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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Density-Temperature Synchrony in the Hydrostatic Thermosphere
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Density-Temperature Synchrony in the Hydrostatic Thermosphere

机译：在静水密度温度同步热大气层

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The paper presents a detailed analysis of the density-temperature (ρ-T) synchrony in the thermosphere using a hydrostatic general circulation model. The numerical models in general offer not only great potential for forecasting the transient response of the thermosphere but also are excellent tools for understanding the driving mechanisms of various thermospheric trends and features. This study investigates and isolates the dependency of the ρ-T synchrony on the season, altitude, space weather, high-latitude electrodynamics, and the lower atmospheric tidal spectrum. The results demonstrate that the previously reported ρ-T synchrony begins around 300-km (350-km) altitude at the equator (high latitudes). The effect of the lower atmospheric tidal spectrum on the ρ-T synchrony patterns seems to be only marginal and more noticeable during the equinox months. The study demonstrates that the ρ-T phase lag is larger in the high latitudes of the summer hemisphere and evolves through the day and is attributable to ion drag and temperature fluctuations via soft particle precipitation. The study provides physical insights into how the winds contribute to the ρ-T synchrony. In addition, the results show that geomagnetic activity contributes significantly to the ρ-T synchrony; the underlying mechanism may be related to temperature enhancements in the high latitudes via Joule heating and associated nonlinear interactions. While the ρ-T phase lags attributable to different solar activity levels are modest, the solar heating is the primary source that maintains the ρ-T synchrony in the low/middle latitudes via upward propagating thermal tides.
机译：提出了一个详细的分析密度温度(ρ- t)的同步使用水压一般热大气层循环模型。一般报价不仅潜力巨大预测的瞬态响应热电离层也是优秀的工具理解不同的驱动机制thermospheric趋势和特征。调查和隔离的依赖ρ- t同步的季节、海拔高度、空间天气,高纬度地区电动力学,降低大气潮汐谱。证明之前报道ρ- t同步开始约300公里(350公里)的高度在赤道(高纬度地区)。降低大气潮汐谱ρ- t似乎只有边际和同步模式在春分月更加明显。研究表明,ρ- t相位滞后大夏天的高纬度地区通过天,半球和发展由于离子拖动和温度通过软粒子降水波动。研究提供了物理深入了解风为ρ- t同步。此外,结果表明,地磁活动ρ- t的一个重要原因同步;在高温度增强有关通过电阻加热和相关纬度非线性相互作用。由于不同太阳活动水平谦虚,是太阳能加热是主要的吗维护ρ- t同步的来源通过向上传播低/中纬度地区热的潮汐。

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