An investigation comparing ground‐based techniques that quantify auroral electron flux and conductance
An investigation comparing ground‐based techniques that quantify auroral electron flux and conductance
复制标题
一项比较量化极光电子通量和电导的地面技术的研究
DOI：
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
M. Conde
中科院分区：
文献类型：
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作者：
S. Kaeppler;D. Hampton;M. Nicolls;A. Stromme;S. Solomon;J. Hecht;M. Conde
我们提出了三个案例研究，检查光学和雷达方法，指定沉淀极光通量参数和电导。选择了三个事件，对应于557.7 nm强度大于1 kR的中等非亚暴极光活动。提出了一种直接将前向电子输运模型的电子数密度拟合到交替编码非相干散射雷达数据的方法。一种方法，用于确定特征能量使用中性温度观测值进行比较，从非相干散射雷达的估计。这些技术集中在与当地地磁场对齐的视线观测上。良好的协议被发现之间的光学和非相干散射雷达方法的平均能量，能量通量和电导的估计。由罗宾逊等人（1987）预测的Pedersen电导与由非相干散射雷达观测计算的估计值非常一致。然而，我们提出了罗宾逊等人（1987）的关系式的更新形式，Δ H/Δ P=0.57 Δ E/Δ P = 0.53，发现它与非相干散射雷达观测更一致。这些结果仅限于类似的极光配置在这些案例研究。案例研究，量化极光电子通量参数和电导估计，可用于具体说明磁层驱动造成的电离层内耗散的能量的大小。
We present three case studies that examine optical and radar methods for specifying precipitating auroral flux parameters and conductances. Three events were chosen corresponding to moderate nonsubstorm auroral activity with 557.7 nm intensities greater than 1kR. A technique that directly fits the electron number density from a forward electron transport model to alternating code incoherent scatter radar data is presented. A method for determining characteristic energy using neutral temperature observations is compared against estimates from the incoherent scatter radar. These techniques are focused on line‐of‐sight observations that are aligned with the local geomagnetic field. Good agreement is found between the optical and incoherent scatter radar methods for estimates of the average energy, energy flux, and conductances. The Pedersen conductance predicted by Robinson et al. (1987) is in very good agreement with estimates calculated from the incoherent scatter radar observations. However, we present an updated form of the relation by Robinson et al. (1987), ΣH/ΣP=0.57〈E〉0.53, which was found to be more consistent with the incoherent scatter radar observations. These results are limited to similar auroral configurations as in these case studies. Case studies are presented that quantify auroral electron flux parameters and conductance estimates which can be used to specify the magnitude of energy dissipated within the ionosphere resulting from magnetospheric driving.
薄极光弧上的能量和通量变化
影响因子：
1.9
作者：
Dahlgren H
通讯作者：
Dahlgren H