【摘 要】
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We present the first direct observations of polar cap patches segmented from the tongue of ionization (TOI),subsequently entering the polar cap in the dawn convection cell.The extended and pulsed conv
【机 构】
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SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai
【出 处】
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第十届海峡两岸空间/太空科学研讨会
论文部分内容阅读
We present the first direct observations of polar cap patches segmented from the tongue of ionization (TOI),subsequently entering the polar cap in the dawn convection cell.The extended and pulsed convection driven by the burst of magnetopause reconnection is able to divert the high density mid-latitude plasma (storm enhanced densities (SED) moving poleward across the cusp and forming a TOI.The clear evidences show that the TOI is segmented into patches by the electron precipitations flow channels generated by the pulsed reconnections.It is the downward Birkeland current sheet located at the equatorward boundary of the flow disturbance that represents the actual cutting mechanism.The events also show clear southward IMF BZ dependence.
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