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-P04] Numerical simulations of a diurnal cycle of precpitation during Pre-YMC field campaign

*安永 数明1,2中江 寛大1 (1.国立大学法人 富山大学、2.海洋研究開発機構)

Diurnal cycles of precipitation over the Maritime Continent (MC) are investigated, making use of a cloud resolving models (Scale and WRF). Some numerical simulations were conducted to reproduce the diurnal cycle observed during the “Pre-YMC” field campaign in late November- December 2015. In the earlier period of the campaign, the background zonal wind was easterly, because the Madden-Julian Oscillation (MJO) stayed over the Indian Ocean, and the precipitation system migrating to the west was frequently observed. After the middle of December, the MJO passed over the MC region, and the background zonal wind turned to westerly. Following the change of the zonal wind direction, the precipitation system migrating to the east was dominant. Numerical simulations successfully captured the diurnal cycle of precipitation over the land and the migration of the precipitation systems was well reproduced during both periods in term of the direction. However, the migration speed was different among the simulations. From some sensitivity tests, it is concluded that the horizontal resolution of the model is most critical to reproduce the realistic migration speed.