First Lidar Profiling of Meteoric Ca+ Ion Transport From ∼80 to 300 km in the Midlatitude Nighttime Ionosphere
First Lidar Profiling of Meteoric Ca+ Ion Transport From ∼80 to 300 km in the Midlatitude Nighttime Ionosphere
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DOI：
10.1029/2022gl100537
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发表时间：
2022-09
影响因子：
5.2
通讯作者：
J. Jiao;X. Chu;Han Jin;Zelong Wang;Yuchang Xun;Lifang Du;Haorang Zheng;Fuju Wu;Jiyao Xu;W. Yuan;C. Yan;Jihong Wang;Guotao Yang
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文献类型：
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作者：
J. Jiao;X. Chu;Han Jin;Zelong Wang;Yuchang Xun;Lifang Du;Haorang Zheng;Fuju Wu;Jiyao Xu;W. Yuan;C. Yan;Jihong Wang;Guotao Yang
我们报告了地磁安静时间内中纬度夜间电离层300公里范围内金属Ca+离子激光雷达剖面的世界记录。2020年3月至2021年6月，利用基于光学参量振荡器的激光雷达在北京（40.42°N，116.02°E）上空进行了Ca+测量（1080 -300 km）。主要的Ca+层（80-100 km）持续整夜，高密度的零星Ca+层（100-120 km）经常出现在夏季。热层-电离层Ca+（TICa+）层（110-300 km）可能是通过Ca+从这些零星层中抬升而形成的。激光雷达观测捕获了TICA+层从开始到结束的完整演变，揭示了有趣的特征。同时电离层探测仪测量显示，强零星E层TICA+和扩展F发病前。中性风可以部分解释观测到的垂直运输，但需要增强电场来解释结果。这样的激光雷达观测为E和F区耦合和等离子体不均匀性提供了新的见解。
We report a world record of lidar profiling of metallic Ca+ ions up to 300 km in the midlatitude nighttime ionosphere during geomagnetic quiet time. Ca+ measurements (∼80–300 km) were made over Beijing (40.42°N, 116.02°E) with an Optical‐Parametric‐Oscillator‐based lidar from March 2020 through June 2021. Main Ca+ layers (80–100 km) persist through all nights, and high‐density sporadic Ca+ layers (∼100–120 km) frequently occur in summer. Thermosphere‐ionosphere Ca+ (TICa+) layers (∼110–300 km) are likely formed via Ca+ uplifting from these sporadic layers. The lidar observations capture the complete evolution of TICa+ layers from onset to ending, revealing intriguing features. Concurrent ionosonde measurements show strong sporadic E layers developed before TICa+ and spread F onset. Neutral winds can partially account for observed vertical transport but enhanced electric fields are required to explain the results. Such lidar observations promise new insights into E‐ and F‐region coupling and plasma inhomogeneities.