Pervasive aeolian activity along rover Curiosity's traverse in Gale Crater, Mars

被引：103

作者：

Silvestro, Simone ^{[1
]}

Vaz, D. A. ^{[2
,3
]}

Ewing, R. C. ^{[4
]}

Rossi, A. P. ^{[5
]}

Fenton, L. K. ^{[1
]}

Michaels, T. I. ^{[1
]}

Flahaut, J. ^{[6
]}

Geissler, P. E. ^{[7
]}

机构：

[1] SETI Inst, Carl Sagan Ctr, Mountain View, CA 94043 USA

[2] Univ Coimbra, Ctr Geophys, Astron Observ, P-3040004 Coimbra, Portugal

[3] Inst Super Tecn, CERENA, P-1049001 Lisbon, Portugal

[4] Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA

[5] Jacobs Univ, D-28759 Bremen, Germany

[6] Univ Paris 11, CNRS, Inst Astrophys Spatiale, F-91405 Orsay, France

[7] US Geol Survey, Flagstaff, AZ 86001 USA

来源：

GEOLOGY | 2013年 / 41卷 / 04期

关键词：

WINDS;

D O I：

10.1130/G34162.1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The NASA Mars Science Laboratory (MSL) rover, Curiosity, has safely landed near a 35-km-long dark dune field in Gale Crater on Mars. This dune field crosses the landing site from the northeast to the southwest and lies along Curiosity's traverse to Aeolis Mons. Here we present the first evidence of recent aeolian activity in the form of ripple and dune migration, and further estimate wind directions within the dune field through analysis of ripple and dune morphologies and the Mars Regional Atmospheric Modeling System (MRAMS). We measured a minimum ripple migration rate of 0.66 m per Earth year, and dune migration rate of 0.4 m per Earth year, in the southwest portion of the field. A strongly bidirectional ripple crestline orientation, nearly orthogonal dune slipfaces, and linear seif or oblique dunes indicate a bidirectional wind regime with winds mainly coming from the ENE and from the northwest; however, MRAMS results indicate primary winds from the ENE. Our constraints on the wind regime provide the unique opportunity to use ground measurements from MSL to test the accuracy of winds predicted from orbital data.

引用

页码：483 / 486

页数：4

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