A comprehensive statistical study is conducted on O⁺ and H⁺ outflows obtained from the TEAMS/FAST data during the 23rd solar cycle (1996–2007). The study investigates interhemispheric asymmetry in ionospheric outflows during local summer, winter, and equinox seasons. Data are classified into two distinct periods: the pre-storm and geomagnetic storm phases. Numerous statistical asymmetries are identified. The findings indicate that the dayside cusp consistently demonstrates more outflow rates of O⁺ and H⁺ in the northern hemisphere than southern hemisphere during geomagnetic storms in all seasons as well as during the pre-storm period in the summer season with the exception of H⁺ during summer storms. Conversely, the nightside O⁺ and H⁺ outflow rates are higher in the southern hemisphere during pre-storm and storm periods in the summer season. Additionally, the dawnside and duskside outflow rates of O⁺ and H⁺ are predominantly stronger in the southern hemisphere.

中文翻译：

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季节性电离层流出的半球不对称


对第 23 个太阳周期（1996-2007 年）期间 TEAMS/FAST 数据获得的 O ⁺ 和 H ⁺ 流出量进行了全面的统计研究。该研究调查了当地夏季、冬季和春分季节电离层流出的半球间不对称性。数据分为两个不同的时期：风暴前阶段和地磁风暴阶段。发现了许多统计不对称现象。研究结果表明，在所有季节的地磁暴期间以及前期，北半球的日侧尖点始终表现出比南半球更多的 O ⁺ 和 H ⁺ 流出率。夏季风暴期，夏季风暴期间的 H ⁺ 除外。相反，在夏季风暴前和风暴期间，南半球的夜面 O ⁺ 和 H ⁺ 流出率较高。此外，O ⁺ 和 H ⁺ 的黎明侧和黄昏侧流出速率在南半球主要较强。