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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Investigating the relationships among the South Alantic Magetic anomaly, southern nighttime midlatitude trough, and nighttime Weddell Sea Anomaly during southern summer
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Investigating the relationships among the South Alantic Magetic anomaly, southern nighttime midlatitude trough, and nighttime Weddell Sea Anomaly during southern summer

机译：调查之间的关系Alantic Magetic异常,南部夜间中间纬度槽,夜间威德尔海南部夏季异常

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This study utilized the multi-instrument data of the Defense Meteorological Satellite Program to investigate the evening/nighttime topside ionosphere during the 1996/1997 southern summer. A series of regional surface maps were constructed and permitted the tracking of the topside ionosphere's plasma density features, plasma composition, thermal structures, and vertical and horizontal plasma flows. These maps tracked a complete nighttime Weddell Sea Anomaly (WSA) and strong horizontal plasma flows that registered the high-conductivity regions of the South Atlantic Magnetic Anomaly (SAMA). These regions developed over the southeastern Pacific, just equatorward of the WSA, and over the South Atlantic. A heavy-ion stagnation trough developed poleward of the SAMA affected regions. Thus, the trough appeared on the WSA's equatorward side. During periods of increasing magnetic activity, the plasmapause was the WSA's poleward boundary. A statistical study modeled the trough's magnetic activity dependence and revealed a strong east-west hemispherical difference that was due to the SAMA effects. When the AE6 was 0 nT, the trough appeared at (57.49 ± 2.82)°S (geomagnetic) over the southwestern hemisphere. Owing to the SAMA's special electrodynamic effects, the trough developed at lower latitudes, (42.39 ± 3.04)°S, over the southeastern hemisphere. Meanwhile, the plasmapause occurred at ～(62.5 ± 4)°S, and the WSA's peak appeared at ～(56.2 ± 4)°S. Hence, there was a ～20° (lat) separation between the trough and the plasmapause over the southeastern hemisphere. Between 210°E and 330°E (geographic), the WSA filled this gap. With increasing magnetic activity, the trough in the SAMA affected regions moved poleward at a rate of (0.0157 ± 0.004)°S/nT. Elsewhere, it had a (0.0196 ± 0.002)°S/nT equatorward movement.
机译：本研究利用multi-instrument数据国防气象卫星计划晚上/夜间上部进行调查电离层在1996/1997南方的夏天。一系列的区域表面地图构造和允许的跟踪上部电离层等离子体密度的特性,等离子体组成、热结构,和垂直和水平等离子体流。跟踪一个完整的夜间威德尔海异常(WSA)和强大的水平的等离子体流注册的高导电率的地区南大西洋磁异常(央行)。太平洋东南部发达地区,朝赤道方向的WSA,在南方大西洋。向极影响央行的地区。低谷出现在WSA的阻碍。在增加磁场活动时期,等离子体层顶是世界钢铁协会向南极的边界。一个槽的磁场建模的统计研究活动依赖和显示一个强大由于东西半球的差异央行的效果。低谷出现在(57.49±2.82)°S(地磁)在西南部的半球。央行的特殊电动效应,槽在低纬度地区,开发(42.39±3.04)°年代,在东南部半球。等离子体层顶发生在~(62.5±4)°S,和WSA的峰值出现在~(56.2±4)°S。有一个~ 20°(lat)之间的分离槽和等离子体层顶在东南部半球。世界钢铁协会填补这个空白。活动,央行的槽区域的影响移动的速度向极(0.0157±0.004)°S / nT。0.002)°S / nT朝赤道方向运动。

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