中低纬电离层对行星际磁场南向翻转的响应

利用卫星和地面台站的历史数据,研究了中低纬电离层,foF2对强行星际磁场南向翻转的响应.结果表明,行星际磁场南向翻转能引起电离层扰动式响应,响应特性与纬度、季节和翻转时刻的地方时有关.在中纬,发生在夏分季和夜间的翻转能造成较强的电离层负响应,其幅度随纬度的降低而变弱,在恢复过程中存在不规则振荡;在低纬,南向翻转引起的电离层响应在夏分季较强,在冬季则较弱,且易被淹没在电离层自身的扰动中.分析指出电离层最大负响应与翻转后南向磁场极大值之间有着较好的线性关系.

Ionospheric Responses to IMF Southward Turnings in Mid- and Low-latitudes

Using the historical data from ionosonde stations and satellite,the response of ionospheric f_0F_2 to major Interplanetary Magnetic Field(IMF) southward turnings in mid- and lowlatitudes is studied.It shows that the IMF southward turnings can cause disturbing response in the ionosphere,which depends on latitude,season and local time when the turning occurs.In midlatitude, the ionospheric response to southward turnings in summer and equinox and by night is stronger,which fades out with latitude decreases.Dur...