[A-AS08] 成層圏―対流圏相互作用

[AAS08-02] Hindcast Experiment of the 2009 Sudden Stratospheric Warming and Following Elevated Stratopause Event by Using a High-Top Gravity Wave Resolving Model

★Invited Papers

*野口 峻佑¹、渡邉 真吾¹、小新 大²、佐藤 薫² (1.国立研究開発法人 海洋研究開発機構、2.東京大学)

キーワード：成層圏突然昇温、成層圏界面上昇、重力波解像モデル

A series of hindcast experiments on the 2009 Sudden Stratospheric Warming (SSW) and following Elevated Stratopause (ES) event is conducted by using a high-top model named Japanese Atmospheric General circulation model for Upper Atmospheric Researches (JAGUAR). A comparative examination of hindcasts by JAGUAR in both a Gravity Wave (GW) resolving setting and a low-resolution setting with GW parametrizations reveals a superior performance of the former on reproducing detailed features of the SSW-ES event. In particular, the ES-related residual circulation in the polar mesosphere-lower thermosphere tends to show different behavior despite some effort of tuning parameters in the later. This talk will present details of such a benefit of the explicit simulation of GWs and discuss some challenges in the predictability study of the middle atmosphere.