Analysis of blue corona discharges at the top of tropical thunderstorm clouds in different phases of convection

Krystallia Dimitriadou*, Olivier Chanrion, Torsten Neubert, Alain Protat, Valentin Louf, Matthias Heumesser, Lasse Husbjerg, Christoph Köhn, Nikolai Østgaard, Victor Reglero

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We report on observations of corona discharges at the uppermost region of clouds characterized by emissions in a blue band of nitrogen molecules at 337 nm, with little activity in the red band of lightning leaders at 777.4 nm. Past work suggests that they are generated in cloud tops reaching the tropopause and above. Here we explore their occurrence in two convective environments of the same storm: one is developing with clouds reaching above the tropopause, and one is collapsing with lower cloud tops. We focus on those discharges that form a distinct category with rise times below 20 μs, implying that they are at the very top of the clouds. The discharges are observed in both environments. The observations suggest that a range of storm environments may generate corona discharges and that they may be common in convective surges.
Original languageEnglish
Article numbere2021GL095879
JournalGeophysical Research Letters
Volume49
Issue number6
ISSN0094-8276
DOIs
Publication statusPublished - 2022

Fingerprint

Dive into the research topics of 'Analysis of blue corona discharges at the top of tropical thunderstorm clouds in different phases of convection'. Together they form a unique fingerprint.

Cite this