the thunderstorm data from the Aragats Mountain in Armenia, 3200 m a.s.l. The electrical mill and lightning detectors are monitoring the near surface electrical field, distance and type of lightning occurrences, particle detectors register fluxes of neutral and charged particles associated with thunderstorms. The relations of particle fluxes to electrical structure of thunderclouds and - to lightning occurrences of different types were established and discussed. Our analysis supports the transient character of emerging LPCR and confirms blocking of CG- lightning occurrences by the mature LPCR. High particle fluxes, associated with thunderstorms, so called Thunderstorm ground enhancements (TGEs) prove the existence of the LCPR and its transient character.
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Papers by Hripsime Mkrtchyan
electromagnetic processes in our atmosphere are poorly understood; the key questions about the thundercloud
electrification and lightning initiation remain unanswered. The bulk information on particle fluxes
correlated with thunderstorm can be used to better understand the electrical structure of thunderclouds.
Only very specific electric configuration of the lower part of the cloud can support the sustainable
acceleration of the electrons. Our analysis is based on the thunderstorm data from the Aragats Mountain
in Armenia, 3200 m above sea level Varieties of particle detectors located at Aragats Space
Environmental Center are registering neutral and charged particle fluxes correlated with thunderstorms,
so-called Thunderstorm Ground Enhancements (TGEs). Simultaneously the electrical mills and lightning
detectors are monitoring the near-surface electric field and type of lightning occurrences; weather
stations are measuring plenty of meteorological parameters. In the present paper we relate particle
fluxes to the electrical structure of thunderclouds, namely, to the origination of the Lower Positive
Charged Region (LPCR) below the main negative charged layer in the middle of the thundercloud, and
to lightning occurrences. Only after creation of the lower dipole in the thundercloud can the electrons be
accelerated and particle flux be directed downward. Maturity of the LPCR is correlated with increasing
particle fluxes. Thus, the temporal evolution of TGE gives direct evidence of the maturity of LPCR, its
initiation, and its decaying.
electromagnetic processes in our atmosphere are poorly understood; the key questions about the thundercloud
electrification and lightning initiation remain unanswered. The bulk information on particle fluxes
correlated with thunderstorm can be used to better understand the electrical structure of thunderclouds.
Only very specific electric configuration of the lower part of the cloud can support the sustainable
acceleration of the electrons. Our analysis is based on the thunderstorm data from the Aragats Mountain
in Armenia, 3200 m above sea level Varieties of particle detectors located at Aragats Space
Environmental Center are registering neutral and charged particle fluxes correlated with thunderstorms,
so-called Thunderstorm Ground Enhancements (TGEs). Simultaneously the electrical mills and lightning
detectors are monitoring the near-surface electric field and type of lightning occurrences; weather
stations are measuring plenty of meteorological parameters. In the present paper we relate particle
fluxes to the electrical structure of thunderclouds, namely, to the origination of the Lower Positive
Charged Region (LPCR) below the main negative charged layer in the middle of the thundercloud, and
to lightning occurrences. Only after creation of the lower dipole in the thundercloud can the electrons be
accelerated and particle flux be directed downward. Maturity of the LPCR is correlated with increasing
particle fluxes. Thus, the temporal evolution of TGE gives direct evidence of the maturity of LPCR, its
initiation, and its decaying.