火星子午线上风化地貌的季节性

IF 2.5 2区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Icarus Pub Date : 2024-09-19 DOI:10.1016/j.icarus.2024.116325
J. Kozakiewicz , D. Maj , S. Mol , M. Sobucki , T. Michaels , N. Frodyma
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引用次数: 0

摘要

风与火星表面相互作用,形成风化地貌。这些地貌的方位告诉我们形成风的方向。对火星年 26 至 38 年间子午线上风化地貌方位的观测表明,该地区的形成风向具有季节性。所研究的地貌在夏季主要由东南风形成,而在冬季则由多个风向共同作用形成。在整个火星年中,最主要的形成风向是西北风。冬季出现的朝向西方的暗风条纹表明,正如之前数值模拟所预测的那样,子午线在这个季节会出现东风。研究还发现,风化放气导致较小的沙丘被完全侵蚀,而相对强烈的放气是造成子午线上细粒波纹稀少的原因。在这一地区,仅在少数几个地点发现了细粒波纹,它们主要是波长达几厘米的小床层。
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Seasonality of aeolian landforms on Meridiani Planum, Mars
The wind interacts with the surface of Mars, forming aeolian landforms. The orientation of these landforms informs us about the formative wind directions. The observations of the orientation of aeolian landforms on Meridiani Planum between Mars years 26 and 38 indicated that there is a seasonality of formative wind directions in this region. The studied landforms were shaped by a predominant SE wind during summer, while during winter several wind directions played a role in their formation. Throughout the Mars year, the most formative were the NW winds. The presence of dark wind streaks oriented toward the west during winter indicates that E winds occur in this season on Meridiani Planum, as previously predicted by numerical simulations. It was also found that aeolian deflation led to complete erosion of smaller dunes, and that the relatively strong deflation was responsible for the scarcity of fine-grained ripples on Meridiani Planum. In this region, fine-grained ripples were found only in a few locations, and they were mainly small bedforms with wavelengths up to several centimeters.
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来源期刊
Icarus
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.
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