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

• Main Authors: Hiyadutuje, Alicreance, Habarulema, John Bosco, Kosch, Michael, Stephenson, Judy, Xiangcai, Chen, Tshimangadzo, Matamba
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Farley; Zhongshan; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.57757/iugg23-1088; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018129

<!--!introduction!--> 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) ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...