火星风沙地貌研究进展
发布时间:2018-10-19 10:35
【摘要】:作为最活跃的地貌塑造外营力,风力作用在火星表面塑造了各种各样的地貌形态。对火星风沙活动及风沙地貌的认识是随着观测和探测技术的进步而逐渐明确的。火星沙丘在北极地区连绵成带状分布,在其他地区分布比较零散,且主要与撞击坑、河谷和山谷相伴分布。火星风沙地貌与地球上相应的地貌类型形态相似而规模更大,表明两个星球上塑造风沙地貌的动力系统具有一定的相似性。火星沙丘主要由玄武岩质(北极部分沙丘为石膏质)颗粒堆积而成,沉积物粒度比地球粗,主要是由中沙和粗纱组成。随着获取影像时空分辨率的提高和着陆器在火星近表面的观测,发现火星上部分区域的沙丘和沙波纹比较活跃。同地球一样,火星风沙地貌也可指示火星气候的变化。
[Abstract]:As the most active geomorphologic shaping force, wind force has shaped various geomorphologic forms on the surface of Mars. The understanding of the aeolian sand activity and the aeolian geomorphology of Mars is becoming clear with the progress of observation and exploration technology. Martian dunes are distributed in arctic regions and scattered in other regions, and are mainly accompanied by impact craters, valleys and valleys. The wind sand geomorphology of Mars is similar to that of the corresponding geomorphological types on the earth and the scale is larger, which indicates that the dynamic system of wind and sand geomorphology on the two planets is similar to that on the other two planets. Mars dune is mainly composed of basaltic (arctic part of dune is gypsum) particles, sediment granularity is thicker than the earth, mainly composed of medium sand and roving. With the improvement of the spatial and temporal resolution of the images and the observation of the lander on the near surface of Mars, it is found that sand dunes and sand ripples are active in some areas of Mars. Like Earth, the Martian aeolian landform can also indicate changes in the Martian climate.
【作者单位】: 中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室;太原师范学院地理科学学院;陕西师范大学旅游与环境学院;
【基金】:国家重大科学研究计划(2013CB956000) 国家自然科学基金项目(41130533,41171010)
【分类号】:P185.3
,
本文编号:2280877
[Abstract]:As the most active geomorphologic shaping force, wind force has shaped various geomorphologic forms on the surface of Mars. The understanding of the aeolian sand activity and the aeolian geomorphology of Mars is becoming clear with the progress of observation and exploration technology. Martian dunes are distributed in arctic regions and scattered in other regions, and are mainly accompanied by impact craters, valleys and valleys. The wind sand geomorphology of Mars is similar to that of the corresponding geomorphological types on the earth and the scale is larger, which indicates that the dynamic system of wind and sand geomorphology on the two planets is similar to that on the other two planets. Mars dune is mainly composed of basaltic (arctic part of dune is gypsum) particles, sediment granularity is thicker than the earth, mainly composed of medium sand and roving. With the improvement of the spatial and temporal resolution of the images and the observation of the lander on the near surface of Mars, it is found that sand dunes and sand ripples are active in some areas of Mars. Like Earth, the Martian aeolian landform can also indicate changes in the Martian climate.
【作者单位】: 中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室;太原师范学院地理科学学院;陕西师范大学旅游与环境学院;
【基金】:国家重大科学研究计划(2013CB956000) 国家自然科学基金项目(41130533,41171010)
【分类号】:P185.3
,
本文编号:2280877
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