Gigantic jet discharges evolve stepwise through the middle atmosphere

Oscar A. van der Velde (), Joan Montanyà, Jesús A. López and Steven A. Cummer
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Oscar A. van der Velde: Universitat Politècnica de Catalunya – BarcelonaTech, Colon 1
Joan Montanyà: Universitat Politècnica de Catalunya – BarcelonaTech, Colon 1
Jesús A. López: Universitat Politècnica de Catalunya – BarcelonaTech, Colon 1
Steven A. Cummer: Duke University

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract In 2002 it was discovered that a lightning discharge can rise out of the top of tropical thunderstorms and branch out spectacularly to the base of the ionosphere at 90 km altitude. Several dozens of such gigantic jets have been recorded or photographed since, but eluded capture by high-speed video cameras. Here we report on 4 gigantic jets recorded in Colombia at a temporal resolution of 200 µs to 1 ms. During the rising stage, one or more luminous steps are revealed at 32-40 km, before a continuous final jump of negative streamers to the ionosphere, starting in a bidirectional (bipolar) fashion. The subsequent trailing jet extends upward from the jump onset, with a current density well below that of lightning leaders. Magnetic field signals tracking the charge transfer and optical Geostationary Lightning Mapper data are now matched unambiguously to the precisely timed final jump process in a gigantic jet.

Date: 2019
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DOI: 10.1038/s41467-019-12261-y

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