Kilometer‐scale topographic roughness of Mercury: Correlation with geologic features and units
Kilometer‐scale topographic roughness of Mercury: Correlation with geologic features and units
复制标题
DOI：
10.1002/2014gl062162
复制
发表时间：
2014-12
影响因子：
5.2
通讯作者：
M. Kreslavsky;J. Head;G. Neumann;M. Zuber;David E. Smith
中科院分区：
文献类型：
--
作者：
M. Kreslavsky;J. Head;G. Neumann;M. Zuber;David E. Smith
我们目前的地形粗糙度的北方环极地区的水星公里尺度的地图。这些地图是从水星表面、空间环境、地球化学和测距（信使）使命上的水星激光高度计（MLA）仪器获得的距离剖面图中得出的。作为粗糙度的测量，我们使用了三个基线处的轮廓曲率的四分位距：0.7 km、2.8 km和11 km。这些地图提供了典型地形结构变化的概况。它们显示了一个光滑的北方平原和粗糙的，更严重的陨石坑地形之间的二分法。对粗糙度尺度依赖性的分析表明，水星上的风化层比月球上的厚约三倍。水星北方火山平原的粗糙度对比表明，歌德盆地和另一个未命名的隐形盆地内有一个较年轻的单位。这些新的数据允许行星际地形粗糙度的比较。
We present maps of the topographic roughness of the northern circumpolar area of Mercury at kilometer scales. The maps are derived from range profiles obtained by the Mercury Laser Altimeter (MLA) instrument onboard the MErcury Surface, Space ENvironment, Geochemistry, and Ranging (MESSENGER) mission. As measures of roughness, we used the interquartile range of profile curvature at three baselines: 0.7 km, 2.8 km, and 11 km. The maps provide a synoptic overview of variations of typical topographic textures. They show a dichotomy between the smooth northern plains and rougher, more heavily cratered terrains. Analysis of the scale dependence of roughness indicates that the regolith on Mercury is thicker than on the Moon by approximately a factor of three. Roughness contrasts within northern volcanic plains of Mercury indicate a younger unit inside Goethe basin and inside another unnamed stealth basin. These new data permit interplanetary comparisons of topographic roughness.