论文标题
估计火星2020 MEDA数据中火星涡流的高度
Estimating the Heights of Martian Vortices from Mars 2020 MEDA Data
论文作者
论文摘要
小小的对流涡旋无处不在地发生在火星上，通常是尘埃魔鬼，它们在气象数据中产生可检测的信号 - 在压力，温度以及风速和方向上。除了成为火星尘埃预算的重要贡献者外，对流涡旋还可以作为边界层的探针，为对流不稳定性，边界层昼夜演化和表面 - 大气相互作用提供线索。使用涡流作为边界层探针需要详细了解其性质与发生率之间的联系以及产生它们的条件。幸运的是，火星环境动力学分析仪（MEDA）仪器套件的数据越来越多，火星2020年毅力漫游车有望阐明这些关系。在这项研究中，我们介绍了从Mission Sols 90到179的涡旋检测目录，以根据SOLS 15到89来加强我们以前的目录。与预测一致，我们在任务的下半场发现了比上半年更多的涡旋相遇。除了分析这些涡旋相遇的压力信号外，我们还使用高斯工艺分析来恢复同时的温度信号。通过将这些信号与长期建立的热力学模型相结合，我们估算了涡流的高度，并与先前的工作以及关于火星边界层的昼夜生长和衰减的证据一致。我们还讨论了使用火星涡流相遇的其他边界层研究的前景。
Small convective vortices occur ubiquitously on Mars, frequently as dust devils, and they produce detectable signals in meteorological data -- in pressure, temperature, and wind speed and direction. In addition to being important contributors to the martian dust budget, convective vortices may serve as probes of the boundary layer, providing clues on convective instability, boundary layer diurnal evolution, and surface-atmosphere interactions. Using vortices as boundary layer probes requires a detailed understanding of the link between their properties and occurrence rates and the conditions that produce them. Fortunately, the growing cache of data from the Mars Environmental Dynamics Analyzer (MEDA) instrument suite onboard the Mars 2020 Perseverance rover promises to elucidate these relationships. In this study, we present a catalog of vortex detections from mission sols 90 through 179 to bolster our previous catalog based on sols 15 through 89. Consistent with predictions, we find more vortex encounters during this second half of the mission than from the first half. In addition to analyzing the pressure signals from these vortex encounters, we also use a Gaussian process analysis to recover contemporaneous temperature signals. By combining these signals with a long-established thermodynamics model, we estimate heights of the vortices and find some agreement with previous work and evidence for the diurnal growth and decay of the martian boundary layer. We also discuss prospects for additional boundary layer studies using martian vortex encounters.
