木星的北赤道带和喷流:III,2012年的“北方剧变”
Jupiter's North Equatorial Belt and Jet: III, The 'great northern upheaval' in 2012
摘要:
在论文II中,我们描述了发生在2011-12年的木星北赤道带(NEB)的极端变化:带的静止,缩小和褪色,以及NEB喷流加速到超高速。在这里,我们描述了这种异常状态是如何在2012年结束的,在一场被称为NEB复兴的快速而强烈的扰动中,这是人们记忆中的第一次。与此同时,北温带(NTB)也进入了类似的准备状态,这一状态被一场由超高速NTB喷流上的典型爆发引发的NTB复兴所终结。这两次同时发生的复兴似乎构成了一个从赤道延伸到北纬38度的“北方大动荡”,这可能是有史以来第一次这样的事件。我们比较这两个事件与更典型的“全球性剧变”,其中包括近同时复兴的NTB和南赤道带(SEB),随着赤道着色,我们讨论了目前的理解全球性剧变。
英文摘要:
In Paper II we described the extreme changes in Jupiter's North Equatorial Belt (NEB) which took place in 2011-12: quiescence, narrowing, and fading of the belt, along with acceleration of the prograde NEBs jet to super-fast speed. Here we describe how this anomalous state was terminated in 2012, in a rapid and vigorous disturbance known as a NEB Revival, the first in living memory. At the same time, the North Temperate Belt (NTB) had entered a similar preparatory state, which was terminated by a NTB Revival initiated by a typical outbreak on the super-fast NTBs jet. The two concurrent Revivals appeared to constitute a 'great northern upheaval' that extended from the equator to 38N, which may have been the first such event ever recorded. We compare this dual event with the more typical 'Global Upheavals', which consist of near-simultaneous Revivals of the NTB and the South Equatorial Belt (SEB), along with equatorial coloration, and we discuss the current understanding of Global Upheavals.
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