Role of the subtropical southern Indian Ocean in the interannual variability of Antarctic summer sea ice

IF 4.5 2区地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES

Atmospheric Research Pub Date : 2024-10-10 DOI:10.1016/j.atmosres.2024.107723

{"title":"Role of the subtropical southern Indian Ocean in the interannual variability of Antarctic summer sea ice","authors":"","doi":"10.1016/j.atmosres.2024.107723","DOIUrl":null,"url":null,"abstract":"<div><div>Through data diagnosis and dynamic analysis, this study aims to reveal the potential influence of the Subtropical Dipole Pattern (SDP) in the southern Indian Ocean on the interannual variation of south polar sea ice. The results indicate that a robust teleconnection exists between the SDP and south polar sea ice. At least two months in advance, the SDP significantly affects the Antarctic summer sea-ice anomalies. Specifically, during the positive (negative) phase of the SDP, the Amundsen–Ross Sea and the western Indian Ocean sectors exhibit significant positive (negative) sea-ice anomalies, accompanied by negative (positive) sea-ice anomalies in the Bellingshausen Sea and the Weddell Sea. Planetary wave trains, stimulated over the SDP by anomalous rainfall and latent heat release, establish this teleconnection. These planetary wave trains, guided by westerly jets, then spread eastward and poleward, causing atmospheric circulation anomalies that affect Antarctic sea ice. The Antarctic sea-ice anomalies connected to the SDP are mostly consistent with abnormalities in the surface air temperature and wind fields.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":null,"pages":null},"PeriodicalIF":4.5000,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atmospheric Research","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0169809524005052","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METEOROLOGY & ATMOSPHERIC SCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

Through data diagnosis and dynamic analysis, this study aims to reveal the potential influence of the Subtropical Dipole Pattern (SDP) in the southern Indian Ocean on the interannual variation of south polar sea ice. The results indicate that a robust teleconnection exists between the SDP and south polar sea ice. At least two months in advance, the SDP significantly affects the Antarctic summer sea-ice anomalies. Specifically, during the positive (negative) phase of the SDP, the Amundsen–Ross Sea and the western Indian Ocean sectors exhibit significant positive (negative) sea-ice anomalies, accompanied by negative (positive) sea-ice anomalies in the Bellingshausen Sea and the Weddell Sea. Planetary wave trains, stimulated over the SDP by anomalous rainfall and latent heat release, establish this teleconnection. These planetary wave trains, guided by westerly jets, then spread eastward and poleward, causing atmospheric circulation anomalies that affect Antarctic sea ice. The Antarctic sea-ice anomalies connected to the SDP are mostly consistent with abnormalities in the surface air temperature and wind fields.

查看原文本刊更多论文

亚热带南印度洋在南极夏季海冰年际变化中的作用

本研究旨在通过数据诊断和动态分析，揭示南印度洋副热带偶极模式（SDP）对南极海冰年际变化的潜在影响。研究结果表明，副热带偶极模式与南极海冰之间存在着强有力的远程联系。至少提前两个月，SDP 就会对南极夏季海冰异常产生重大影响。具体来说，在 SDP 的正值（负值）阶段，阿蒙森-罗斯海和西印度洋海区表现出明显的正值（负值）海冰异常，同时贝林斯豪森海和威德尔海也出现负值（正值）海冰异常。行星波列受异常降雨和潜热释放的刺激，在 SDP 上建立了这种远距离联系。这些行星波列在西风喷流的引导下，向东和向极地扩散，造成大气环流异常，从而影响南极海冰。与 SDP 有关的南极海冰异常大多与地表气温和风场的异常一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Atmospheric Research 地学-气象与大气科学

CiteScore

9.40

自引率

10.90%

发文量

460

审稿时长

47 days

期刊介绍： The journal publishes scientific papers (research papers, review articles, letters and notes) dealing with the part of the atmosphere where meteorological events occur. Attention is given to all processes extending from the earth surface to the tropopause, but special emphasis continues to be devoted to the physics of clouds, mesoscale meteorology and air pollution, i.e. atmospheric aerosols; microphysical processes; cloud dynamics and thermodynamics; numerical simulation, climatology, climate change and weather modification.