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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Ring current heating of the thermal electrons at solar maximum
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Ring current heating of the thermal electrons at solar maximum

机译：太阳最大时热电子的环流加热

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To quantify the energy input to the thermal electrons due to Coulomb collisional degradation of hot ions in the inner magnetosphere, the heating rate is calculated from the results of a time-dependent kinetic ring current model. The large June 4-7, 1991, storm during the last solar maximum, when the hot O+ content is maximal, is chosen for this study. Modeled electron heat fluxes into the topside ionosphere reach 10(11) eV cm(-2) s(-1) on the dusk side, a large value that will certainly have an impact on the density, temperature, and composition of the upper ionosphere and thermosphere. Comparable maximum values of heat inputs to the inner magnetospheric thermal plasma are expected to arise again during storms of the present solar maximum. The calculated heating rates from the ring current simulations are compared directly with detailed ionospheric modeling results for the Millstone Hill field line (L = 3). It is seen that heating from the ring current is more than adequate to account for the nightside topside heat input necessary to obtain the observed electron temperatures during this storm, even taking into account the limitations of the comparison. The reason for this is the abundance of O+ in the ring current at energies of a few tens of keV deep in the inner magnetosphere. [References: 48]
机译：为了量化由于内部磁层中热离子的库仑碰撞降解而导致输入到热电子的能量，从时变动力学环电流模型的结果计算出加热速率。这项研究选择了1991年6月4日至7日的大暴风雨，该暴风雨发生在最后一个太阳最大值时，此时的O +含量最高。模拟到顶部电离层的电子热通量在黄昏时达到10（11）eV cm（-2）s（-1），这个很大的值肯定会对上层电离层的密度，温度和成分产生影响和热圈。在当前太阳最大值的暴风雨期间，预计将再次出现输入内部磁层热等离子体的热量的可比较最大值。将根据环电流模拟计算出的加热速率直接与Millstone Hill场线（L = 3）的详细电离层建模结果进行比较。可以看出，即使考虑到比较的局限性，环电流产生的热量也足以解决在这场暴风雨中获得观测到的电子温度所必需的夜侧顶部热量输入。其原因是在内部磁层深数十keV的能量下，环电流中的O +丰富。 [参考：48]

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