The South Equatorial Belt of Jupiter, I: Its Life Cycle
The South Equatorial Belt of Jupiter, I: Its Life Cycle
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木星南赤道带，I：它的生命周期
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
J. M. Gómez
中科院分区：
文献类型：
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作者：
A. Sánchez‐Lavega;J. M. Gómez
摘要 木星南赤道带（SEB）位于南纬~10°和~20°之间，代表了带阶段和地带阶段之间周期性变化带的原型。使用各种已发表的观测结果和可见波长的附加数据，对历史记录进行了新的分析，这可以描述云形态模式、纬向和经向运动、纬向风速以及SEB变化的空间和时间尺度。为了统一和清晰，周期的每个阶段都根据传统术语用适当的术语来表示。可以区分以下连续阶段：（i）区域状、全局“淡出”方面（SEBF）； (ii) 一个或多个独立来源在不同经度但固定纬度爆发活动（SEBD0），随后在气旋带内对行星规模的扰动发展和地带性扩展（SEBD）； (iii) 在邻近地区、热带地区（20°S 至 26°S，STrZD）和赤道地区（5°S 至 10°S，EZ 活动）传播活动并形成新的扰动。这个阶段（全局标记为 SEBD1）并不总是在 SEBD 之后发展； (iv) 正常带状阶段（SEB），在此期间可能发生在某些方面模拟 SEBD 的二次爆发（也可能出现 STrZD 和 EZs 扰动）； (v) 循环结束后快速返回到 SEBF 阶段。一份新的综合清单已经编制完毕，其中包括所有记录事件的定量数据和详细评论。我们提出并讨论每个阶段涉及的可能的动态场景。在一篇随附的论文（第二部分）中，详细描述了最近的 SEBD 阶段，该阶段发生于 1993 年 4 月 6 日。该论文中提供的数据描述了迄今为止最详尽的记录事件，并且基于我们在 400 至 890 nm 光谱范围内的观察，这将作为与其他团队在其他波长下进行的同步观察进行比较的指南。
Abstract The South Equatorial Belt (SEB) of Jupiter, located between latitudes ∼10°S and ∼20°S, represents the archetype of a cyclically changing band between the belt and zone stages. A new analysis of the historical records has been performed, using various published observations and additional data in visual wavelengths, which permit characterization of cloud morphology patterns, the zonal and meridional motions, the zonal wind velocities, and the spatial and temporal scales of the variability of the SEB. For uniformity and clarity each phase of the cycle has been denoted with its proper nomenclature based on the traditional one. The following sequential stages can be distinguished: (i) Zone-like, global “fade” aspect (SEBF); (ii) Outbreak of activity with one or more independent sources in different longitudes but fixed latitudes (SEBD0), followed by the development and zonal expansion of a disturbance to planetary scale within the cyclonic band (SEBD); (iii) Propagation of the activity and formation of new disturbances in adjacent regions, tropical (20°S to 26°S, STrZD) and equatorial (5°S to 10°S, EZs activity). This phase, denoted globally as SEBD1 does not always develop after the SEBD; (iv) Normal belt-like stage (SEB), a period during which secondary outbursts simulating in some respects the SEBD can take place (also the STrZD and EZs disturbances can be present); (v) The cycle is completed with a rapid return to the SEBF phase. A new comprehensive list that includes quantitative data and detailed commentaries of all the documented events has been compiled. We propose and discuss possible dynamical scenarios involved in each one of these phases. In an accompanying paper (part II) the recent SEBD phase, whose onset occurred on April 6, 1993, is described in detail. The data presented in that paper describes the most thoroughly documented event to date and is based on our observations in the specral range from 400 to 890 nm, which will serve as a guide for comparisons with simultaneous observations by other teams performed at other wavelengths.