Global electric circuit could be the key link between the space weather and low atmosphere climate. It has been suggested that the ultrafine aerosol layer in middle to upper stratosphere could set large contribution to the local column resistance and the return current density. In previous work by Tinsley and Zhou (2006), the artificial ultrafine layer was addressed and it caused symmetric significant effect on column resistance in high latitude. In this work we use the update aerosol coupled chemical climate model to establish the new global electric circuit model. The results show that the ultrafine aerosol layer exits in middle stratosphere, but due to the Brewer‐Dobson circulation, there is significant seasonal variation of the ion loss due to the ultrafine aerosol layer variation. In winter hemisphere in high latitude region the column resistance will consequently higher than that in summer hemisphere. With ultrafine aerosol layer in decline phase of solar activity, the column resistance would be more sensitive to the LEE and MEE particle precipitation flux fluctuation.

中文翻译：

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通过气溶胶耦合化学气候模型评估全球电路对巨大火山爆发的响应

全球电路可能是空间天气与低气压气候之间的关键联系。有人认为，平流层中上至上层的超细气溶胶层可能会对局部柱电阻和返回电流密度产生很大的影响。在Tinsley和Zhou（2006）的先前工作中，解决了人造超细层问题，它对高纬度地区的柱电阻产生了对称的显着影响。在这项工作中，我们使用更新的气溶胶耦合化学气候模型来建立新的全球电路模型。结果表明，超细气溶胶层存在于平流层中层，但由于Brewer-Dobson循环，由于超细气溶胶层的变化，离子损失存在明显的季节性变化。因此，在高纬度地区的冬季半球，柱阻力将高于夏季半球。当超细气溶胶层处于太阳活动的下降阶段时，柱电阻将对LEE和MEE粒子的沉淀通量波动更加敏感。