Special seminar on atmospheric physics by Dr Chiao-Yao She, Emeritus Professor of Colorado State University, USA.
Dr Chiao-Yao She shared his insights into the measurement and implications of atmospheric temperature and wind velocities in his seminar entitled, "LIDAR capability for atmospheric temperature and wind measurements and enabled MLT science studies".
In Lidar (Light Detection and Ranging) a powerful laser light is irradiated upwards into the earth's atmosphere and the scattered light collected by sensitive detectors on earth to analyze the metallic composition, temperature, and wind velocity of specific layers of the atmosphere. Notably, UECs Takuo Tsuda, assistant professor at the Department of Computer and Network Engineering, who organized the seminar, is an expert on Lidar studies of the properties of metals such as sodium and potassium found at around 100 km above the earth's surface due to meteors breaking apart as they enter the atmosphere.
Dr She explained the physical principles of Lidar highlighting his own approach in the development of his own unique Lidar systems for the analysis of light scattering spectra for the measurement of atmospheric temperature and wind velocity.
According to Dr She, in the early days of his research it was only possible to detect scattered light at night but development of methods based on narrow band filters for exclusion of optical noise from sunlight led to the realization of continuous measurements over 24 hours at regions between 80 km to 105 km.
Dr She finished his seminar by giving his vision of future trends in atmospheric research. After the seminar Dr She joined the audience for a lively discussion about the topics covered during the seminar.
Related information on research by Takuo Tsuda, Department of Computer and Network Engineering, UEC, Tokyo.
UEC e-Bulletin article about Takuo Tsuda's research on Lidar and analysis of metals in the earth's atmosphere: "Geophysics: Insights into the origins of sodium and other metallic layers in the Earth's upper atmosphere"
UEC Tenure Track Program Meeting including research by Takuo Tsuda: "2015 Tenure Track Research Reports Meeting"
Recent publications by Takuo Tsuda:
- S.-i. Oyama, K. Shiokawa, Y. Miyoshi, K. Hosokawa, B. J. Watkins, J. Kurihara, T. T. Tsuda, and C. T. Fallen, Lower thermospheric wind variations in auroral patches during the substorm recovery phase, J. Geophys. Res. Space Physics, 121, doi:10.1002/2015JA022129, 2016.
- T. T. Tsuda, S. Nozawa, T. D. Kawahara, T. Kawabata, N. Saito, S. Wada, C. M. Hall, M. Tsutsumi, Y. Ogawa, S. Oyama, T. Takahashi, M. K. Ejiri, T. Nishiyama, T. Nakamura, and A. Brekke, A sporadic sodium layer event detected with five-directional lidar and simultaneous wind, electron density, and electric field observation at Tromsø, Norway, Geophys. Res. Lett., 42, 9190-9196, doi:10.1002/2015GL066411, 2015.
- T. T. Tsuda, X. Chu, T. Nakamura, M. K. Ejiri, T. D. Kawahara, A. S. Yukimatu, and K. Hosokawa, A thermospheric Na layer event observed up to 140 km over Syowa Station (69.0ºS, 39.6ºE) in Antarctica, Geophys. Res. Lett., 42, 3647-3653, doi:10.1002/2015GL064101, 2015.