Have you ever wondered what is above Thunderstorms?
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modified: 2020-07-09T22:34:20Z
created: 2018-04-19T15:16:39Z
link: https://boomersclub.com.au/2018/04/19/have-you-ever-wondered-what-is-above-thunderstorms/
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encoded: In recent decades, researchers have begun looking at some strange optical phenomena in the cloud tops. High above ordinary lightning, exotic forms known as sprites and elves shoot upwards to the electrically charged ionosphere. They are cool and colourful relatives to the sizzling bolts that plunge down towards the Earth.Once referred to as Upper-atmospheric lightning or Ionospheric Lightning, these short-lived electrical-breakdown phenomena occur well above the altitudes of normal lightning and storm clouds.The terminology that is now preferred is transient luminous event (TLE), because the various types of upper atmospheric electrical-discharge events lack several characteristics of the more familiar tropospheric lightning.TLEs are secondary phenomena that occur in association with underlying thunderstorm lightning.They generally last anywhere from less than a millisecond to more than 2 seconds.There are several types of TLEs, the most common being sprites. Sprites are flashes of bright red light that occur above storm systems. Other types of TLEs include sprite halos, blue jets, blue starters, elves, gnomes and trolls. Sprites and Elves Airline pilots first noticed these flashes while flying over severe thunderstorms and later, they appeared on videos taken from NASA’s space shuttles. “Sprite” stands for Stratospheric/Mesospheric Perturbations Resulting from Intense Thunderstorm Electrification, and “elve” for Emissions of Light and VLF perturbations from EMP events. Sprites have a distinctive delicate shape, much like a small human form, which flashes for only a fraction of a second in the sky. They are primarily red in colour, except sometimes there is a bluish tinge in the downward extending tendrils. Current thinking is that sprites result when free electrons in the thin atmosphere are accelerated by the sudden change in electric field strength caused by the parent lightning discharge far below. When the electrons slam into molecules of nitrogen, they cause t…
content: In recent decades, researchers have begun looking at some strange optical phenomena in the cloud tops. High above ordinary lightning, exotic forms known as sprites and elves shoot upwards to the electrically charged ionosphere. They are cool and colourful relatives to the sizzling bolts that plunge down towards the Earth.Once referred to as Upper-atmospheric lightning or Ionospheric Lightning, these short-lived electrical-breakdown phenomena occur well above the altitudes of normal lightning and storm clouds.The terminology that is now preferred is transient luminous event (TLE), because the various types of upper atmospheric electrical-discharge events lack several characteristics of the more familiar tropospheric lightning.TLEs are secondary phenomena that occur in association with underlying thunderstorm lightning.They generally last anywhere from less than a millisecond to more than 2 seconds.There are several types of TLEs, the most common being sprites. Sprites are flashes of bright red light that occur above storm systems. Other types of TLEs include sprite halos, blue jets, blue starters, elves, gnomes and trolls. Sprites and Elves Airline pilots first noticed these flashes while flying over severe thunderstorms and later, they appeared on videos taken from NASA’s space shuttles. “Sprite” stands for Stratospheric/Mesospheric Perturbations Resulting from Intense Thunderstorm Electrification, and “elve” for Emissions of Light and VLF perturbations from EMP events. Sprites have a distinctive delicate shape, much like a small human form, which flashes for only a fraction of a second in the sky. They are primarily red in colour, except sometimes there is a bluish tinge in the downward extending tendrils. Current thinking is that sprites result when free electrons in the thin atmosphere are accelerated by the sudden change in electric field strength caused by the parent lightning discharge far below. When the electrons slam into molecules of nitrogen, they cause t…
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