极地研究

极地研究 ›› 2026, Vol. 38 ›› Issue (2): 275-288.DOI: 10.13679/j.jdyj.20250084

• 研究论文 • 上一篇    下一篇

基于SuperDARN雷达的电离层对流晨昏不对称性研究

高冰洁1, 刘二小1, 陈轩1, 胡泽骏2,3,4, 王子磊1, 刘俊良1   

  1. 1杭州电子科技大学通信工程学院, 浙江 杭州 310018;
    2中国极地研究中心(中国极地研究所), 极区空间物理与天文研究所, 上海 200136;
    3北极黄河地球系统国家野外科学观测研究站, 中国极地研究中心(中国极地研究所), 上海 201209;
    4南极中山雪冰和空间特殊环境与灾害国家野外科学观测研究站, 中国极地研究中心(中国极地研究所), 上海 201209
  • 收稿日期:2025-12-04 修回日期:2026-02-12 出版日期:2026-06-30 发布日期:2026-07-13
  • 通讯作者: 刘二小

Research on ionospheric convection dawn-dusk asymmetry based on SuperDARN

GAO Bingjie1, LIU Erxiao1, CHEN Xuan1, HU Zejun 2,3,4, WANG Zilei1, LIU Junliang1   

  1. 1School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;
    2Center for Space Physics and Astronomy, Polar Research Institute of China, Shanghai 200136, China;
    3Arctic Yellow River Earth System National Observation and Research Station, Polar Research Institute of China, Shanghai 201209, China;
    4Antarctic Zhongshan Ice and Space Environment National Observation and Research Station, Polar Research Institute of China, Shanghai 201209, China
  • Received:2025-12-04 Revised:2026-02-12 Online:2026-06-30 Published:2026-07-13

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摘要：

基于2024年超级双子极光雷达网(Super Dual Auroral Radar Network , SuperDARN)探测的电离层对流数据, 本文对行星际磁场(Interplanetary Magnetic Field , IMF)三分量(Bx、By、Bz)、太阳风速度(Vx)、动压(Pd)与地磁活动指数(AE)在不同IMF Bz极性(北向/南向)条件下对电离层对流形态与强度的影响进行分析。选取了涡间连线斜率(Ks)、越极盖电势(Cross Polar Cap Potential, CPCP)与涡间距作为电离层对流表征参量, 分析了其与6个近地空间参数(Bx、By、Bz、Vx、Pd和AE)的相关性, 以此来评估6个近地空间参数对晨昏不对称性和对流强度的影响。研究结果表明, 在北向Bz条件下, 太阳风-磁层-电离层整体耦合较弱, 3个表征量对驱动参数的线性响应微弱, 电离层对流表现出较大的随机性与结构复杂性; 在南向Bz条件下, 耦合增强, Bz对CPCP和涡间距的变化起主导作用; By是控制晨昏不对称性的主要因子; Bx对晨昏不对称性有一定的调制效应; 同时, AE的增强通常会导致CPCP增强与涡间距增大(AE与CPCP及涡间距存在同步变化), 而Vx和Pd与3个电离层对流表征量呈弱相关。本文为进一步研究太阳风-磁层-电离层耦合的电离层对流不对称性研究提供一定的参考。


关键词: SuperDARN雷达, 电离层对流模式, 晨昏不对称性

Abstract:

Based on ionospheric convection data measured by the Super Dual Auroral Radar Network (SuperDARN) in 2024, we analyze the effects of the Interplanetary Magnetic Field (IMF) components (Bx, By, Bz), solar wind velocity (Vx), dynamic pressure (Pd), and geomagnetic activity index AE on the morphology and intensity of ionospheric convection under northward and southward IMF Bz conditions. The slope of the inter-vortex line (Ks), Cross Polar Cap Potential (CPCP), and vortex spacing are selected as characteristic indices of ionospheric convection. We analyze their correlations with the six near-Earth space parameters (Bx, By, Bz, Vx, Pd, AE) to evaluate the influence of these near-Earth space parameters on dawn-dusk asymmetry and convection intensity. The results indicate that, under northward IMF conditions, the overall coupling is weak. The linear response of the three characteristic indices to driving parameters is weak, and ionospheric convection exhibits considerable randomness and structural complexity. Under southward IMF conditions, the coupling is enhanced. Bz plays a dominant role in variations of CPCP and vortex spacing. By is the primary factor controlling dawn–dusk asymmetry, and Bx has a modulating effect on that asymmetry. Meanwhile, higher AE typically leads to increasing CPCP and larger vortex spacing (AE varies synchronously with both CPCP and vortex spacing), while Vx and Pd show weak linear correlations with the three characteristic indices. This study provides a reference for further research on the dawn–dusk asymmetry of ionospheric convection in solar wind-magnetosphere-ionosphere coupling.


Key words: SuperDARN, ionospheric convection pattern, dawn-dusk asymmetry