科学家拍到罕见反常闪电 由地面射向75公里高空
文章来源: chewi 于
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美国科学家日前在北卡罗来纳州抢拍到一次非同寻常的闪电。这次闪电没有击中地表的建筑和森林,而是反常地由地面射向高空的电离层。闪电异常迅速,眨眼间便垂直射向75公里的高空。
美国北卡罗来纳州杜克大学的史蒂芬·库莫和同事近日在观测闪电时,捕捉到了这次罕见的闪电,并即时进行了拍摄。
库莫介绍说:“尽管光线较弱,但由于是满月,我们及时拍摄到了。当时那一瞬间大约只有1秒钟,不过我们同时进行了磁场测量。结果显示,这次闪电向电离层放射了大量电荷,放电量约为1000到2000库仑。”
据悉,这种由地面射向高空的罕见闪电迄今为止人们仅观察到5次,首次发现在2001年,科学家为它命名为“喷气式飞机”。这种闪电与我们通常见到的闪电类似,但又是两种完全不同的自然现象。“喷气式飞机”通常在雷雨天气出现,可以射向90公里远的高空。
库莫已经将这一发现撰文发表在最新的《自然-地理科学》杂志上。
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