据 IT 之家 10 月 21 日报道，天文学家使用詹姆斯·韦伯天文望远镜最近拍摄了木星照片，发现了一次远超预期的强烈急流（jet stream），其强度甚至超过 5 级飓风。急流是指狭窄强风带，是大气环流中的一个重要特征。在天气图上观察到的急流带环绕地球自西向东弯曲延伸达几千千米，水平宽度约上千千米，垂直厚度达几千米到十几千米。据科学家介绍，这条急流带延伸 3000 英里（4800 公里），流速为 320 英里/小时（515 公里/小时），几乎是下方云层风的 2 倍，或者说地球上 5 级飓风风速的 2 倍，以摧枯拉朽的强横姿态肆虐土星。
据《自然》杂志同一天发布的论文，该研究由加州大学柏克莱分校天文学家 Imke de Pater、巴黎天文台天文学家 Thierry Fouchet 共同领导。该论文旨在用 4 种不同滤镜检测木星大气层不同高度的微小特征变化。
此次发现对于了解太阳系中气流的性质和演化有着深远的影响。科学家表示，急流是太阳系中一个独特而重要的现象，其对地球和其他行星的气候和天气都有着深远的影响。
新闻翻译：
A new study, published in the journal Nature on October 21st, has revealed an intense narrow equatorial jet in Jupiter’s lower stratosphere, observed by the James Webb Space Telescope. The intensity of the jet is even greater than that of a 5-grade hurricane, with a flow rate of 320 miles per hour (515 kilometers per hour) and a width of more than 3,000 miles (4,800 kilometers). The jet stream is a unique and important phenomenon in the solar system, which has a profound impact on the climate and weather of planets. Scientists say the jet stream is a significant discovery that will help to understand the nature and evolution of the solar system’s atmospheric flows.
The study, which is co-led by Imke de Pater of the University of California, Berkeley and Thierry Fouchet of the Paris Observatory, aims to test four different filters to detect changes in the microscopic features of the upper atmosphere of Jupiter. The findings of the study, which was conducted over a period of several months, will be published in the journal Nature.
【来源】https://www.ithome.com/0/726/497.htm
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