Observations of Blue Corona Discharges in Thunderclouds
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Observations of Blue Corona Discharges in Thunderclouds. / Husbjerg, Lasse Skaaning; Neubert, Torsten; Chanrion, Olivier; Dimitriadou, Krystallia; Li, Dongshuai; Stendel, Martin; Kaas, Eigil; ostgaard, Nikolai; Reglero, Victor.
I: Geophysical Research Letters, Bind 49, Nr. 12, e2022GL099064, 28.06.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Observations of Blue Corona Discharges in Thunderclouds
AU - Husbjerg, Lasse Skaaning
AU - Neubert, Torsten
AU - Chanrion, Olivier
AU - Dimitriadou, Krystallia
AU - Li, Dongshuai
AU - Stendel, Martin
AU - Kaas, Eigil
AU - ostgaard, Nikolai
AU - Reglero, Victor
PY - 2022/6/28
Y1 - 2022/6/28
N2 - Blue electric streamer discharges in the upper reaches of thunderclouds are observed as flashes of 337.0 nm (blue) with faint or no emissions of 777.4 nm (red). Analyzing 3 years of measurements by the Atmosphere-Space Interactions Monitor on the International Space Station, we find that their distribution in rise time falls into two categories. One with fast rise times of 30 mu s or less that are relatively unaffected by cloud scattering and emanate from within similar to 2 km of the cloud tops, and another with longer rise times from deeper within the clouds. 50% of cells generating shallow events are associated with overshooting tops compared to 34% of cells generating deeper events. The median Convective Available Potential Energy of the cells is similar to 70% higher for the shallow events and similar to 38% higher for the deeper events than for lightning cells, suggesting the discharges are favored by strongly convective environments.
AB - Blue electric streamer discharges in the upper reaches of thunderclouds are observed as flashes of 337.0 nm (blue) with faint or no emissions of 777.4 nm (red). Analyzing 3 years of measurements by the Atmosphere-Space Interactions Monitor on the International Space Station, we find that their distribution in rise time falls into two categories. One with fast rise times of 30 mu s or less that are relatively unaffected by cloud scattering and emanate from within similar to 2 km of the cloud tops, and another with longer rise times from deeper within the clouds. 50% of cells generating shallow events are associated with overshooting tops compared to 34% of cells generating deeper events. The median Convective Available Potential Energy of the cells is similar to 70% higher for the shallow events and similar to 38% higher for the deeper events than for lightning cells, suggesting the discharges are favored by strongly convective environments.
KW - atmospheric lightning
KW - blue discharges
KW - overshooting top
KW - convection
KW - ELECTRICAL DISCHARGES
KW - LUMINOUS EVENTS
KW - TOPS
U2 - 10.1029/2022GL099064
DO - 10.1029/2022GL099064
M3 - Journal article
VL - 49
JO - Geophysical Research Letters (Online)
JF - Geophysical Research Letters (Online)
SN - 1944-8007
IS - 12
M1 - e2022GL099064
ER -
ID: 312497569