Observation of the onset of a blue jet into the stratosphere
- 20 January 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature
- Vol. 589 (7842), 371-375
- https://doi.org/10.1038/s41586-020-03122-6
Abstract
Blue jets are lightning-like, atmospheric electric discharges of several hundred millisecond duration that fan into cones as they propagate from the top of thunderclouds into the stratosphere1. They are thought to initiate in an electric breakdown between the positively charged upper region of a cloud and a layer of negative charge at the cloud boundary and in the air above. The breakdown forms a leader that transitions into streamers2 when propagating upwards3. However, the properties of the leader, and the altitude to which it extends above the clouds, are not well characterized4. Blue millisecond flashes in cloud tops5,6 have previously been associated with narrow bipolar events7,8, which are 10- to 30-microsecond pulses in wideband electric field records, accompanied by bursts of intense radiation at 3 to 300 megahertz from discharges with short (inferred) channel lengths (less than one kilometre)9,10,11. Here we report spectral measurements from the International Space Station, which offers an unimpeded view of thunderclouds, with 10-microsecond temporal resolution. We observe five intense, approximately 10-microsecond blue flashes from a thunderstorm cell. One flash initiates a pulsating blue jet to the stratopause (the interface between the stratosphere and the ionosphere). The observed flashes were accompanied by ‘elves’12 in the ionosphere. Emissions from lightning leaders in the red spectral band are faint and localized, suggesting that the flashes and the jet are streamer ionization waves, and that the leader elements at their origin are short and localized. We...This publication has 41 references indexed in Scilit:
- Highly intense lightning over the oceans: Estimated peak currents from global GLD360 observationsJournal of Geophysical Research: Atmospheres, 2013
- Satellite-observed cold-ring-shaped features atop deep convective cloudsAtmospheric Research, 2010
- Upward electrical discharges from thunderstormsNature Geoscience, 2008
- Comparison of results from sprite streamer modeling with spectrophotometric measurements by ISUAL instrument on FORMOSAT‐2 satelliteGeophysical Research Letters, 2006
- Simulations of lightning optical waveforms as seen through clouds by satellitesPublished by American Geophysical Union (AGU) ,2001
- Elves: Lightning‐induced transient luminous events in the lower ionosphereGeophysical Research Letters, 1996
- Blue starters∷ Brief upward discharges from an intense Arkansas thunderstormGeophysical Research Letters, 1996
- Preliminary results from the Sprites94 Aircraft Campaign: 2. Blue jetsGeophysical Research Letters, 1995
- Critical review of ultraviolet photoabsorption cross sections for molecules of astrophysical and aeronomic interestReviews of Geophysics, 1971
- Ultraviolet Solar Radiation Related to Mesospheric ProcessesPublished by Springer Science and Business Media LLC ,1971