JpGU-AGU Joint Meeting 2017

講演情報

[EE] ポスター発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS03] [EE] 最新の大気科学:海大陸研究強化年-YMC

2017年5月21日(日) 13:45 〜 15:15 ポスター会場 (国際展示場 7ホール)

コンビーナ:米山 邦夫(海洋研究開発機構 基幹研究領域 大気海洋相互作用研究分野)、Chidong Zhang(NOAA Pacific Marine Environmental Laboratory)、竹見 哲也(京都大学防災研究所)

[AAS03-P03] Diurnal and intraseasonal lightning activities over the western maritime continent during the pre-YMC observations in 2015

*浜田 純一1森 修一2勝俣 昌己2松本 淳1,2ファドリ シャムスディン3米山 邦夫2 (1.首都大学東京都市環境学部、2.国立研究開発法人海洋研究開発機構、3.インドネシア技術評価応用庁)

Lightning activities over the western Indonesian maritime continent are investigated by using worldwide lightning location network (WWLLN) data for the pre-YMC observations in 2015 (November-December, 2015).

As described in previous studies, diurnal cycle of lightning with clear island-sea contrast is predominant over the region. Frequent lightnings are observed in the mountainous region of Java/Sumatra in the afternoon/evening, whereas the night/early morning lightnings are predominant in the off coastal region of southern Sumatra and Malacca straight. Intraseasonal lightning variations with the phases of MJO convection are also observed. In the inactive (active) phase of MJO convection over the maritime continent, lightnings are more active in the western (eastern) side of the steep mountains of Sumatra under low-level easterly or weak (westerly) wind conditions.

We will discuss a link among the temporal/spatial variations of lightning activities, atmospheric stability and development of convective cloud system in the coastal region of Sumatra by using the in situ sounding and radar observation data.