Investigation of numerical methods for prediction of the ionospheric disturbances with observations and numerical simulations

我们研究了极光能量输入和极地高层大气中起源于低层大气的大气波。还从雷达和激光雷达观测和数值模拟两方面研究了由此产生的电离层和热层变化。从雷达和激光雷达观测资料中，我们弄清了太阳活动从最小到最大周期内电离层和热层变化的一些特征。数值模拟表明，热层风和温度的增强取决于极冠/极光椭圆形的大小。此外，还进行了一些数值模拟，以再现由于低层大气波的传播而引起的电离层和热层的变化。

We have studied auroral energy inputs and atmopheric waves, which are originated in the lower atmosphere, in the polar upper atmosphere. The resultant ionospheric and thermospheric variations have been also investigated both from radar and lidar observations and numerical simulations. From the radar and lidar observations, we have clarified some characteristics of the ionospheric and thermospheric variations in the periods from the solar minimum to maximum. The numerical simulations have shown enhancements of the thermospheric wind and temperature depending on the polar cap/auroral oval size. In addition, some numerical simulations were performed to reproduce the ionospheric and thermospheric variations due to propagation of the atmospheric waves from the lower atmosphere.