嘉宾(Presenter)：Prof. Larry Lyons (UCLA)
时间（Date & Time）：November 14, 2018, 19:00-21:00
地点(Venue):闻天楼南楼一楼260人报告厅, Wentian Building
题目(Title)：Secrets of the Northern Lights: The Earth’s Aurora
When the sun goes down and skies are clear, beautiful displays of colored light are often visible within oval shaped regions surrounding the magnetic poles. These displays are known as the northern/southern lights, or the aurora, and they can sometimes be dramatically brilliant and dynamic and show a variety of color. The light originates at altitudes of 100-300 km (60-180 miles), and reflects release of energy that is carried by solar particles and becomes trapped within the Earth’s magnetic field far above the surface. How is the light emitted? What is the variety of aurora patterns, and what do they mean? What releases the energy that powers them? How do the aurora and the processes that give rise to it affect our lives? These questions, and more, will be addressed.
Professor L. Lyons received his PhD with a Space Physics specialty at the University of California, Los Angeles (UCLA). After spending time at three other institutions, he returned to UCLA, becoming a Distinguished Professor in the Department of Atmospheric and Oceanic Sciences. His primary research interests involve the interaction of solar-wind energy with the Earth's environment. His interests include the aurora and Space Weather disturbances, has taught introductory courses on the atmospheric environment, is Fellow of the American Geophysical Union, and has mentored many graduate students and young researchers who are currently active within the Space Physics community.