《自然》最新研究：木星“大蓝斑”上方磁场变化
北京3月7日电 (记者 孙自法) 国际著名学术期刊《自然》最新发表一篇行星科学论文，研究人员基于美国航空航天局(NASA)“朱诺号”木星探测器的观测结果，研究发现木星“大蓝斑”(Great Blue Spot，木星赤道附近的一个集中磁场)上方的磁场变化。
“大蓝斑”是木星大气层中一个巨大的反气旋风暴，其直径约为地球直径的两倍，已经持续了至少三个世纪。此前，科学家们认为“大蓝斑”上方的磁场相对稳定。
然而，这项最新研究表明，情况并非如此。研究人员利用“朱诺号”探测器携带的磁强计数据，发现“大蓝斑”上方的磁场存在显著变化。
研究人员发现，在“大蓝斑”的中心区域，磁场强度比周围区域弱得多。此外，磁场的方向也随着时间的推移而变化，表明“大蓝斑”内部的磁场发生着复杂的动态过程。
研究人员认为，这些磁场变化可能是由“大蓝斑”内部的湍流和对流活动引起的。这些活动会产生电荷分离，从而产生磁场。
这项研究有助于科学家们更好地了解木星大气层的动力学，以及“大蓝斑”的形成和演化过程。
英语如下：
**Headline:** Jupiter’s Great Blue Spot’s Magnetic Field Is a DynamicEnigma
**Keywords:** Jupiter’s magnetic field, Great Blue Spot, Juno
**Body:**
A new study published in the journal Nature has revealed thatthe magnetic field above Jupiter’s Great Blue Spot is highly variable.
The Great Blue Spot is a giant anticyclonic storm in Jupiter’s atmosphere, about twice the diameter of Earth and has been raging for at least three centuries. Scientists previously thought that the magnetic field above the Great Blue Spot was relatively stable.
However, this latest study shows that this is not the case. Using data from the magnetometer instrument aboard NASA’s Juno spacecraft, the researchers found that the magnetic field above the Great Blue Spot varies significantly.
They found that in the central region of the Great Blue Spot, the magnetic field is much weaker than in the surrounding areas. Additionally, the direction of the magnetic field changes over time, indicating that complex and dynamic processes are occurring within the Great Blue Spot.
The researchers believe that these magnetic field variations are likely caused by turbulent and convective motions within the Great Blue Spot. These motions can separate electrical charges, which thengenerate magnetic fields.
This study helps scientists better understand the dynamics of Jupiter’s atmosphere, as well as the formation and evolution of the Great Blue Spot.
【来源】http://www.chinanews.com/gj/2024/03-07/10176077.shtml
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