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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/angeo-2019-124
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2019-124
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: regular paper 18 Sep 2019

Submitted as: regular paper | 18 Sep 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

Localized TEC enhancements in the Southern Hemisphere

Ilya K. Edemskiy Ilya K. Edemskiy
  • Institute of Atmospheric Physics, Czech Academy of Sciences, Prague, Czech Republic

Abstract. The paper is dedicated to investigation of localized TEC (total electron content) enhancements (LTEs), particularly of LTE series, detected in the Southern Hemisphere using global ionospheric maps for different solar activity years (2014, 2015, 2018). It is shown that LTE intensity varies in dependence on solar flux and does not directly depend on interplanetary magnetic field orientation. The enhancements occur in a subsolar region and could be observed during a continuous series of days. The highest LTE occurrence rate is observed during period of local winter (April-September) for all analyzed years. The longest observed LTE series was detected during 2014 and lasted 80 days or 120 days if we exclude 2 daily gaps.

Ilya K. Edemskiy
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Ilya K. Edemskiy
Ilya K. Edemskiy
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Latest update: 13 Oct 2019
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Short summary
The paper investigates feature in Southern hemisphere ionosphere, which is observed near midday in a form of localized enhancement of electron density. Being discovered in global ionospheric maps enhancements were observed via in-situ measurements of electron concentration as well. The probability of its detection is maximal during autumn-winter period and seems not to be directly dependent on geomagnetic indices and solar wind parameters.
The paper investigates feature in Southern hemisphere ionosphere, which is observed near midday...
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