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-P05] Ensemble downscaling of diurnal convection in the Maritime Continent associated with MJO during Pre-YMC 2015

*藤田 実季子1 (1.国立研究開発法人海洋研究開発機構)

キーワード:Diurnal variation, MJO, Downscaling

The diurnal convection and its amplitude around the Maritime Continent associated with MJO activity were investigated with the global ensemble forecast data. In the Pre-YMC period, the diurnal migration of clouds over the Sumatra Island toward the Indian Ocean is frequently observed, and the amplitude of diurnal cycle was associated with the particular MJO phase as reported in the previous studies. To investigate the relationship between diurnal amplitude and MJO activity statistically in the specific environmental fields in the Pre-YMC, we performed the dynamical downscaling with the data of global ensemble forecasts by NCEP. For the diurnal convection in regional scale, it is necessary to downscale these data to capture the interaction between the environmental field by MJO and the diurnal convections. The downscaled convections and precipitation tend to have large amplitude of diurnal cycle when the MJO activity was classified as strong by the MJO index. We will show the difference of diurnal structure that varies with the MJO’s environmental fields.