JpGU-AGU Joint Meeting 2017

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[EE] Poster

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

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

Mon. May 22, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Charles Lin(Department of Earth Science, National Cheng Kung University), Yang-Yi Sun(Kyushu Univsersuty, Department of Earth and Planetary Science), Hidekatsu Jin(National Institude of Information and Communications Technology), 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))

Keywords: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.