闪电掠过意大利
(原标题: ELVES Lightning over Italy)
2023-04-17
浏览次数: 15
天空中那个红色的环是什么？闪电。最常见的一种闪电是在云层之间发出明亮的白光。在过去的50年里，其他类型的高层大气闪电已经被证实，包括红色精灵和蓝色喷流。不太为人所知、更难拍摄的是另一种被称为精灵的高层大气闪电。elf被认为是当电磁脉冲从带电云向上发射并撞击电离层时产生的，导致氮分子发光。照片中的红色精灵光环半径约为350公里，拍摄于3月底意大利安科纳上空约100公里处。多年的经验和超高速摄影技术被用来捕捉这种精灵——它只持续了大约0.001秒。
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What's that red ring in the sky? Lightning. The most commonly seen type of lightning involves flashes of bright white light between clouds. Over the past 50 years, though, other types of upper-atmospheric lightning have been confirmed, including red sprites and blue jets. Less well known and harder to photograph is a different type of upper atmospheric lightning known as ELVES. ELVES are thought to be created when an electromagnetic pulse shoots upward from charged clouds and impacts the ionosphere, causing nitrogen molecules to glow. The red ELVES ring pictured had a radius of about 350 km and was captured in late March about 100 kilometers above Ancona, Italy. Years of experience and ultra-fast photography were used to capture this ELVES -- which lasted only about 0.001 second.
© Valter Binotto