Latitudinal profile of UV nightglow and electron precipitations

Дмитриев, А. В.; Yeh, Hund‐Der; Panasyuk, M. I.; Галкин, В. И.; Garipov, G.; Khrenov, B. A.; Климов, П. А.; Lazutin, L. L.; Myagkova, I. N.; Свертилов, С. И.

doi:10.1016/j.pss.2011.02.010

Cited by 7 publications

(12 citation statements)

References 31 publications

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“…The energy deposition of precipitating particles of various energies mainly through the ionization of atmospheric atoms occurs at different altitudes, particularly within the D, E, and F regions of the ionosphere and extends from high to midlatitudes and over the South-Atlantic Anomaly (SAA) at low latitudes [e.g., Voss and Smith, 1980;Vampola and Gorney, 1983;Rees et al, 1988;Abel et al, 1997]. An impact of precipitating particles in the lower ionosphere (the D and E layers) and the upper atmosphere in terms of enhanced ionization and other related aeronomical effects has been investigated in a large number of studies [e.g., Buonsanto, 1999, and references therein;Nishino et al, 2002;Peter et al, 2006;Clilverd et al, 2008Clilverd et al, , 2010Turunen et al, 2009;Lam et al, 2010;Dmitriev et al, 2011], while evidence for ionospheric signatures in the topside ionosphere (F region) in the midlatitudes and over the SAA at low latitudes have also been reported [e.g., Foster et al, 1994Foster et al, , 1998Abdu et al, 2005;Kunitsyn et al, 2008aKunitsyn et al, , 2008bDmitriev and Yeh, 2008;Pedatella et al, 2009;Ngwira et al, 2012].…”

Section: Introductionmentioning

confidence: 99%

TEC evidence for near‐equatorial energy deposition by 30 keV electrons in the topside ionosphere

et al. 2013

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[1] Observations of energetic electrons (10 -300 keV) by NOAA/POES and DMSP satellites at heights <1000 km during the period from 1999 to 2010 allowed finding abnormal intense fluxes of~10 6 -10 7 cm À2 s À1 sr À1 for quasi-trapped electrons appearing within the forbidden zone of low latitudes over the African, Indo-China, and Pacific regions. Extreme fluxes appeared often in the early morning and persisted for several hours during the maximum and recovery phase of geomagnetic storms. We analyzed nine storm time events when extreme electron fluxes first appeared in the Eastern Hemisphere, then drifted further eastward toward the South-Atlantic Anomaly. Using the electron spectra, we estimated the possible ionization effect produced by quasi-trapped electrons in the topside ionosphere. The estimated ionization was found to be large enough to satisfy observed storm time increases in the ionospheric total electron content (TEC) determined for the same spatial and temporal ranges from global ionospheric maps. Additionally, extreme fluxes of quasi-trapped electrons were accompanied by the significant elevation of the low-latitude F-layer obtained from COSMIC/FORMOSAT-3 radio occultation measurements. We suggest that the storm time ExB drift of energetic electrons from the inner radiation belt is an important driver of positive ionospheric storms within low-latitude and equatorial regions.

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Section: Introductionmentioning

confidence: 99%

TEC evidence for near‐equatorial energy deposition by 30 keV electrons in the topside ionosphere

et al. 2013

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“…An analysis of the ion temperature and drift velocity in the SAA region shows that the ion enhancements are accompanied by the enhanced temperature 33 . Plasma heating leads to an increase in recombination at the heights of the F layer, and to density depletion.…”

Section: Discussionmentioning

confidence: 99%

Discovering the Low-Latitude Ionospheric Trough Associated With the Inner Radiation Belt

Karpachev

2021

Preprint

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The dynamics of ionospheric troughs during great geomagnetic storm on April 11–13, 2001 is considered. An analysis is based on measurements of electron density at altitudes of the CHAMP satellite 410–465 km. The subauroral, mid-latitude and low-latitude troughs were observed at nighttime, sometimes simultaneously. The subauroral trough is usually defined as the main ionospheric trough. The mid-latitude trough is associated with the magnetospheric ring current. It appears at the beginning of the storm recovery phase at latitudes of 40–45° GMLat (L=1.7–2.0) and exists for a long time at the late recovery phase at latitudes of the residual ring current 50–55° GMLat (L~2.4–3.0). The low-latitude trough was revealed for the first time. It is developed at the latitudes of the inner radiation belt 34–45° GMLat (L=1.45–2.00). This trough is associated with the precipitation of energetic particles from the inner radiation belt.

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“…While at high geomagnetic latitudes (L > 4) the UV emission observed can be explained by e precipitation, at low geomagnetic latitudes (L < 2.5) the UV enhancements are higher than those expected just from e precipitation -other mechanism is needed for explanation. [37] concludes that the origin of UV enhancements at middle latitudes (2 < L < 4) is still unclear and requires further studies. Simultaneous measurement of UV, energetic e and other high energy particles on Tatiana 1 and 2 satellites allowed to obtain several results important also for understanding the energetic particle dynamics in near-Earth space [39].…”

Section: Energetic Electrons and Uv Fluxmentioning

confidence: 96%

“…The analysis led to the conclusion that the mean intensity of UV radiation at high latitudes is correlated with the e fluxes (UV increases observed at higher latitudes than those of e), but it is not the case with the SAA [36]. Statistical analysis found three latitudinal regions of enhanced UV emission [37]. While at high geomagnetic latitudes (L > 4) the UV emission observed can be explained by e precipitation, at low geomagnetic latitudes (L < 2.5) the UV enhancements are higher than those expected just from e precipitation -other mechanism is needed for explanation.…”

Section: Energetic Electrons and Uv Fluxmentioning

confidence: 98%

Possibilities for selected space weather and atmospheric studies in JEM-EUSO project?

Kudela¹

2016

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

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for the JEM-EUSO CollaborationThe main scientific task of JEM-EUSO is to observe the ultra high energy cosmic rays by looking the atmosphere from space [1,2,3,4]. The detailed description of various sources of the background is important. On the other hand, the study of selected magnetospheric, ionospheric and atmospheric processes related to temporal and spatial variability of UV (ultraviolet) on the orbit where JEM-EUSO is supposed to be situated, could be a useful by-product of the main task of the project (e.g. review [5]). We attempt to summarize selected processes connected with atmospheric electricity and with energetic particles having links to the events as TLE (transient luminous event), TGF (terrestrial gamma-ray flash) and TGE (thunderstorm ground enhancement), recently observed on mountains too. Our groups (in CBK Warsaw, in IEP Košice) have a long track of experience with measurements of waves and particles for magnetospheric/ionospheric research as well as with physical analysis/interpretation of the data obtained. The JEM-EUSO, if the experiment is augmented by a very simple device that monitors energetic particles, and coordinated with other satellite measurements and with ground based observations, may be of relevance for some space weather studies related to the effects in the chain magnetosphere/ionosphere/atmosphere. This can contribute to better understanding of electromagnetic responses of lightning on the Earth and of selected processes at high altitudes in the atmosphere.

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Latitudinal profile of UV nightglow and electron precipitations

Cited by 7 publications

References 31 publications

TEC evidence for near‐equatorial energy deposition by 30 keV electrons in the topside ionosphere

TEC evidence for near‐equatorial energy deposition by 30 keV electrons in the topside ionosphere

Discovering the Low-Latitude Ionospheric Trough Associated With the Inner Radiation Belt

Possibilities for selected space weather and atmospheric studies in JEM-EUSO project?

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