Solar extreme‐ultraviolet irradiance for general circulation models
Solar extreme‐ultraviolet irradiance for general circulation models
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DOI：
10.1029/2005ja011160
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发表时间：
2005-10
影响因子：
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通讯作者：
S. Solomon;L. Qian
中科院分区：
文献类型：
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作者：
S. Solomon;L. Qian
[1]最近对太阳极端紫外光谱的测量提供了高分辨率光谱辐照度，可用于计算高层大气的电离和离解率，并提供改进的太阳光谱代理模型。这些都是全球热层和电离层随时间变化的大气环流模型的关键输入，但计算经济要求在计算中使用较低分辨率的光谱，而不会过度损失准确性。电离产生的光电子使问题更加复杂，这会导致大气气体的进一步电离和离解。我们描述了一种使用太阳光谱测量或模型来计算整个高层大气的电离和解离速率的方法，包括光电子效应，这比它的前辈更准确，更有效。给出了使用TIMED卫星上的太阳极紫外线实验测量值和EUVAC模型的实例，并显示了使用国家大气研究中心热层-电离层-电动力学大气环流模型的实例计算。
[1] Recent measurements of the solar extreme-ultraviolet spectrum provide high-resolution spectral irradiance that can be used for calculating ionization and dissociation rates in the upper atmosphere and for providing improved proxy-based models of the solar spectrum. These are crucial inputs for global time-dependent general circulation models of the thermosphere and ionosphere, but computational economies require that a lower-resolution spectrum be used in the calculations without excessive loss of accuracy. The problem is compounded by the photoelectrons generated by ionization, which cause further ionization and dissociation of atmospheric gases. We describe a method for using solar spectral measurements or models to calculate ionization and dissociation rates throughout the upper atmosphere, including photoelectron effects, that is more accurate and more efficient than its predecessors. Examples of use with measurements from the Solar EUV Experiment on the TIMED satellite and with the EUVAC model are given, and an example calculation using the National Center for Atmospheric Research thermosphere-ionosphere-electrodynamics general circulation model is shown.