17:15 〜 18:45
[MIS06-P04] Characteristics of lighting estimated by quasi-static field observations in Metro Manila, Philippines
★Invited Papers
キーワード：雷放電、準静電場、マニラ首都圏
In various regions, particularly Southeast Asia, there has been a noticeable increase in heavy rainfall induced by cumulonimbus clouds in recent years. However, accurately predicting meteorological phenomena at the scale of cumulonimbus clouds remains challenging with current observation networks and analysis models. Lightning, which typically precedes heavy rainfall by a few minutes, serves as a valuable indicator for forecasting. This study aims to operationalize the integration of lightning data into heavy rainfall prediction by examining its correlation with meteorological data across three key prediction elements: "location," "time," and "intensity." Observations were conducted using quasi-static field measurements (plate-type capacitive antennas), which provide estimates of the three-dimensional position and quantity of charge neutralization within cumulonimbus clouds. Analysis of quasi-static field observation data gathered in Manila, Philippines, from May 1 to September 30, 2023, between 6:00 and 9:00 UTC recorded a total of 176 events from six cumulonimbus clouds. The average neutralization charge altitude was 9,150m, with an average neutralization charge quantity of 50.0 C and an average charge moment of 470.0 Ckm. The average distance between lightning occurrence and precipitation was 6.5 km, with an average time difference of 9 minutes. These findings not only affirm the validity of each observation method but also contribute to a deeper understanding of lightning characteristics.