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  Long term statistical analysis of coupling between F-region Travelling Ionospheric Disturbances and E-region instabilities observed by Zhongshan HF radar

Hiyadutuje, A., Habarulema, J. B., Kosch, M., Stephenson, J., Xiangcai, C., Tshimangadzo, M. (2023): Long term statistical analysis of coupling between F-region Travelling Ionospheric Disturbances and E-region instabilities observed by Zhongshan HF radar, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1088

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018129 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018129_2
Genre: Conference Paper

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Hiyadutuje, Alicreance1, Author
Habarulema, John Bosco1, Author
Kosch, Michael1, Author
Stephenson, Judy1, Author
Xiangcai, Chen1, Author
Tshimangadzo, Matamba1, Author
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1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Long term statistical analysis of coupling between F-region Travelling Ionospheric Disturbances and E-region instabilities observed by Zhongshan HF radar Medium Scale Travelling Ionospheric Disturbances (MSTIDs) and Near Range Echoes (NREs) are both natural phenomena observed by SuperDARN High Frequency (HF) radars. In this study, we use the Zhongshan SuperDARN HF radar (69.37° S, 76.38° E) in Antarctica to observe MSTIDs and NREs in the far and near ranges, respectively. It is now established that MSTIDs partially modulate NREs caused by the Gradient Drift Instability (GDI) via the polarization electric field. For the first time, we show that apart from GDI, the NREs caused by Farley Buneman Instability (FBI) may also be partially modulated by the MSTIDs. The Spearman Correlation Coefficient (SCC) shows that ~6 -21% of the NREs backscatter power could be statistically explained by the MSTIDs backscatter power received by the same radar. We also perform a long term (2010 - 2019) statistical analysis of MSTIDs-NREs events. The majority occurred in summer, followed by the equinoxes and the minority took place in winter. The statistics also show that a big number occurred during quiettime. Their daily variation indicates that the majority took place during local night and morning and we attribute most of these MSTIDs to the Perkins instability.

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Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
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 Identifiers: DOI: 10.57757/IUGG23-1088
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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