13:45 〜 15:15
[MIS06-P04] Lightning observation in the Philippine Sea and its influence of tropical cyclones
キーワード：Lightning, Tropical cyclone, Philippine Sea
Lightning becomes active during the developing stage of cumulonimbus associated with strong upward motion. Recently the relationship between lightning activity and tropical cyclone (TC) intensity has been investigated. Lightning tends to increase during the rapid intensification of the TC. Lightning observation network are deployed over the western north Pacific by five very long frequency events trigger measurements called V-POTEKA at Palau, Guam, Manila Philippines, Okinawa Japan and Serpong Indonesia under the ULAT (Understanding Lightning and Thunderstorm) of SATREPS (Science and Technology Research Partnership for Sustainable Development) in the Philippines since 2017.
Lightning is active over the Philippine Sea. However, compare to the amount of cloud activities, lightning was not observed in all convection. When the TC is formed in the Philippine Sea, lightning tends to be active around the TC. On the other hand, when TC was located far from the Philippines over the open ocean, lightning activity was weak around the TC. The environment of land-based aerosol may be necessary for more lightnings in the TCs near the Philippines. In the addition to the TC itself, cumulonimbus spread widely over the Philippine Sea by the large-scale convergence of water vapor associated with TC circulation. TC Nalgae developed over the Philippine Sea and landed Philippines on October 28, 2022. Cumulonimbus spread widely more than 1000 km in width with very active lightning before TC landfall. TC landed in the Luzon Island of northern Philippines, passed near Manila, however landslide occurred in the Mindanao Island of southern Philippines.
Lightning is active over the Philippine Sea. However, compare to the amount of cloud activities, lightning was not observed in all convection. When the TC is formed in the Philippine Sea, lightning tends to be active around the TC. On the other hand, when TC was located far from the Philippines over the open ocean, lightning activity was weak around the TC. The environment of land-based aerosol may be necessary for more lightnings in the TCs near the Philippines. In the addition to the TC itself, cumulonimbus spread widely over the Philippine Sea by the large-scale convergence of water vapor associated with TC circulation. TC Nalgae developed over the Philippine Sea and landed Philippines on October 28, 2022. Cumulonimbus spread widely more than 1000 km in width with very active lightning before TC landfall. TC landed in the Luzon Island of northern Philippines, passed near Manila, however landslide occurred in the Mindanao Island of southern Philippines.