Norske forskere har avslørt lynets hemmeligheter

Thu 12 Dec 2019, 13:33


En «gamechanger», sier professor Nikolai Østgaard fra Birkelandsenteret.Fram til begynnelsen av 90-tallet trodde man at gammaglimt, enorme utbrudd av gamma- og røntgenstråler, bare forekom ute i verdensrommet i forbindelse med store kosmiske hendelser. I 1991 oppdaget en amerikansk satellitt at glimtene også forekommer på jorda - om enn i langt mindre skala.

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Avslører lynets hemmeligheter

Thu 12 Dec 2019, 13:27


Gammaglimt, alver og elektronstråler. Via ASIM-instrumentets orkesterplass på Den internasjonale romstasjonen, har forskere ved Universitetet i Bergen avdekket hva som skjer i den høyere atmosfæren når det lyner og tordner.

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ISS sensors show terrestrial gamma-ray flash and ionospheric UV emissions spurred by lightning

Thu 12 Dec 2019, 13:24


A team of researchers from Denmark, Norway, Spain and Italy has found that both terrestrial gamma-ray flashes and ionospheric ultraviolet emissions are spurred by lightning. In their paper published in the journal Science, the group describes their study of data from the Atmosphere-Space Interactions Monitor (ASIM) aboard the International Space Station (ISS), and what they found.

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Leucht-Elfen entstehen durch Gewitterblitze

Thu 12 Dec 2019, 13:20


Gewitterblitze kann man auf der Erde sehen. Piloten berichten schon seit Langem von weiteren Erscheinungen: von sogenannten Kobolden und Jets über den Gewitterwolken. Auch ringförmige Elfen gibt es. Wie sie zustandekommen, haben Forscher nun ergründet.

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Những đám mây trên cao, những tia sét mạnh như tia chớp Gamma-Ray và tia cực tím Yêu tinh

Thu 12 Dec 2019, 13:12


Sử dụng các thiết bị trên Trạm vũ trụ quốc tế, các nhà nghiên cứu đã quan sát các xung gamma trong một phần nghìn giây do giông bão tạo ra, làm rõ quá trình tạo ra các tia sáng này và phát hiện ra rằng chúng có thể tạo ra phát xạ tia cực tím được gọi là Elve.

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Los relámpagos desatan por encima rayos gamma y 'elfos' ultravioletas

Thu 12 Dec 2019, 13:08


Utilizando instrumentos a bordo de la Estación Espacial Internacional, los investigadores han observado pulsos de milisegundos de rayos gamma producidos por tormentas eléctricas. Esta detección aclara el proceso mediante el cual se producen estos destellos y descubren que pueden producir una emisión ultravioleta conocida como 'elfo'.

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La Universitat colidera una investigación espacial que demuestra la correlación entre dos tipos de fenómenos atmosféricos violentos

Thu 12 Dec 2019, 13:03


Una investigación internacional en la que participa la Universitat de València (UV) ha demostrado al nivel de los milisegundos la correlación entre el estallido gamma de alta energía y el desarrollo de tormentas eléctricas. Se trata de dos fenómenos atmosféricos violentos observados desde la Estación Espacial Internacional (ISS) y en los que por primera vez se ha captado la emisión ultravioleta. El artículo se ha publicado en la revista Science.

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Arstechnica | Data from the International Space Station confirms: Lightning is insane

Thu 12 Dec 2019, 13:01


Lightning is such a common phenomenon that people often overlook just how powerful it is (provided it doesn't hit you, obviously). But over the past decade, research has gradually revealed just how extreme lightning is. This everyday phenomenon is powerful enough to produce antimatter and transform atoms, leaving a radioactive cloud in its wake. Understanding how all of this happens, however, is a real challenge, given just how quickly multiple high-energy events take place.

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ISS Sees Thunderstorm Beaming Electromagnetic Pulse Into Area, Producing Gamma Rays and ‘Elves´'

Thu 12 Dec 2019, 12:56


At 8:01 p.m. on October 10, 2018, a bolt of lightning flashed within a storm cloud simply east of the Indonesian island of Sulawesi. The Worldwide Area Station was passing overhead on the time, and a collection of devices noticed because the bolt produced a flash of gamma radiation—and, concurrently, emitted a glowing ring of ultraviolet and visual gentle within the topmost layer of the environment.

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High above the storm clouds, lightning powers gamma-ray flashes and ultraviolet ‘elves‘

Thu 12 Dec 2019, 12:52


Using instruments onboard the International Space Station, researchers have observed millisecond pulses of gamma-rays produced by thunderstorms, clarifying the process by which these flashes are made, and discovering that they can produce an ultraviolet emission known as an "Elve."

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