[A-CG29] 中緯度大気海洋相互作用

[ACG29-P02] 2017/18年寒冬と2019/20年暖冬のAGCMによる再現実験

*西井 和晃¹、田口 文明²、中村 尚³ (1.三重大学大学院生物資源学研究科、2.富山大学学術研究部都市デザイン学系、3.東京大学先端科学技術センター)

キーワード：中緯度海洋、大気大循環モデル

We conducted AGCM experiments for 2017/18 winter when Japan suffered from a cold surge, as well as for 2019/20 winter when Japan experienced unusually warminess. Our AGCM cannot reproduce the 2017/18 cold winter in Japan. This may be because convective activity over the eastern Indian Ocean is suppressed too much in response to cool SST anomalies there. The extratropical SST anomalies also contributed to the warminess. While in the 2019/20 winter, our AGCM can successfully simulate the warminess around Japan. This is associated with well simulation of convective activity over the Indian Ocean, and the maritime continent. The extratropical SST anomalies also contributed to the formation of the anticyclonic anomalies and warming over Japan.