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1. Multiple Strokes Along the Same Channel to Ground in Positive Lightning Produced by a Supercell

   https://doi.org/10.1029/2021GL096714  

   Zhu, Yanan; Bitzer, Phillip; Rakov, Vladimir; Stock, Michael; Lapierre, Jeff; DiGangi, Elizabeth; Ding, Ziqin; Medina, Bruno; Carey, Lawrence; Lang, Timothy (December 2021, Geophysical Research Letters)

   Abstract Previous studies have shown that subsequent leaders in positive cloud‐to‐ground lightning (+CG) flashes rarely traverse pre‐existing channels to ground. In this paper, we present evidence that this actually can be common, at least for some thunderstorms. Observations of +CG flashes in a supercell storm in Argentina by Córdoba Argentina Marx Meter Array (CAMMA) are presented, in which 54 (64%) of 84 multiple‐stroke +CG flashes had subsequent leaders following a pre‐existing channel to ground. These subsequent positive leaders are found to behave similarly to their negative counterparts, including propagation speeds along pre‐existing channels with a median of 8 × 10⁶ m/s, which is comparable to that of negative dart leaders. Two representative multiple‐stroke +CG flashes are presented and discussed in detail. The observations reported herein call for an update to the traditional explanation of the disparity between positive and negative lightning. 

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2. Examining the Capacity of Hurricane Matthew (2016) in Spawning Halo/Sprite‐Producible Lightning Strokes During Its Lifetime

   https://doi.org/10.1029/2021JD035097  

   Huang, Anjing; Yang, Jing; Cummer, Steven A.; Lyu, Fanchao; Liu, Ningyu (July 2021, Journal of Geophysical Research: Atmospheres)
3. Characteristics of upward-connecting-leader current leading to attachment in downward negative cloud-to-ground lightning strokes

   https://doi.org/10.1016/j.atmosres.2023.106943  

   Nag, Amitabh; Cummins, Kenneth L.; Plaisir, Mathieu N.; Brown, Robert G.; Wilson, Jennifer G.; Crawford, David E.; Noggle, R. Carl; Rassoul, Hamid K. (October 2023, Atmospheric Research)
4. Ground‐Based Observation of a TGF Occurring Between Opposite Polarity Strokes of a Bipolar Cloud‐To‐Ground Lightning Flash

   https://doi.org/10.1029/2021JD036130  

   Kereszy, I.; Rakov, V. A.; Ding, Z.; Dwyer, J. R. (May 2022, Journal of Geophysical Research: Atmospheres)
5. High-Speed Video Camera and Geostationary Lightning Mapper Measured Signatures of Cloud-to-Ground Strokes with and without Significant Continuing Current

   Mark, Megan; Nag, Amitabh; Cummins, Kenneth L; Plaisir, Mathieu N; Goldberg, Dylan J; Imam, Abdullah Y; Rassoul, Hamid K (September 2024, International Conference on Lightning Protection)