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| Improved Simulation of ENSO Variability Through Feedback From the Equatorial Atlantic in a Pacemaker Experiment | |
| Bi, Daohua1; Wang, Guojian1,2,3; Cai, Wenju1,2,3; Santoso, Agus1,4; Sullivan, Arnold1,5; Ng, Benjamin1; Jia, Fan3,6 | |
| 2022-01-28 | |
| 发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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| ISSN | 0094-8276 |
| 卷号 | 49期号:2页码:10 |
| 通讯作者 | Bi, Daohua([email protected]) ; Wang, Guojian([email protected]) |
| 摘要 | The tropical Pacific Ocean interacts with the tropical Atlantic Ocean on interannual time scales. However, most coupled climate models misrepresent and/or underestimate these teleconnections, which have important implications on the periodicity of the El Nino-Southern Oscillation (ENSO). Imposing the observed sea surface temperature over the tropical Atlantic from 1970 onwards, a pacemaker experiment is constructed using the second version of the Australian Community Climate and Earth System Simulator Coupled Model (ACCESS-CM2). Compared with control runs which reasonably simulate the interaction between ENSO and the north tropical Atlantic variability, the pacemaker experiment significantly improves the impact of the Atlantic Niiio/Niiia on ENSO. This enhanced teleconnection contributes to a more realistic ENSO periodicity compared with the control runs, thus suggesting that capturing the influence from equatorial Atlantic variability is important for an improved ENSO simulation. Plain Language Summary The El Nino-Southern Oscillation (ENSO) is one of the most important drivers of extreme weather and climate events on Earth. Achieving a realistic ENSO, which is critical for accurate climate predictions and projections, has been a challenge for many climate models. For example, the ACCESS-CM2, one of the latest state-of-the-art climate models contributing to the sixth IPCC report, is found to only generate a quasi-biennial ENSO, failing to reproduce the observed dominant 3-7 year periodicities. Here, we show that the problem is at least partly due to the model's persistent and extensive tropical Atlantic warm bias. Replacing the tropical Atlantic SST with the observed over the course of 50-year simulation results in a more realistic ENSO variability. This result suggests that equatorial Atlantic variability plays an important role in shaping Pacific ENSO events. Improving the model's representation of the tropical Atlantic is therefore crucial for enhancing its skill in ENSO simulation, prediction, and projection. |
| DOI | 10.1029/2021GL096887 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Centre for Southern Hemisphere Oceans Research; Australian Government |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:000751642800040 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/178012 |
| 专题 | 海洋环流与波动重点实验室 |
| 通讯作者 | Bi, Daohua; Wang, Guojian |
| 作者单位 | 1.CSIRO Oceans & Atmosphere, Ctr Southern Hemisphere Oceans Res CSHOR, Hobart, Tas, Australia 2.Ocean Univ China, Inst Adv Ocean Studies, Key Lab Phys Oceanog, Qingdao, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 4.Univ New South Wales, Australian Res Council ARC, Ctr Excellence Climate Extremes, Sydney, NSW, Australia 5.Monash Univ, Sch Earth Atmosphere & Environm, Melbourne, Vic, Australia 6.Chinese Acad Sci, CAS Key Lab Ocean Circulat & Waves, Inst Oceanol, Ctr Ocean Megasci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bi, Daohua,Wang, Guojian,Cai, Wenju,et al. Improved Simulation of ENSO Variability Through Feedback From the Equatorial Atlantic in a Pacemaker Experiment[J]. GEOPHYSICAL RESEARCH LETTERS,2022,49(2):10. |
| APA | Bi, Daohua.,Wang, Guojian.,Cai, Wenju.,Santoso, Agus.,Sullivan, Arnold.,...&Jia, Fan.(2022).Improved Simulation of ENSO Variability Through Feedback From the Equatorial Atlantic in a Pacemaker Experiment.GEOPHYSICAL RESEARCH LETTERS,49(2),10. |
| MLA | Bi, Daohua,et al."Improved Simulation of ENSO Variability Through Feedback From the Equatorial Atlantic in a Pacemaker Experiment".GEOPHYSICAL RESEARCH LETTERS 49.2(2022):10. |
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| Geophysical Research（1671KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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