Investigations of the auroral luminosity distribution and the dynamics of discrete auroral forms in a historical retrospective

Feldstein, Y. I.; Vorobjev, V. G.; Zverev, V. L.; Förster, M.

doi:10.5194/hgss-5-81-2014

Cited by 19 publications

(14 citation statements)

References 221 publications

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“…Finally, the Pedersen and Hall conductances derived from the ISR (not using the Robinson relation) ranged at 10-25 mho and 10-40 mho, respectively. These results are consistent with previous observations and climatological studies of the energy flux, characteristic (average) energy, and conductance over the auroral zone [Wallis and Budzinski, 1981;Harel et al, 1981;Spiro et al, 1982;Hardy et al, 1987;Hecht et al, 2006;Lanchester et al, 2009;Lanchester and Gustavsson, 2012;Feldstein et al, 2014].…”

Section: Discussionsupporting

confidence: 93%

An investigation comparing ground‐based techniques that quantify auroral electron flux and conductance

et al. 2015

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We present three case studies that examine optical and radar methods for specifying precipitating auroral flux parameters and conductances. Three events were chosen corresponding to moderate nonsubstorm auroral activity with 557.7 nm intensities greater than 1kR. A technique that directly fits the electron number density from a forward electron transport model to alternating code incoherent scatter radar data is presented. A method for determining characteristic energy using neutral temperature observations is compared against estimates from the incoherent scatter radar. These techniques are focused on line‐of‐sight observations that are aligned with the local geomagnetic field. Good agreement is found between the optical and incoherent scatter radar methods for estimates of the average energy, energy flux, and conductances. The Pedersen conductance predicted by Robinson et al. (1987) is in very good agreement with estimates calculated from the incoherent scatter radar observations. However, we present an updated form of the relation by Robinson et al. (1987), ΣH/ΣP=0.57〈E〉0.53, which was found to be more consistent with the incoherent scatter radar observations. These results are limited to similar auroral configurations as in these case studies. Case studies are presented that quantify auroral electron flux parameters and conductance estimates which can be used to specify the magnitude of energy dissipated within the ionosphere resulting from magnetospheric driving.

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Section: Discussionsupporting

confidence: 93%

An investigation comparing ground‐based techniques that quantify auroral electron flux and conductance

et al. 2015

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“…lat. local time coordinate; for details see Feldstein et al (2014). This belt is called the auroral oval.…”

Section: The Auroral Ovalmentioning

confidence: 99%

Paradigm transitions in solar–terrestrial physics from 1900: my personal view

Akasofu

2015

Hist. Geo Space. Sci.

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“…The number of sunspots presented on the solar photosphere has an 11-year periodicity, approximately, and it is known as a solar activity cycle (Hoyt & Schatten, 1998;Clette et al, 2014). On the other hand, auroras (more common at high latitudes) are one of the most spectacular phenomena of nature, having always aroused a wide interest in all civilizations since many centuries ago (Brekke & Egeland, 1983;Feldstein et al, 2014;Akasofu, 2015). Unlike sunspots, observations of old auroras did not instigate obvious links with the contemporaneous solar activity and only recently such connection has been well established (Vázquez et al, 2014;.…”

Section: Introductionmentioning

confidence: 99%

Unusual rainbows as auroral candidates: Another point of view

Carrasco

Trigo

Vaquero

2017

Publications of the Astronomical Society of Japan

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Several auroral events that occurred in the past have not been catalogued as such due to fact that they were described in the historical sources with different terminology. Hayakawa et al. (2016) have reviewed historical oriental chronicles and have proposed the terms "unusual rainbow" and "white rainbow" as candidates to auroras. In this work, we present three events that took place in the 18th century in two different settings (Iberian Peninsula and in Brazil) that were originally described with similar definition/wording used by the oriental chronicles, despite the inherent differences in terms associated to oriental and Latin languages. We show that these terms are indeed applicable to the three case studies from Europe and South America. Thus, the auroral catalogues available can be extended for occidental sources with this new terminology.

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Investigations of the auroral luminosity distribution and the dynamics of discrete auroral forms in a historical retrospective

Cited by 19 publications

References 221 publications

An investigation comparing ground‐based techniques that quantify auroral electron flux and conductance

An investigation comparing ground‐based techniques that quantify auroral electron flux and conductance

Paradigm transitions in solar–terrestrial physics from 1900: my personal view

Unusual rainbows as auroral candidates: Another point of view

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