子午工程二期漠河大气风温金属成分激光雷达钙原子初步观测结果  

Preliminary results of Calcium atom analysis by the wind-temperature-metalconstituents LiDAR at Mohe middle-upper atmosphere for the Phase II of Chinese Meridian Project

作　　者：陈峰磊 荀宇畅 王泽龙 杜丽芳 郑浩然 陈志青 程学武 王积勤 吴方 杨国韬 Chen Fenglei;Xun Yuchang;Wang Zelong;Du Lifang;Zheng Haoran;Chen Zhiqing;Cheng Xuewu;Wang Jiqin;Wu Fang;Yang Guotao(School of Physics and Optoelectronic Engineering,Taiyuan University of Technology,Taiyuan 030024,China;State Key Laboratory of Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;School of Science,Jiangsu University of Science and Technology,Zhenjiang 212100,China;State Key Laboratory of Spectrum and Atomic and Molecular Physics,Institute of Precision Measurement Science and Technology Innovation,Chinese Academy of Sciences,Wuhan 430071,China)

机构地区：[1]太原理工大学物理与光电工程学院,太原030024 [2]中国科学院国家空间科学中心空间天气学国家重点实验室,北京100190 [3]江苏科技大学理学院,镇江212100 [4]中国科学院精密测量科学与技术创新研究院波谱与原子分子物理国家重点实验室,武汉430071

出　　处：《地球与行星物理论评（中英文）》2024年第1期131-137,共7页Reviews of Geophysics and Planetary Physics

基　　金：国家自然科学基金资助项目(42004134,41627804);空间天气学国家重点实验室开放课题。

摘　　要：子午工程二期漠河(122°E,53°N)大气风温金属成分激光雷达利用高空大气金属层共振荧光散射机制探测80~120 km区域的金属层成分,并将这些金属成分作为示踪物去研究中高层大气的各种复杂的化学和动力学过程.子午工程二期漠河钙原子激光雷达采用的时间分辨率为1.1 min,空间分辨率为30 m.在这种高时空分辨率下,仍然得到了高信噪比信号.通过对2023年1月钙原子数密度随时间和高度的演化过程进行分析,发现背景层钙原子峰值密度达到了33.55 cm−3左右,并且其突发层钙原子峰值密度可以达到约53.64 cm−3;在与延庆(116.0°E,40.5°N)钙原子数密度的比较研究中,我们发现延庆的钙原子数密度小于漠河的钙原子数密度;在与国外台站钙原子观测的比较研究中,我们发现漠河钙原子数密度和德国Kuhlungsborn(54°N,12°E)台站的钙原子数密度接近,比法国的Observatoire de Haute Provence(44°N,6°E)台站的钙原子数密度大.在2023年1月12日至14日,我们观测到了钙流星尾迹,并且流星尾迹往往出现在金属层峰值的附近.The Phase II of Chinese Meridian Project atmosphere wind-temperature-metal-constituents LiDAR at Mohe(122°E,53°N)station uses a resonance fluorescence scattering mechanism to detect the metal layer composition in the upper atmosphere at 80-120 km,and subsequently uses these metal components as tracers to study various complex chemical and kinetic processes in the middle and upper atmosphere.The time resolution of this LiDAR is 1.1 min and the spatial resolution is 30 m.With high spatial and temporal resolution,we obtained a high signal to noise ratio for Ca number density.Further,we analyzed the evolution of Ca number density with time and height in January 2023.We observed that the peak value of background and sporadic Ca number densities reached approximately 33.55 cm^(−3)and 53.64 cm^(−3),respectively.In comparison with that in Yanqing(116.0°E,40.5°N)station,the Ca number density in Mohe station was higher.Moreover,while examining the Ca observation studies conducted at foreign stations,we found that the Ca number density in Mohe was close to that of Kuhlungsborn station(54°N,12°E;Germany)and was higher than that of Observatoire de Haute Provence station(44°N,6E;France).Additionally,during January 12–14,2023,we observed calcium meteor trails,consistently appearing near the peak of the metal layer spectrum.

关 键 词：激光雷达 钙原子数密度 流星尾迹 

分 类 号：P356[天文地球—空间物理学]