【摘要】 本文通过统计分析方法，研究了2000年至2017年间由行星际日冕物质抛射(ICME)引发的磁暴与中低纬度电离层总电子含量(TEC)暴之间的关系。研究数据涵盖了56个ICME事件及其对应的电离层TEC扰动数据。结果表明，在ICME期间，68%的SB型事件中，TEC扰动先于地磁暴发生，磁暴条件下电离层TEC暴的超前效应显著，且中纬度地区的超前效应强于低纬度地区。具体而言，电离层正暴的持续时间与纬度和磁暴类型密切相关，而电离层负暴的持续时间主要受纬度影响，与磁暴类型无关。此外，电离层正负双相暴和负正双相暴的持续时间与纬度和磁暴类型均无显著关联。进一步分析表明，南北半球相同类型磁暴下电离层暴的持续时间在纬度上存在不对称性。例如，在SB型磁暴期间，中低纬度电离层正暴的持续时间在40°N、50°N、60°N纬度主要为0—12小时，而在10°S、0°、10°N、20°N、30°N纬度则以0—12小时与48—96小时为主。这些发现为理解日地能量耦合机制提供了新的视角，并为电离层暴的预测和监测提供了理论依据。更多还原

【Abstract】 This study investigates the relationship between geomagnetic storms and ionospheric total electron content(TEC) disturbances during interplanetary coronal mass ejections(ICME) events from 2000 to2017.The research employed statistical analysis methods to examine data from 56 ICME events and their corresponding ionospheric TEC disturbances.The results reveal that TEC disturbances preceded geomagnetic storms in 68% of SB-type events,particularly in mid-latitude regions compared to low-latitude regions.Specifically,the duration of positive ionospheric TEC disturbances is significantly related to latitude and the type of geomagnetic storm.In contrast,the duration of negative ionospheric TEC disturbances is primarily influenced by latitude and is independent of the geomagnetic storm type.Notably,the duration of both positive-negative and negative-positive ionospheric TEC disturbance is not significantly related to latitude or the type of geomagnetic storm.Furthermore,the study identifies an asymmetry in the duration of ionospheric TEC disturbance under the same type of geomagnetic storm in the Northern and Southern Hemispheres with respect to latitude.For instance,during SB-type geomagnetic storms,the duration of positive ionospheric TEC disturbance at mid-latitudes(40°N,50°N,60°N) is mainly 0-12 hours,while at low-latitudes(10°S,0°,10°N,20°N,30°N) it ranges from 0-12 hours to 48-96 hours.These results provide valuable insights into the SunEarth energy coupling mechanism and offer a theoretical basis for the prediction and monitoring of iono spheric TEC disturbance,enhancing our understanding of the complex interactions between geomagnetic storms and ionospheric TEC disturbances.更多还原