University of Colorado at Boulder, USA

Abstract:
The Antarctic atmosphere provides a unique natural laboratory for studying the complex physical, chemical and dynamical processes in the Earth’s atmosphere and space environment. However, this region remains one of the least understood regions of the atmosphere. In particular, very little is known about the neutral atmosphere in the altitude range of 100–200 km because observations were very rare. LIDAR (light detection and ranging) is addressing this issue with the unmatched capabilities of observing metal atoms, neutral temperatures, neutral winds and gravity waves well into the thermosphere. In particular, the lidar observational campaign we are conductingat McMurdo Station in Antarctica has revealed several intriguing science discoveries recently.McMurdo (77.83°S, 166.66°E) is to the east of the Trans-Antarctic Mountainsand by the poleward edge of the aurora oval.In this seminar wewill introduce lidar as an innovative research field that integrates spectroscopy fundamentals, laser technologies,photonics, optoelectronics, and modern data acquisition to explore the atmosphere and space. Weshare the experience gained from our journey in the last 15 years of making science discoveries from the North Pole to the South Pole (pole-to-pole) with lidar. One focus is a very recent lidar discovery from McMurdo– the neutral iron (Fe) layers with gravity wave signatures extended well into the thermosphere (~160 km). Not only is this the first time for a single instrument to trace gravity waves from 30 to 155 km, but also it enables the first direct measurements of neutral temperatures deep into the E-region. Such discovery has opened the door to observing the neutral polar atmosphere with ground-based instruments.McMurdo lidar campaign has answered a few questions but many new results are challenging our understandings. We welcome collaborations from the community.

Biography:
美国科罗拉多大学的初鑫钊教授是世界著名的激光雷达(LIDAR)科学家。她是激光雷达原理技术的创新开拓者和以激光雷达研究全球大气科学的知名学者。她是国际上用激光雷达对南北极点(Pole-to-Pole)进行大气探测的第一人，取得了重大的科学发现，并引领国际激光雷达的发展方向。初鑫钊教授于1998年研制成功了世界上第一台铁原子(Fe)玻尔兹曼激光雷达，并于1999年夏季成功地飞越地球北极，开创了世界首次北极点(NorthPole)上空的探测纪录。1999年11月-2001年11月，初鑫钊在地球南极点(South Pole)科考站，成功地进行了激光雷达大气研究。2002年-2005年，她在英国的南极科考站(Rothera)实现大气观测。自2010年12月起，初鑫钊教授率领她的团队在南极McMurdo科考站建激光雷达站，成就了世界上第一个南极大气科学探测链。初鑫钊教授正在研发的可移动式Fe共振荧光/瑞利/米多普勒测温测温风激光雷达是世界上最先进的激光雷达技术，她的论文被国际激光雷达大会评为最佳文章奖。初鑫钊教授是世界上唯一的一个集Fe, Na，K共振荧光激光雷达，多普勒和玻尔兹曼激光雷达技术于一身的科学家。她也是世界上少有的对全球高，中，低纬大气都进行了观测研究的激光雷达科学家。作为科罗拉多大学的终身教授，初鑫钊教授担任美国激光雷达技术中心主任，领导世界发展方向。她在国际著名学术期刊上发表约45篇论文，2004年在Science上发表1篇；并多次在国际学术会议上做重要报告。其撰写的《Laser Remote Sensing》著作中的“中高层大气共振荧光激光雷达”是激光雷达最权威的论述。

联系人：戴希 研究员（82648057）
报告邀请人：高鸿钧 院士（82648035）