All-Sky Imager Observations of the Latitudinal Extent and Zonal Motion of Magnetically Conjugate 630.0 nm Airglow Depletions
All-Sky Imager Observations of the Latitudinal Extent and Zonal Motion of Magnetically Conjugate 630.0 nm Airglow Depletions
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DOI：
10.3390/atmos11060642
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发表时间：
2020-06
期刊：
影响因子：
2.9
通讯作者：
C. Martinis;D. Hickey;J. Wroten;J. Baumgardner;R. Macinnis;C. Sullivan;S. Padilla
中科院分区：
文献类型：
--
作者：
C. Martinis;D. Hickey;J. Wroten;J. Baumgardner;R. Macinnis;C. Sullivan;S. Padilla
630.0 nm全天空成像数据用于探测与赤道扩展F相关的气辉损耗。位于低纬度和中纬度美洲区地磁共轭位置的成对成像仪提供了关于气辉损耗发生率和纬向运动的信息。气辉损耗被认为延伸到磁纬度高达25°。观察到一个不对称的扩展，北方的结构到达更高的纬度。通过跟踪气辉损耗的纬向运动，可以推断热层中的纬向等离子体漂移，并研究它们在两个半球的同时行为。利用南半球的El Leoncito和Mercedes成像仪以及Villa de Leyva和Arecibo的磁共轭成像仪进行的个案研究提供了一致的证据，证明南大西洋磁异常对低纬度和中纬度热层-电离层系统的动态和特征的影响。
630.0 nm all-sky imaging data are used to detect airglow depletions associated with equatorial spread F. Pairs of imagers located at geomagnetically conjugate locations in the American sector at low and mid-latitudes provide information on the occurrence rate and zonal motion of airglow depletions. Airglow depletions are seen extending to magnetic latitudes as high as 25°. An asymmetric extension is observed with structures in the northern hemisphere reaching higher latitudes. By tracking the zonal motion of airglow depletions, zonal plasma drifts in the thermosphere can be inferred and their simultaneous behavior in both hemispheres investigated. Case studies using El Leoncito and Mercedes imagers in the southern hemisphere, and the respective magnetically conjugate imagers at Villa de Leyva and Arecibo, provide consistent evidence of the influence of the South Atlantic Magnetic Anomaly on the dynamics and characteristics of the thermosphere–ionosphere system at low and mid-latitudes.