论文标题
使用Supermag地面磁力计数据
Directed Network of Substorms Using SuperMAG Ground-Based Magnetometer Data
论文作者
论文摘要
我们利用超级100+磁力计量化了离子层电流系统的时空演化。我们首次从该数据中构造了动态定向网络。如果在两个磁力计站观察到的向量磁场扰动之间的规范互相关超过阈值，它们会形成网络连接。规范互相关的时间滞后是最大的确定网络连接捕获的结构的传播或扩展的方向。如果空间相关性反映了电离层电流模式，则网络性能可以测试不断发展的实量电流系统的不同模型。我们根据夜间地面站覆盖范围选择86个孤立的近代型。我们找到并获得了一致的图片，并获得了经典的构造当前楔形的一致图片。在接近电流楔向西扩展之后，可以看到当前的系统。后来，向东扩张的信号较弱。最后，有证据表明对流实体增强。
We quantify the spatiotemporal evolution of the substorm ionospheric current system utilizing the SuperMAG 100+ magnetometers.We construct dynamical directed networks from this data for the first time. If the canonical cross-correlation between vector magnetic field perturbations observed at two magnetometer stations exceeds a threshold, they form a network connection. The time lag at which canonical cross-correlation is maximal determines the direction of propagation or expansion of the structure captured by the network connection. If spatial correlation reflects ionospheric current patterns, network properties can test different models for the evolving substorm current system.We select 86 isolated substorms based on nightside ground station coverage. We find, and obtain the timings for, a consistent picture in which the classic substorm current wedge forms. A current system is seen premidnight following the substorm current wedge westward expansion. Later, there is a weaker signal of eastward expansion. Finally, there is evidence of substorm-enhanced convection.
