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日全食期间武汉钠层和电离层联合观测结果

DOI: 10.1007/s11430-015-5126-2, PP. 1569-1574

Keywords: 日全食,激光雷达,钠层,电离层,TEC

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Abstract:

?利用全天时钠层荧光激光雷达和GPS电离层探测仪,在2009年7月22日武汉日全食期间,开展钠层与电离层的联合观测试验.观测结果表明,钠层密度半高全宽在日全食过程中稍有变窄,而日全食过后增宽,钠层峰值高度在日全食过程中稍有降低,日全食过后高度略增,钠层变化特性表现出快速的日出日落过程.电离层电子总含量和天空背景光噪声也随日全食期间太阳辐照的变化而呈现出明显下降和上升的波动特征.所不同的是,钠层原子的这种半宽度起伏变化要比电离层的变化迟缓得多,这可能是由于钠层受到日全食辐照扰动后,会产生一系列复杂的光化学反应及动力输运过程,再复合成钠原子被激光雷达探测到,有一个滞后过程,这也正好与理论模拟的结果相符.

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