Establishment of high accurate lightning forecast by using 3-dimensional lightning observation system and polarimetric radar

2015 Fiscal Year Final Research Report

• Project/Area Number: 25350514
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Natural disaster / Disaster prevention science
• Research Institution: Japan, Meteorological Research Institute
• Principal Investigator: Hayashi Syugo 気象庁気象研究所, 予報研究部, 主任研究官 (20354441)
• Co-Investigator(Kenkyū-buntansha): KUSUNOKI KENICHI 気象庁気象研究所, 気象衛星・観測システム研究部, 室長 (40354485)
• Co-Investigator(Renkei-kenkyūsha): FUJIBE FUMIAKI 首都大学東京, 都市環境学部地理環境コース, 特任教授 (60343886)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 雷観測 / 偏波レーダ情報 / 積乱雲 / シビアストーム / 雷災害

Outline of Final Research Achievements

It is well known that existence of graupel in a thunderstorm is very important for lightning initiation. But the location and electrical charge of graupel in a thunderstorm is not clarified. In this study, using 3-dimensional lightning observation system and polarimetric radar data, the characteristics of graupel volume and upward velocity in a thunderstorm are clarified. As a result, it is revealed that several tens cubic kilometer of graupel volume is needed for a lightning initiation. Based on these results, lightning forecast is improved.

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