Polar cap patch segmentation of the tongue of ionization in the morning convection cell

• 作 者: Q.-H.Zhang[1]M.Lester[2]B.-C.Zhang[3]J.Moen[4]M.Lockwood[5]I.W.McCrea[6]H.-G.Yang[3]H.-Q.Hu[3]R.-Y.Liu[3]S.-R.Zhang[7]
• 机 构: SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai, China
• 出 处: 2012中国极地科学学术年会
• 发表日期: 2012年期

　　Two types of poleward-moving plasma concentration enhancements (PMPCEs) were observed during a sequence of pulsed reconnection events, both in the morning convection cell:i) Type one is associated with the cusp flow channel likely produced by auroral particle impact ionization, ii) Type two density enhancements is addressed to segmentation of the tongue of ionization (TOI).Interestingly, in this case the type 2 PMPCEs were inter-spaced by the type 1 PMPCEs, which underlines the importance of cusp flow channels as a segmentation mechanism, and which also underlines the importance of differentiating between at least two classes of electron density patches.We present the first clear evidence that TOI patches may enter cusp throat region on the cusp inflow region which is key scientific knowledge in order to developing physically based GNSS scintillation forecasts for the polar cap.