Jovian Vortex Hunter: A Citizen Science Project to Study Jupiter’s Vortices

IF 3.8 Q2 ASTRONOMY & ASTROPHYSICS
Ramanakumar Sankar, Shawn Brueshaber, Lucy Fortson, Candice Hansen-Koharcheck, Chris Lintott, Kameswara Mantha, Cooper Nesmith and Glenn S. Orton
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引用次数: 0

Abstract

The Jovian atmosphere contains a wide diversity of vortices, which have a large range of sizes, colors, and forms in different dynamical regimes. The formation processes for these vortices are poorly understood, and aside from a few known, long-lived ovals, such as the Great Red Spot and Oval BA, vortex stability and their temporal evolution are currently largely unknown. In this study, we use JunoCam data and a citizen science project on Zooniverse to derive a catalog of vortices, some with repeated observations, from 2018 May to 2021 September, and we analyze their associated properties, such as size, location, and color. We find that different-colored vortices (binned as white, red, brown, and dark) follow vastly different distributions in terms of their sizes and where they are found on the planet. We employ a simplified stability criterion using these vortices as a proxy, to derive a minimum Rossby deformation length for the planet of ∼1800 km. We find that this value of Ld is largely constant throughout the atmosphere and does not have an appreciable meridional gradient.
木星旋涡猎手研究木星旋涡的公民科学项目
彗星大气层中存在着各种各样的漩涡,它们的大小、颜色和形态在不同的动力学状态下有很大的差异。人们对这些漩涡的形成过程知之甚少,除了几个已知的长寿命椭圆形漩涡(如大红斑和椭圆形 BA)之外,漩涡的稳定性及其时间演变目前在很大程度上还不为人所知。在这项研究中,我们利用 JunoCam 数据和 Zooniverse 上的一个公民科学项目,得出了从 2018 年 5 月到 2021 年 9 月的涡旋目录,其中一些涡旋是重复观测的,我们还分析了它们的相关特性,如大小、位置和颜色。我们发现,不同颜色的涡旋(分为白色、红色、棕色和深色)在大小和在地球上的位置分布上大相径庭。我们采用简化的稳定性标准,以这些旋涡为代表,推导出这颗行星的最小罗斯比形变长度为 ∼1800 公里。我们发现这个 Ld 值在整个大气层中基本恒定,没有明显的子午线梯度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
The Planetary Science Journal
The Planetary Science Journal Earth and Planetary Sciences-Geophysics
CiteScore
5.20
自引率
0.00%
发文量
249
审稿时长
15 weeks
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