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Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (6): 88-98.DOI: 10.7522/j.issn.1000-694X.2021.00090

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Comparison of networked dunes in the Earth and the Mars based on DEM

Xuyan Yang1(), Zhibao Dong2(), Qinke Yang1(), Chao Li2   

  1. 1.College of Urban and Environmental Science,Northwest University,Xi'an 710127,China
    2.School of Geography and Tourism,Shaanxi Normal University,Xi'an 710119,China
  • Received:2021-05-06 Revised:2021-07-19 Online:2021-11-20 Published:2021-12-17
  • Contact: Zhibao Dong,Qinke Yang

Abstract:

A dune is an important geomorphologic type in Qaidam Basin, to which the similar type of unit on the Mars can be compared, and the morphological characteristic of a dune is an important study content of the aeolian geomorphology on the Mars. In this paper, geomorphologic characteristics of lattice dunes on the north polar area of the Mars were analyzed in comparison of the dunes in Qaidam Basin on the earth. Digital Terrain Analysis (DTA) was used in the study by considering elevation, slope, aspect and surface complexity. The results show: (1)There is a great similarity of elevation cross-sections, slope steepness, distributions of aspect between the two study sites, ie Qaidam on the Earth, and north pole of the Mars. (2) The histogram similarity index of elevation, elevation gradient, slope steepness and aspect from a statistical analysis are all greater than 0.7. (3) The fractal dimensions remain almost the same at different scales, that means complexities on the two ground surfaces, north pole of the mars and Qaidam, are significantly similar to each other. A quantitative or semi-quantitative study of similarity of aeolian dune geomorphologies between the two planets, the Mars and the Earth, based on Digital Terrain Analysis(DTA)and Histogram Similarity methods, is a new attempt. This study will be expected to provide a scientific evidence for formation and evolution process of the aeolian geomorphologies on the Mars.

Key words: Digital Terrain Analysis (DTA), fractal dimension, dune geomorphology, Mars, Earth

CLC Number: