图9. 火星北极博勒拉峡谷拉长型沙丘(来源:NASA/JPL/UA)HiRISE SP_026626_2645_RED,中心点位置:322.56°E,84.20°N;箭头代表沙丘发育风向
Fig.9. Elongated dunes in Chasma Boreale (source: NASA/JPL/UA)HiRISE SP_026626_2645_RED,center point:322.56°E,84.20°N;Arrows represent the wind direction of dune development