A statistical study on the correlation between sporadic Ca+layer and Es in Beijing(40.5°N,116°E)  

作　　者：YuChang Xun ZhiShan Chen LiFang Du HaoRan Zheng Jing Jiao ZeLong Wang ShaoHua Gong GuoTao Yang 

机构地区：[1]College of Physics,College of Electronic Information and Optical Engineering,Taiyuan University of Technology,Taiyuan 030024,China [2]State Key Laboratory of Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China [3]School of Science,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212100,China [4]School of Physics and Electronics Engineering,Hainan Normal University,Haikou 571158,China

出　　处：《Earth and Planetary Physics》2024年第5期753-761,共9页地球与行星物理（英文版）

基　　金：supported by the National Natural Science Foundation of China(42004134,42374204,41627804);Fundamental Research Program of Shanxi Province(202303021221051);State Key Laboratory of Space Weather,Scientific Projects of Hainan Province(ZDYF2021GXJS040);the Innovational Fund for Scientific and Technological Personnel of Hainan Province(KJRC2023C05);Chinese Academy of Sciences(YSBR-018)。

摘　　要：From April 2020 to June 2022,a Ca+lidar with dual-wavelength and narrow-band emitting lasers utilizing all-solid-state technology was employed to conduct observations in Beijing(40.41°N,116.01°E)for a total duration of 1797.79 hours over 280 nights.A total of 286 sporadic Ca+layers were observed,with heights ranging from 88 to 120 km and densities varying from 5.33 to 2200 cm^(-3).We simultaneously observed the ionosonde,located 28 km from the lidar,and found a correlation of 61.89%between the sporadic Ca+layer and the sporadic E layer.When the sporadic Ca+layer has a downward phase trend,there is a correlation of 76.84%.By excluding the influence of ionosonde sensitivity,we focus only on calcium ions that have a density exceeding 140 cm^(-3),which exhibit a correlation of82.25%.Above 100 km,the correlation significantly increases,reaching approximately 90%.Furthermore,the correlation between the sporadic Ca+layer and the sporadic E layer is particularly noticeable during the summer season,reaching around 90%.This phenomenon can be attributed to the variations in metal ions that occur during different seasons.

关 键 词：LAYER LIDAR EXCEEDING 

分 类 号：P111[天文地球—天文学]