Oceans in the past history of Mars: Tests for their presence using Mars Orbiter Laser Altimeter (MOLA) data
Oceans in the past history of Mars: Tests for their presence using Mars Orbiter Laser Altimeter (MOLA) data
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火星过去历史中的海洋：使用火星轨道器激光高度计 (MOLA) 数据测试它们的存在
DOI：
10.1029/1998gl900116
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发表时间：
1998
影响因子：
5.2
通讯作者：
M. Zuber
中科院分区：
文献类型：
--
作者：
J. Head;M. Kreslavsky;H. Hiesinger;M. Ivanov;S. Pratt;N. Seibert;David E. Smith;M. Zuber
有人提出火星上有一个古老的北极海洋[Parker等人，1989]，我们使用MOLA数据来验证这一假设。在两个提议的触点/海岸线中，较年轻的触点2显示出最接近等势面；该表面的垂直变化发生在接触地层后地质活动或等势面（如塔尔西斯）位置随时间变化的地区。“接触2号”下的火星表面在所有尺度上都比上面光滑。接触2下方区域的体积（~ 1.5×107 km³）介于估算的最小流出通道总流量和估算的最大巨粒砾岩孔隙空间之间。这些结果与之前的假设一致，即在火星过去的历史中，北部低地曾被大量的水占据。
An ancient north polar ocean on Mars has been proposed [Parker et al., 1989] and we use MOLA data to test the hypothesis. Of the two proposed contacts/shorelines, the younger Contact 2 shows the closest approximation to an equipotential surface; vertical variations along this surface occur in areas with post‐contact‐formation geological activity or suspected changes in the position of an equipotential surface (e.g., Tharsis) with time. The surface of Mars is smoother at all scales below Contact 2 than above. The volume of the region below Contact 2 (∼1.5×107 km³) is between the minimum estimated total outflow channel discharge and the maximum estimated megaregolith pore space. These results are consistent with the hypothesis that a large standing body of water occupied the northern lowlands in the past history of Mars.