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强烈的木星喷流的深度来自行星规模的干扰,由风暴驱动
A Sánchez-Lavega1, G S Orton, R Hueso
1Departamento de Física Aplicada I, ETS Ingenieros, Universidad del País Vasco, Alameda Urquijo s/n, 48013 Bilbao, Spain. agustin.sanchez@ehu.es
Nature
|January 25, 2008
概括
木星强大的大气喷流是由风向可见云层深处延伸的风为燃料,而不仅仅是太阳辐射. 观测巨大的羽毛支持这一发现,揭示了巨行星气象学的洞察力.
科学领域:
- 行星科学 行星科学
- 大气动力学 大气动力学
- 流体力学 流体力学 流体力学
背景情况:
- 像木星和土星这样的气体巨行星表现出强大的大气喷气,这决定了可见水平的循环.
- 这些喷气的能量来源和垂直结构,特别是在云顶以下,仍然是行星大气科学中未解决的关键问题.
- 之前对深风测量 (24巴) 的解释表明内部热源,但由于气象复杂性,这一点仍然存在争议.
研究的目的:
- 为了研究木星大气喷射的垂直范围和能量来源.
- 分析观察到的大气羽毛的动态及其与喷流的关系.
- 为了解决围绕巨行星大气循环背后驱动力的争议.
主要方法:
- 在北23度的木星大气层中观察到两个不同的羽毛.
- 对羽毛的高度 (30公里以上的云层) 和速度 (169米/秒) 的分析.
- 应用动态建模来解释观测数据并推断风结构.
主要成果:
- 观测到的羽毛表现出异常的速度和垂直范围,超过了其他大气特征.
- 这些羽毛产生了大规模的乱干扰,随之而来的是红色的气溶.
- 动态建模表明,观察到的现象与深度风力一致.
结论:
- 这些发现强烈表明,木星的大气喷流是由风驱动的,风在太阳辐射沉积层以下延伸得很大.
- 这挑战了以前的假设,并支持巨行星大气层中更复杂的能量转移机制.
- 这项研究为深层大气动力学提供了关键证据,这些动力学决定了气体巨头的循环模式.
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