中纬度地磁暴期间热层垂直风响应机制的模拟

基于TIMEGCM模型，研究了2005年9月10日中纬度地磁暴期间热层（100~650 km）水平风场变化对垂直风的影响。通过连续性方程诊断分析了暴时引起垂直风场变化的机制，结果表明:250 km以上的垂直风场取决于水平风场的变化，而250 km以下的垂直风场由较高高度的垂直风拉动；在地磁暴初相开始时，经向风场相比纬向风场对暴时250 km以上的垂直风场影响更为显著，随着地磁扰动增强，纬向风场对垂直风场变化的贡献更大；温度场对地磁暴的响应遵循同样规律，扰动开始时，温度沿经线传播更快，经向风变化更大，扰动增强后，温度沿纬线传播更快，纬向风变化更大。 

Modeling Study on the Response of the Thermospheric Vertical Winds to Geomagnetic Storm at Middle Latitudes

Based on the simulation data of TIMEGCM, the influence of horizontal wind variations on middle-latitude vertical wind changes during the geomagnetic storms (100~650 km) on 10 September 2005 is studied. The model simulations were diagnostically analyzed, which is to investigate the causes of storm-time vertical wind changes. The results show that the vertical wind variations above 250 km depend on the changes of horizontal wind, and the vertical wind changes below 250 km are driven by the vertical wind at high altitudes. In the early initial phase of geomagnetic storms, the meridional winds have more significant influence on the vertical winds over 250 km than the zonal winds. As the storm evolves, the zonal winds contributed more to the changes of vertical wind. The responses of temperature variations to the geomagnetic storms are similar with horizontal wind changes. At the beginning of the initial phase, the temperature propagates faster along the longitude, and the meridional wind changes faster. As the storm evolves, the temperature propagates faster along the latitude, and the zonal wind changes faster.