Solar energy input from the earth's magnetosphere to its atmosphere

太阳和地球等离子体环境之间的相互作用是非常动态的，并且具有社会和商业重要性。来自这个太瓦系统的大部分能量通过MHD波从外磁层向内转移，MHD波沿着沿着磁场线传播并进入高层大气（电离层），在那里能量被耗散。通过这项研究，我将能够衡量地磁活动对地球环境的影响。“空间气象”危害现已列入政府的国家风险登记册，因为众所周知地磁暴会影响地面和空间的人类活动。最近，还变得明显的是，高层大气中的非线性效应也可能影响对流层气候，包括高能粒子降水（Epp，与MHD波相关）对平流层臭氧的影响（例如Seppala等人，莱斯特大学的无线电和空间等离子体物理学小组在联合王国拥有获得若干重要数据集的独特途径，包括地面磁力计（通过SuperMag）、电离层雷达（包括EISCAT和SuperDARN）和卫星（例如货车艾伦探测器，VAP）。该项目将利用这些设施来探索通过MHD波在高层大气中的能量沉积。收集到的数据将为低层大气的MHD波生成和太阳强迫的最新模型提供输入。

The interaction between the Sun's and the Earth's plasma environments is very dynamic and one of societal and commercial importance. A large proportion of the energy from this terawatt system is transferred from the outer magnetosphere inwards by MHD waves, which propagate along magnetic filed lines and into the upper atmosphere (ionosphere), where the energy is dissipated. By undertaking this study, I will be able to gauge the impact of geomagnetic activity on the Earth's environment. "Space Weather" hazards are now part of the Government's National Risk Register since geomagnetic storms are known to affect human activities on the ground and in space. Recently, it has also become apparent that nonlinear effects in the upper atmospheric may also influence tropospheric climate, including energetic particle precipitation (Epp, associated with MHD waves) effects on stratospheric ozone (e.g. Seppala et al., 2009) and changes to the geoelectric circuit The Radio and Space Plasma Physics (RSPP) group at the University of Leicester have unique UK access to a number of important data sets including ground magnetometers (through SuperMag), ionospheric radars (including EISCAT and SuperDARN) and satellites (e.g.the Van Allen Probes, VAPs). This project will exploit these facilities to explore energy deposition in the upper atmosphere via MHD waves. The data collected will provide input to up-to-date models of MHD wave generation and solar forcing of the lower atmosphere.