[A-CG09] Satellite Earth Environment Observation

[ACG09-09] 静止軌道からの雷放電観測の重要性

*佐藤 光輝¹、牛尾 知雄²、足立 透³、鈴木 睦⁴ (1.北海道大学 大学院理学研究院、2.大阪大学 大学院工学研究科、3.気象庁気象研究所、4.宇宙科学研究所 JAXA)

キーワード：雷放電, 静止軌道衛星, データ同化, 極端気象現象, 直前予測

Lightning is a good proxy to represent the activities of the deep convections in the tropics and subtropics. Recent studies showed a close relation between lightning activities and typhoon (hurricane) intensities, upper-tropospheric water vapor variability, and temperature fluctuations in the tropical atmosphere. Moreover, a number of studies on the lightning data assimilation into mesoscale models presented considerable improvement in the accuracy of the weather forecast. As the importance of the lightning measurements are greatly acknowledged, a single-channel, near-infrared optical camera, named Geostationary Lightning Mapper (GLM), will be onboard GOES-R and GOES-S. In Europe, same type of the lightning detector, named Lightning Imager (LI), will be onboard MTG-I. After the launch of these geostationary satellites, which is planned within a few years, lightning activities over North and South America, Africa, Europe, the Atlantic Ocean, and the Indian Ocean will be continuously monitored. However, an installation of the lightning detector on the future MTSAT series is not planned so far. At the presentation, we will discuss the importance of lightning observations from geostationary orbit and their applications.