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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Coherent and incoherent scatter radar study of the climatology and day-to-day variability ofmean F region vertical drifts and equatorial spread F
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Coherent and incoherent scatter radar study of the climatology and day-to-day variability ofmean F region vertical drifts and equatorial spread F

机译：相干和非相干散射雷达的研究气候学和日常可变性ofmean F地区垂直漂移和赤道扩展F

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摘要

We conducted a comprehensive analysis of the vertical drifts and equatorial spread F (ESF) measurements made by the Jicamarca incoherent scatter radar (ISR) between 1994 and 2013. The ISR measurements allowed us to construct not only updated climatological curves of quiet-time vertical plasma drifts but also time-versus-height maps of ESF occurrence over the past two solar cycles. These curves and maps allowed us to better relate the observed ESF occurrence patterns to features in the vertical drift curves than previously possible. We identified an excessively high occurrence of post-midnight F region irregularities during December solstice and low solar flux conditions. More importantly, we also found a high occurrence of ESF events during sudden stratospheric warming (SSW) events. We also proposed and evaluated metrics of evening enhancement of the vertical drifts and ESF occurrence, which allowed us to quantify the relationship between evening drifts and ESF development. Based on a day-to-day analysis of these metrics, we offer estimates of the minimum pre-reversal enhancement (PRE) peak (and mean PRE) values observed prior to ESF development for different solar flux and seasonal conditions. We also found that ESF irregularities can reach the altitudes at least as high as 800 km at the magnetic equator even during low solar flux conditions.
机译：我们进行了全面的分析垂直漂移和赤道扩展F(养)测量由Jicamarca语无伦次1994年和2013年之间的散射雷达(ISR)。ISR测量不仅让我们来构造安静的时间更新气候曲线垂直的等离子体漂移也time-versus-height养的地图出现过去的两个太阳周期。让我们更好的与观察到的养发生在垂直模式特性比以前漂移曲线。确定一个过高的发生午夜之后F地区期间违规行为冬至和低太阳能通量条件。更重要的是,我们也发现了大量发生养事件期间突然平流层变暖(f)事件。度量的晚上增强垂直的允许我们养漂移和发生之间的关系量化晚上飘养和发展。分析这些指标,我们提供的估计最低pre-reversal增强峰值(前)(意味着PRE)值观察养之前发展不同的太阳能通量和季节性条件。至少能达到海拔高达800公里在磁赤道即使在低的太阳能通量条件。

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