Japan Geoscience Union Meeting 2016

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Poster

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM16] Physics and Chemistry in the Atmosphere and Ionosphere

Tue. May 24, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Yuichi Otsuka(Solar-Terrestrial Environment Laboratory, Nagoya University), Takuya Tsugawa(National Institute of Information and Communications Technology), Seiji Kawamura(National Institute of Information and Communications Technology)

5:15 PM - 6:30 PM

[PEM16-P04] Global occurrence distributions and rates of lightning and TLEs and their LT dependences

*Tsuyoshi Sato1, Mitsuteru Sato2, Tomoo Ushio3, Takeshi Morimoto4, Toru Adachi5, Makoto Suzuki6, Atsushi Yamazaki6, Yukihiro Takahashi1 (1.Department of Cosmosciences, Graduate School of Science, Hokkaido University, 2.Department of Cosmoscience, Hokkaido University, 3.Information and communication engineering department, Osaka University, 4.Faculty of Science and Engineering, Kindai University, 5.The Meteorological Satellite and Observation System Department, Meteorological Research Institute, 6.Institute for Space and Astronautical Sciences, Japan Aerospace Exploration Agency)

Keywords:TLEs

Transient Luminous Events (TLEs) are the instantaneous discharge phenomena excited by intense cloud-to-ground (CG) discharges. Using the optical data obtained by the FORMOSAT-2/ISUAL data, global occurrence distributions and rates of TLEs were estimated. However, due to the sun-synchronous polar orbit of the FORMOSAT-2 satellite, the local time (LT) dependences of the global occurrence rates of TLEs has not been estimated. In this study, we analyzed optical data obtained by the JEM-GLIMS (Global Lightning and Sprite Measurements on JEM-EF) instruments onboard the ISS (International Space Station) for the period from December 2012 to November 2014. Since the orbital inclination of the ISS is 51°, we can estimate more accurate global occurrence distributions and rates of lightning and TLEs and their LT dependences. From our data analyses, it is found that the estimated occurrence distributions of lightning and TLEs are mainly centered over the Africa, Southeast Asia, and Central America. It is also found that the LT dependences of lightning and TLEs occurrence rates showed small peak at 20LT and gradual increase from 00LT to 03LT. At the presentation, we will show the results derived from our data analyses more in detail and will discuss the possible reasons for the estimated LT dependences of lightning and TLEs occurrence rates.