Ion-neutral coupling and SAPS

Shunrong Zhang (MIT Haystack Observatory)

时间：2016年8月18日 15:00-16:30

地点：南楼208室

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The Subauroral Polarization Stream (SAPS) is a large ionospheric plasma velocity in the horizontal direction associated with the magnetosphere-plasmasphere processes during geospace storms. The occurrence of SAPS is repeatable and regular and the high impact of this large dynamics on the ionosphere-thermosphere system is expected. We use observations during the March 17-18, 2015 great geomagnetic storm to demonstrate a sequence of I-T changes that are caused by SAPS directly and indirectly. These changes include frictional heating related neutral atmospheric uperwelling as well as plasma uperwelling (ion upflow), which occur often in auroral areas but not well-known for subauroral latitudes.

张顺荣，旅美空间物理学家。他在美国麻省理工学院Haystack观象台工作16年。在其20多年海外工作期间，曾经在意大利国际理论物理中心(ICTP)、日本京都大学、美国波士顿大学等学术机构和大学工作。曾经入选1998年中国科学院百人计划项目。曾获中国青年科技奖、国务院政府特殊津贴和国际空间研究委员会（COSPAR）的Zeldovich奖。主要专注于空间科学尤其是电离层和热层物理的研究，高层大气的雷达研究等。