Albedo analysis of dust devil-induced slope streaks and tracks on Mars

IF 2.5 2区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Icarus Pub Date : 2024-08-22 DOI:10.1016/j.icarus.2024.116270

T. Heyer , J. Raack , W. Iqbal , H. Hiesinger , A. Oetting

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Abstract

Despite frequent observations of slope streaks and dust devil tracks on the same slopes in various regions on Mars, only a few instances in Arabia Terra have documented slope streaks directly triggered by dust devils. Here we present new observations of dust devil-induced slope streaks in Elysium Planitia and Amazonis Planitia. These observations represent a rare opportunity to study the erosional effects of both dust devils and slope streaks on the martian surface. Since dust devil tracks and the triggered streaks are formed basically simultaneously and are therefore subject to similar alteration processes, e.g., settling dust from the atmosphere, the relative albedo of these features can be determined using high-resolution orbital images. Our relative albedo analyses of twelve dust devil-induced slope streaks revealed that slope streaks appear substantially darker than the respective dust devil tracks. These observations might indicate a stronger erosion of fine-grained material by slope streaks compared to dust devils.

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火星上尘埃魔鬼诱发的斜坡条纹和轨迹的反照率分析

尽管在火星的不同区域经常观测到斜坡条纹和尘埃粒子在同一斜坡上留下的痕迹，但只有阿拉伯地球上的少数几个实例记录了由尘埃粒子直接引发的斜坡条纹。在这里，我们展示了在极乐星（Elysium Planitia）和亚马逊星（Amazonis Planitia）观测到的尘埃粒子诱发的斜坡条纹。这些观测结果为研究尘埃粒子和斜坡条纹对火星表面的侵蚀作用提供了难得的机会。由于尘埃魔鬼的轨迹和触发的条纹基本上是同时形成的，因此受到类似的改变过程的影响，如大气中尘埃的沉降，这些特征的相对反照率可以通过高分辨率轨道图像来确定。我们对 12 条尘埃魔鬼诱发的斜坡条纹进行的相对反照率分析表明，斜坡条纹的颜色比相应的尘埃魔鬼轨迹要深得多。这些观测结果可能表明，与尘埃魔鬼相比，斜坡条纹对细粒物质的侵蚀更强。

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来源期刊

Icarus 地学天文-天文与天体物理

CiteScore

6.30

自引率

18.80%

发文量

356

审稿时长

2-4 weeks

期刊介绍： Icarus is devoted to the publication of original contributions in the field of Solar System studies. Manuscripts reporting the results of new research - observational, experimental, or theoretical - concerning the astronomy, geology, meteorology, physics, chemistry, biology, and other scientific aspects of our Solar System or extrasolar systems are welcome. The journal generally does not publish papers devoted exclusively to the Sun, the Earth, celestial mechanics, meteoritics, or astrophysics. Icarus does not publish papers that provide "improved" versions of Bode''s law, or other numerical relations, without a sound physical basis. Icarus does not publish meeting announcements or general notices. Reviews, historical papers, and manuscripts describing spacecraft instrumentation may be considered, but only with prior approval of the editor. An entire issue of the journal is occasionally devoted to a single subject, usually arising from a conference on the same topic. The language of publication is English. American or British usage is accepted, but not a mixture of these.