金星风沙地貌研究进展

Progresess in the research of Venusian aeolian landforms

金星是类地行星,被称为地球的"姊妹星",已发现其上有风沙地貌存在。理论模型分析及风洞实验研究均证明,金星具备风沙地貌的形成条件,风力作用是塑造金星地貌形态的重要外营力。金星表面环境下的风洞模拟实验生成了不同类型的风沙床面形态。对探测器返回的金星影像分析表明,金星风沙地貌主要包括沙丘和雅丹,没有明确的证据表明风棱石的存在。在无法获取高分辨率影像的情况下,对金星风沙地貌的深入研究主要依靠理论模型与风洞实验研究。此外,基于地球风沙地貌的类比研究,也成为金星风沙地貌研究的一种重要手段。

Venus is a terrestrial planet,which is called the sister planet of the Earth,and have been found the aeolian landforms existing on the surface of the planet. It indicates that wind is an important exogenic process sculptured the surface landforms of Venus. Both theoretical models and wind tunnel experiments demonstrate that Venus meets the conditions for aeolian landform formation. The wind tunnel experiments under Venusian conditions mimic the formation of various types of aeolian bedforms. The images sent back by Magellan indicate that there are mainly two kinds of aeolian landforms,namely dune and yardang. There is no direct evidence to show the existence of ventifact. Since unable to obtain high- resolution images of Venus,the in- depth study of Venusian aeolian geomorphology is mainly rely on theoretical models and wind tunnel experiments. Moreover,analogue investigation based on terrestrial aeolian geomorphology will be another important means to the research of Venusian aeolian geomorphology.