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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.
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.
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.
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'.
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.
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.
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.
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."
Nu er der nyt fra Danmarks store rummission ASIM, som blev sendt i rummet i fjor, hvor DTU Space er videnskabelig leder. Forskerne kan nu forklare mere om de voldsomme fænomener, der opstår i forbindelse med tordenvejr over skyerne. Den nye viden er netop publiceret i det videnskabelige tidsskrift Science.