相关实验视频
Updated: Jul 8, 2026

11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
来自火星探测车Spirit和Opportunity的大气成像结果:
M T Lemmon1, M J Wolff, M D Smith
1Texas A&M University, College Station, TX 77843, USA. lemmon@tamu.edu
概括
火星探测器Spirit和Opportunity测量了大气中的尘埃,发现光学深度随着时间的推移而减少. 尘埃分布均,尺度高度约为11.6公里.
科学领域:
- 行星科学 行星科学
- 大气科学 大气科学
- 火星的探索火星的探索
背景情况:
- 了解火星大气条件对于任务规划和解释地表观测至关重要.
- 以前的研究已经监测了火星大气中的尘埃,但详细的垂直分布和粒子大小数据是有价值的.
研究的目的:
- 使用探测器数据测量和分析古塞夫火山口和Meridiani Planum的大气光学深度和尘埃特性.
- 为了确定火星上大气尘埃的垂直分布和颗粒大小.
主要方法:
- 利用来自Spirit和Opportunity探测器的数据来测量可见的大气光学深度.
- 分析了主要90S任务的光学深度趋势.
- 从大气测量中计算出尘埃尺度高度和平均粒子半径.
主要成果:
- 在Gusev火山口和Meridiani Planum两处都记录了0.9的可见大气光学深度.
- 在任务期间,大气光学深度每日下降0.60.7%.
- 在古塞夫火山口的尘埃垂直分布表明均混合,尺度高度为11.56 ± 0.62公里.
- 在两个位置的平均尘埃粒子半径被确定为大约1.5微米.
- 计算出了2.0 ± 0.2的可见到红外光学深度比.
结论:
- 火星大气层在主要任务持续时间内显示出可测量的尘埃光学深度下降.
- 尘埃的垂直分布表明古塞夫火山口有一个混合良好的大气.
- 确定的尘埃特性为气候模型和未来的火星任务提供了宝贵的数据.
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