| 报告题目： |
Optical auroras: a remote-sensing tool for near-Earth space |
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| 报告人： |
梁君 博士 |
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| 报告人单位： |
加拿大卡尔加里大学物理与天文系 |
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| 报告时间： |
2023年4月25日(周二)下午5:00-6:30 |
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| 报告地点： |
精密重力测量科学中心大楼W510会议室 |
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| 邀请人： |
吴庆文 教授 |
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| 报告摘要： |
The northern lights, or the aurora borealis, are colorful dancing waves of light that have captivated people for millennia. The earliest written record of auroras found to date can be traced back to Zhou dynasty (~970 BCE) of ancient China. Auroras are produced when energetic particles from outer space collide with the Earth’s atmosphere. Different auroral emission lines at different wavelengths (colors) are characteristic of different transport processes of energetic particles and excitation processes in the atmosphere. Ground optical observations are powerful tools to trace the spatiotemporal variations of auroras and to remote-sense the associated particle energization and transport processes in the near-Earth space. In this seminar, I will first introduce the basic property, classification, and morphology of auroras. I will then introduce the optical instruments and basic observational techniques for quantitative auroral measurements, with focus on those deployed by the University of Calgary, Canada. I will exemplify how the optical auroral observations, together with other instruments and theoretical models, can be used in remote-sensing the plasma dynamics in a space region from ~100 km above the ground to ~10 Earth radii away from the Earth. |
| 报告人简介： |
梁君 (Liang Jun), 男, 1990 年毕业于武汉大学空间物理系，1995 年硕士毕业于武汉物理所。2004 于加拿大 University of Saskatchewan 获PhD 学位。之后曾于加拿大空间局从事博士后工作。2009 年来到加拿大 Calgary 工作至今。现于University of Calgary 的天文物理系担任Senior Research Scientist. 主要研究兴趣包括: Auroral instrument and calibration, Pulsating auroras and diffuse auroras, Substorm dynamics and onset mechanisms, Auroral electron transport modeling, Proton precipitation and mechanisms, New subauroral optical phenomena such as STEVE and Picket Fence. |
| 参会人员： |
全体师生 |
