JpGU-AGU Joint Meeting 2017

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[EE] ポスター発表

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM17] [EE] Recent Advances in Ionosphere Observation and Modeling for Monitoring and Forecast

2017年5月22日(月) 15:30 〜 17:00 ポスター会場 (国際展示場 7ホール)

コンビーナ:Lin Charles(Department of Earth Science, National Cheng Kung University)、Yang-Yi Sun(九州大学理学研究院 地球惑星科学部門)、陣 英克(情報通信研究機構)、Jaeheung PARK(Korea Astronomy and Space Science Institute)

[PEM17-P04] A Study of Lightning Activities and Geomagnetic Storms during 1998-2014

*Yi-Wei Chang1、Jann-Yenq Liu1 (1.Institute of Space Science, National Central University, Taiwan (R.O.C))

キーワード：Geomagnetic Storms, Lightning, TRMM, LIS

We apply z test statistically examining lightning activities 30 days before and after the geomagnetic storm onset during a 17-year period of 1998-2014. The lightning activities are observed by Lightning Imaging Sensor onboard TRMM (Tropical Rainfall Measuring Mission) satellite, while the storm onset is derived by the Dst index. It is found that lightning activities significantly reduce after the geomagnetic storm, and a greater storm can suppress lightning activities for a longer period. The results also show that that the suppression effect is more prominent in the northern hemisphere than that in the southern hemisphere. These implies the storm-generated electric field in the atmosphere and the continental (land) effect being essential.