Antarctic and Conjugate Research using SuperDARN

超级双极光雷达网络（superdamn）由高频雷达组成，可以观测地球电离层的远距离，其特征和不规则性，并监测其动态。电离层是高层大气中的一个电离层（在~110公里高度以上），在那里电流可以响应地球磁层和地球附近（地球空间）的太阳风等离子体流之间的耦合而流动。许多地球空间现象是由太阳耀斑和日冕物质抛射引起的，它们的影响传播到电离层，这种影响在两极地区尤为强烈。电离层等离子体对流（携带电离层电流）在地磁风暴期间变得强大，当它作为一个整体在两极帽上从白天一侧移动到夜晚一侧，然后通过各自的极光带返回到白天一侧。两极电离层也通过地球磁力线在共轭点上电连接。电离层连接在磁层顶和两极之间的电流和电场传输中起着非常重要的作用，但对这些过程的研究还不够充分。超级雷达的大型网络已经在北极和南极地区定期观测电离层对流。利用这些雷达数据研究了电离层对流对太阳风和行星际磁场变化的响应、中央极帽对流与尖峰区和午夜区对流的关系以及磁层-电离层耦合系统的状态。美国国家科学基金会资助的位于麦克默多和南极的南极超级雷达有助于研究太阳风中观测到的波浪结构与极地帽中各自响应之间的关系，等离子体密度结构的运动，离子中性耦合和热层风。这项研究工作将继续发展nsf资助的雷达，帮助解决地球空间研究中尚未彻底研究的基本问题。

The Super Dual Auroral Radar Network (SuperDARN) is composed of high-frequency radars that can observe far reaches of the Earth's ionosphere, its features and irregularities, and monitor its dynamics. The ionosphere is an ionized layer in the upper atmosphere (at and above ~110-km altitude) where electrical currents can flow in response to the coupling between the Earth's magnetosphere and solar wind plasma flow in the Earth's neighborhood (geospace). Many geospace phenomena are caused by solar flares and coronal mass ejections that have their effects transmitted to ionospheric layers, which are especially strong in the polar regions. The ionospheric plasma convection (that carries ionospheric currents) becomes strong during geomagnetic storms when it moves as a whole over both polar caps from dayside to nightside and then returns to the dayside via respective auroral zones. Polar ionospheres are also electrically connected via the Earth's magnetic field lines in conjugate points. The ionospheric connection plays a very important role in transporting currents and electric fields between the magnetopause and both polar regions, but these processes are still insufficiently studied. The large network of SuperDARN radars already observe ionospheric convection in the northern and southern polar regions on a regular basis. Data from these radars are used to study responses of ionospheric convection to solar wind and interplanetary magnetic field changes, the relation of central polar cap convection to that of the cusp and midnight regions, and to the state of the coupled magnetosphere-ionosphere system. The NSF-funded Antarctic SuperDARN radars at McMurdo and South Pole contribute to the studies such as relationships between wave structures observed in the solar wind and respective responses in the polar caps, motion of plasma density structures, ion-neutral coupling, and thermospheric winds. This research effort will continue developing the NSF-funded radars, help addressing fundamental questions of the Geospace research that have not yet thoroughly examined.