摘要
本文用美国NCAR非相干散射雷达链的观测资料进行了两个事例分析。结果表明,在所选事例的中、弱磁扰期间,高低纬电离层间以动力耦合效应为主,即扰动电离层发电机的特征较明显。由于赤道电离层特性和赤道站雷达观测灵敏度较高,从而也观测到与扰动电场从高纬直接穿透过来相关的电动耦合现象。最后,对有关的物理过程进行了讨论。
Observations from NCAR Incoherent Scatter Radar Base are used for case study of the dynamic and electrodynamic coupling.The results show that during periods of weak and moderate magnetic disturbance of two cases,the dynamic coupling between high and middle-low latitudinal ionospheres,i.e.the effect of the ionospheric disturbance dynamo,is prominent.The effect of the electrodynamic coupling,which is connected with the penetration of high-latitude electric fields into low latitudes,is more significant in observations of Jicamarca than that of Arecibo.This probably is related to the feature of the equatorial ionosphere and due to the high sensitivity of the measurement.The physical processes concerned are discussed.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第5期512-520,共9页
Chinese Journal of Geophysics
基金
国家自然科学基金
关键词
电离层
耦合
非相干
散射雷达
Incoherent scatter radar
Dynamic and electrodynamic couplings
The ionospheric disturbance dynamo
Disturbed E-field
Drift velocity
