金星大气声波传播特性研究以及光学遥感  

An investigation on propagation characteristic of Venus atmospheric acoustic wave and optical remote sensing

作　　者：张莹 易忠[1] 任志鹏[2,3,4] 葛亚松[2,3,4] 彭吉龙 于钱[1] 刘业楠 院小雪[1] ZHANG Ying;YI Zhong;REN ZhiPeng;GE YaSong;PENG JiLong;YU Qian;LIU YeNan;YUAN XiaoXue(Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China;Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Science,University of the Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]北京卫星环境工程研究所,北京100094 [2]地球与行星物理重点实验室,中国科学院地质与地球物理研究所,北京100029 [3]中国科学院地球科学研究院,北京100029 [4]中国科学院大学地球与行星科学学院,北京100049

出　　处：《地球物理学报》2022年第7期2421-2431,共11页Chinese Journal of Geophysics

基　　金：国家自然科学基金委项目(41704170);中国科学院地球与行星物理重点实验室开放课题(DQXX2021-10)资助。

摘　　要：行星地震能够在大气中激发声波,该波动携带地震信息在大气中上传,可以作为行星地震监测研究的示踪目标.本文研究了不同频率的声波,在金星背景大气条件下的上传特征.通过计算大气密度分布、大气黏滞性和热传导效应引起的声波振幅变化,得到不同频率声波的振幅高度剖面.研究发现低频声波能够上传到较高高度,且振幅出现显著放大.根据振幅的高度分布以及金星光学辐射特征可以得到,通过光学遥感的方式探测金星声波扰动时,所选波段对应的辐射高度应为90 km附近及以上,并据此筛选了探测的可用频段.该研究结果为金星地质活动光学遥感探测的参数选择提供了参考.Planetary seismic activity can generate acoustic waves which propagate upward in the atmosphere and carry seismic information.These waves can be regarded as tracking targets for planetary seismic activity monitoring and research.This work studies the propagation characteristic of acoustic wave with different frequencies in the Venus background atmosphere.By calculating the amplitude variations caused by atmospheric density distribution,atmospheric viscosity and heat conduction,we obtain the vertical amplitude profiles of different frequency acoustic waves.It is found that low-frequency acoustic waves can propagate higher,and the amplitude is significantly amplified.With combining consideration of amplitude height distribution and optical radiation characteristic of Venus,it is concluded that the radiation height should be around 90 km or more for optical remote sensing of acoustic waves.The eligible bands are proposed accordingly.The results provide a reference for parameter selection of Venus seismic activity optical remote sensing.

关 键 词：金星大气 声波 衰减特征 光学遥感 

分 类 号：P407[天文地球—大气科学及气象学]