{"title":"海洋对印度洋 50-80 天寒带冬季季内振荡的反馈：大气模拟与 CESM2 耦合模拟的比较","authors":"Yun Liang, Ruixue Xia, Yan Du","doi":"10.1088/1748-9326/ad667a","DOIUrl":null,"url":null,"abstract":"\n The role of sea surface temperature (SST) variability in the boreal winter intraseasonal oscillation (ISO) over the tropical Indian Ocean (TIO) is investigated in this study using the Community Earth System Model Version 2 (CESM2). An atmospheric general coupled model (AGCM) run forced by daily SSTs derived from a parallel coupled circulation model (CGCM) run is compared with reanalysis and the original coupled simulation. The comparison of atmospheric-coupled GCMs reveals the frequency and spatial tendency of the SST effect on the atmospheric ISO. The lower-frequency component of the ISO over the TIO is significantly intensified in the AGCM run. The SST-to-atmosphere effect is most prominent over the southeastern TIO. In the AGCM run, low-level wind anomalies related to SST appear west of the ISO convection center, contrasting with the previous findings that the SST effect appears east of the convection center.","PeriodicalId":507917,"journal":{"name":"Environmental Research Letters","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ocean feedback on 50–80-day boreal winter intraseasonal oscillation in the Indian Ocean: Comparison of atmospheric and coupled CESM2 simulations\",\"authors\":\"Yun Liang, Ruixue Xia, Yan Du\",\"doi\":\"10.1088/1748-9326/ad667a\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n The role of sea surface temperature (SST) variability in the boreal winter intraseasonal oscillation (ISO) over the tropical Indian Ocean (TIO) is investigated in this study using the Community Earth System Model Version 2 (CESM2). An atmospheric general coupled model (AGCM) run forced by daily SSTs derived from a parallel coupled circulation model (CGCM) run is compared with reanalysis and the original coupled simulation. The comparison of atmospheric-coupled GCMs reveals the frequency and spatial tendency of the SST effect on the atmospheric ISO. The lower-frequency component of the ISO over the TIO is significantly intensified in the AGCM run. The SST-to-atmosphere effect is most prominent over the southeastern TIO. In the AGCM run, low-level wind anomalies related to SST appear west of the ISO convection center, contrasting with the previous findings that the SST effect appears east of the convection center.\",\"PeriodicalId\":507917,\"journal\":{\"name\":\"Environmental Research Letters\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-07-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Research Letters\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1088/1748-9326/ad667a\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Research Letters","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/1748-9326/ad667a","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
本研究利用共同体地球系统模式第 2 版（CESM2）研究了热带印度洋（TIO）上空北半球冬季季内振荡（ISO）中海面温度（SST）变率的作用。在平行耦合环流模式（CGCM）运行得出的日海温的强迫下，对大气一般耦合模式（AGCM）运行与再分析和原始耦合模拟进行了比较。大气耦合 GCM 的比较揭示了 SST 对大气 ISO 影响的频率和空间趋势。在 AGCM 运行中，TIO 上的 ISO 低频成分明显增强。海温对大气的影响在 TIO 东南部最为突出。在 AGCM 运行中，与 SST 有关的低层风异常出现在 ISO 对流中心以西，这与之前的发现形成了鲜明对比，即 SST 效应出现在对流中心以东。
Ocean feedback on 50–80-day boreal winter intraseasonal oscillation in the Indian Ocean: Comparison of atmospheric and coupled CESM2 simulations
The role of sea surface temperature (SST) variability in the boreal winter intraseasonal oscillation (ISO) over the tropical Indian Ocean (TIO) is investigated in this study using the Community Earth System Model Version 2 (CESM2). An atmospheric general coupled model (AGCM) run forced by daily SSTs derived from a parallel coupled circulation model (CGCM) run is compared with reanalysis and the original coupled simulation. The comparison of atmospheric-coupled GCMs reveals the frequency and spatial tendency of the SST effect on the atmospheric ISO. The lower-frequency component of the ISO over the TIO is significantly intensified in the AGCM run. The SST-to-atmosphere effect is most prominent over the southeastern TIO. In the AGCM run, low-level wind anomalies related to SST appear west of the ISO convection center, contrasting with the previous findings that the SST effect appears east of the convection center.
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