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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
ISSN0094-8276
卷号49期号:2页码:10
通讯作者Bi, Daohua(dave.bi@csiro.au) ; Wang, Guojian(guojian.wang@csiro.au)
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.
DOI10.1029/2021GL096887
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
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
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
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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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