题目：Statistical study of dipolarization fronts: Cluster observations

主讲：孙为杰

时间：2013年01月21日（周一）下午4：30

地点：科学实验楼学术报告厅

摘要：

The dipolarization fronts are investigated by the Cluster. The MDD and STD methods are employed to calculate the propagating velocity of the dipolarization front. It is found that the propagating velocities of dipolarization fronts are often larger than the background plasma velocity. Stiatistical analysis show that the thickness of the dipolarization fronts is about two times of the background proton inertial length, and it is comparable with the background proton gyro-radius. The current density of the dipolarization front is nearly perpendicular to its propagating direction. The field-aligned currents on the dipolarization fronts are often very large. In the dusk side of the magnetotail, the field-aligned current is towards the neutral sheet, while in the dawn side of the magnetotail the field-aligned current is away from the neutral sheet, which consist with the substorm current wedge.

简介：

教育经历

2005-2009山东大学威海分校获学士学位

2009-2012山东大学获硕士学位

2012-至今北京大学地球与空间科学学院在读博士

文章列表：

Sun W. J., Q. Q. Shi, S. Y. Fu, Z. Y. Pu, M. W. Dunlop, A. P. Walsh, Q. G. Zong, T. Xiao, C. L. Tang, H. Reme, C. Carr, E. Lucek, A. Fazakerley: Cluster and TC-1 observation of magnetic holes in the plasma sheet, Ann. Geophys., 30, 583-595, 2012 doi:10.5194/angeo-30-583-2012.

Sun W. J., Q. Q. Shi, S. Y. Fu, Q.-G. Zong, Z. Y. Pu, L. Xie, T. Xiao, L. Li, Z. X. Liu, H. Reme, and E. Lucek. Statistical research on the motion properties of the magnetotail current sheet: Cluster observations. Sci China Tech Sci, 2010, 53: 1732−1738, doi: 10.1007/s11431-010-3153-y.

Xiao, T., Shi, Q. Q., Zhang, T. L., Fu, S. Y., Li, L., Zong, Q. G., Pu, Z. Y., Xie, L., Sun, W. J., Liu, Z. X., Lucek, E., and Reme, H.: Cluster-C1 observations on the geometrical structure of linear magnetic holes in the solar wind at 1 AU, Ann. Geophys., 28, 1695-1702, doi:10.5194/angeo-28-1695-2010, 2010.

Fu S Y, Shi Q Q, Wang C, Parks G K, Zheng L, Zheng H, Sun W J,: High-speed flowing plasmas in the Earth’s plasma sheet. Chinese Sci Bull, 2011, 56, doi: 10.1007/s11434-011-4361-y.