A statistical study on the correlation between sporadic Ca+layer and Es in Beijing(40.5°N,116°E)OAEI
A statistical study on the correlation between sporadic Ca+layer and Es in Beijing(40.5°N,116°E)
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)fora 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 of 82.25％.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.
YuChang Xun;ZhiShan Chen;LiFang Du;HaoRan Zheng;Jing Jiao;ZeLong Wang;ShaoHua Gong;GuoTao Yang
College of Physics,College of Electronic Information and Optical Engineering,Taiyuan University of Technology,Taiyuan 030024,China||State Key Laboratory of Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,ChinaState Key Laboratory of Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,ChinaSchool of Science,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212100,ChinaSchool of Physics and Electronics Engineering,Hainan Normal University,Haikou 571158,China
the Meridian Projectlidarsporadic Ca+layersporadic E layer
《地球与行星物理（英文）》 2024 (005)
753-761 / 9
The authors are grateful to the Chinese Meridian Project for providing the equipment and data.The authors thank all reviewers and editors for their constructive review of this manuscript.This research was supported by the National Natural Science Founda-tion 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)and Chinese Academy of Sciences(YSBR-018).
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