当前位置: X-MOL 学术J. Geophys. Res. Planets › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The Aeolian Environment of the Landing Site for the ExoMars Rosalind Franklin Rover in Oxia Planum, Mars
Journal of Geophysical Research: Planets ( IF 3.9 ) Pub Date : 2021-02-01 , DOI: 10.1029/2020je006723
E.A. Favaro 1 , M.R. Balme 1 , J. Davis 2 , P.M Grindrod 2 , P. Fawdon 1 , A.M. Barrett 1 , S.R. Lewis 1
Affiliation  

Aeolian features at Oxia Planum—the 2023 landing site for the ExoMars Rosalind Franklin Rover (ERFR)—are important for Mars exploration because they record information about past and current wind regimes, sand transport vectors, and lend insight to the abrasion, deposition, and transport of granular material. To characterize the wind regime and erosional history of Oxia Planum we used a combination of manual observational and machine‐learning techniques to analyze the morphometrics, distribution, and orientation of 10,753 aeolian bedforms (Transverse Aeolian Ridges[TARs]) and landforms (Periodic Bedrock Ridges [PBRs]) around the ERFR landing ellipses. We found that, irrespective of the scale of the TARs, crestline azimuths are consistent across the study area and we infer that the bedform forming winds blew from NW‐NNW toward SE‐SSE. PBR azimuths show a substantively different orientation to the aeolian bedforms, and we infer that the winds necessary to abrade PBRs had a N‐NNE or S‐SSE orientation (180° ambiguity). From observations of active dust devils and windstreaks from repeat imagery, we infer a W‐WNW or E‐ESE (180° ambiguity) wind dominates today. Finally, we compare the inferred wind direction results from the aeolian landscape to modeled wind data from Mars Global Circulation Models. We note that, despite landscape evidence to the contrary, modeled contemporary wind direction lacks the consistent directionality to be responsible for the orientation of aeolian features in Oxia Planum. These results characterize aeolian features ERFR will encounter and suggests multiple wind regimes have influenced the surficial expression of the landing site.

中文翻译:

火星Oxia Planum的ExoMars Rosalind Franklin Rover着陆点的风沙环境

Oxia Planum的风神特征-2023年ExoMars Rosalind Franklin着陆点罗孚(ERFR)对火星探测很重要,因为它们会记录有关过去和当前的风况,砂子运输矢量的信息,并有助于洞察颗粒材料的磨损,沉积和运输。为了表征Oxia Planum的风况和侵蚀历史,我们结合了人工观测和机器学习技术,分析了10,753个风成因岩床(横向风成岭[TARs])和地貌(周期性基岩山脊)的形态,分布和方向。 [PBR])围绕ERFR着陆椭圆。我们发现,不管TAR的规模如何,整个研究区域的顶线方位角都是一致的,并且我们可以推断出,从NW-NNW向SE-SSE吹动了地层风。PBR方位角与风成岩床的方位明显不同,并且我们推断,磨损PBR所需的风向为N‐NNE或S‐SSE(180°歧义)。从重复影像中活动尘埃和风条纹的观察中,我们推断出今天的W-WNW或E-ESE(180度歧义)风占主导地位。最后,我们将推断的风向风向结果与来自火星全球环流模型的风向数据进行了建模。我们注意到,尽管有相反的景观证据,但模拟的现代风向缺乏一致的方向性,无法对Oxia Planum中的风沙特征进行定位。这些结果表征了ERFR将会遇到的风沙特征,并表明多种风况已影响着陆点的表面表达。从重复影像中活动尘埃和风条纹的观察中,我们可以推断出今天的W-WNW或E-ESE(180度歧义)风占主导地位。最后,我们将推断的风向风向结果与来自火星全球环流模型的风向数据进行了建模。我们注意到,尽管有相反的景观证据,但模拟的现代风向缺乏一致的方向性,无法对Oxia Planum中的风沙特征进行定位。这些结果表征了ERFR将会遇到的风沙特征,并表明多种风况已影响着陆点的表面表达。从重复影像中活动尘埃和风条纹的观察中,我们可以推断出今天的W-WNW或E-ESE(180度歧义)风占主导地位。最后,我们将推断的风向风向结果与来自火星全球环流模型的风向数据进行了建模。我们注意到,尽管有相反的景观证据,但模拟的现代风向缺乏一致的方向性,无法对Oxia Planum中的风沙特征进行定位。这些结果表征了ERFR将会遇到的风沙特征,并表明多种风况已影响着陆点的表面表达。我们将推断的风向风向结果与火星全球环流模型的风向数据进行了比较。我们注意到,尽管有相反的景观证据,但模拟的现代风向缺乏一致的方向性,无法对Oxia Planum中的风沙特征进行定位。这些结果表征了ERFR将会遇到的风沙特征,并表明多种风况已影响着陆点的表面表达。我们将推断的风向风向结果与火星全球环流模型的风向数据进行了比较。我们注意到,尽管有相反的景观证据,但模拟的现代风向缺乏一致的方向性,无法对Oxia Planum中的风沙特征进行定位。这些结果表征了ERFR将会遇到的风沙特征,并表明多种风况已影响着陆点的表面表达。
更新日期:2021-04-02
down
wechat
bug