意大利上空的闪电
(原标题: Red Sprites and Circular Elves Lightning over Italy)
2025-12-23
浏览次数: 1521
天空中发生了什么？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，包括触手红色精灵和环精灵。虽然两者都只持续不到一秒的时间，但精灵比它们更常见的放电表亲更亮，更容易拍摄。elf是一种快速膨胀的环，据信是由电磁脉冲从带电云向上发射并撞击电离层，导致氮分子发光时产生的。捕捉任何一种形式的闪电都需要耐心和经验——因为它们通常是分开出现的，所以同时捕捉它们是很罕见的。这张特色图片是上个月底在意大利的posagno拍摄的一段视频中的一帧，上面是亚得里亚海上空的一场遥远的雷暴。
查看原文解释
What's happening 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 tentacled red sprites and ringed ELVES. Although both last only a small fraction of a second, sprites are brighter and easier to photograph than their more common electrical-discharge cousins. ELVES are rapidly expanding rings that are thought to be created when an electromagnetic pulse shoots upward from charged clouds and impacts the ionosphere, causing nitrogen molecules to glow. Capturing either form of lightning takes patience and experience -- capturing them both together, since they usually occur separately, is rare. The featured image is a frame from a video recorded from Possagno, Italy late last month above a distant thunderstorm over the Adriatic Sea.
© Valter Binotto