气候变化领域集成服务门户(CCPortal): Causal effects of Indian Ocean Dipole on El Niño-Southern Oscillation during 1950-2014 based on high-resolution models and reanalysis data

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DOI	10.1088/1748-9326/abb96d
	Causal effects of Indian Ocean Dipole on El Niño-Southern Oscillation during 1950-2014 based on high-resolution models and reanalysis data
	Le T.; Ha K.-J.; Bae D.-H.; Kim S.-H.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	Uncertainty exists regarding the interaction between the El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) where ENSO is normally expected to be the leading mode. Moreover, the effect of global warming on the relationship between these two modes remains unexplored. Therefore, we investigated the ENSO-IOD linkage for the years 1950-2014 using reanalysis data and high-resolution climate model simulations. The 1950-2014 period is of particular interest as rapid Indian Ocean warming since the 1950s has had a huge impact worldwide. Our results showed that the IOD had robust causal effects on ENSO, whereas the impact of ENSO on IOD exhibited lower confidence. All models demonstrated that the IOD was unlikely to have no causal effects on ENSO, whereas eight out of 15 studied models and the reanalysis data showed significant causal effects at the 10% significance level. The analyses provide new evidence that ENSO interannual variability might be forced by changes in Indo-Pacific Walker circulation induced by the IOD. Weak control of ENSO on the IOD is likely due to nonsignificant effects of ENSO on the western tropical Indian Ocean, implying that the rapid warming environment in the Indian Ocean may fundamentally modulate the relationship between the IOD and ENSO. We find high agreement between the models and reanalysis data in simulating the ENSO-IOD connection. These results indicate that the effects of the IOD on ENSO might be more significant than previously thought. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	causal effects; CMIP6; El Niño-Southern Oscillation; high-resolution climate model; Indian Ocean Dipole
语种	英语
scopus关键词	Atmospheric pressure; Global warming; Oceanography; High resolution climate model; High-resolution models; Indian Ocean dipole; Indian ocean dipoles; Interannual variability; Significance levels; Southern oscillation; Tropical Indian ocean; Climate models; data set; El Nino-Southern Oscillation; Indian Ocean Dipole; model; spatiotemporal analysis; Pomatiopsis californica
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153564
作者单位	Department of Civil and Environmental Engineering, Sejong University, Seoul, South Korea; Center for Climate Change Adaptation for Water Resources, Sejong University, Seoul, South Korea; Center for Climate Physics, Institute for Basic Science, Busan, South Korea; Research Center for Climate Sciences, Department of Atmospheric Sciences, Pusan National University, Busan, South Korea
推荐引用方式 GB/T 7714	Le T.,Ha K.-J.,Bae D.-H.,et al. Causal effects of Indian Ocean Dipole on El Niño-Southern Oscillation during 1950-2014 based on high-resolution models and reanalysis data[J],2020,15(10).
APA	Le T.,Ha K.-J.,Bae D.-H.,&Kim S.-H..(2020).Causal effects of Indian Ocean Dipole on El Niño-Southern Oscillation during 1950-2014 based on high-resolution models and reanalysis data.Environmental Research Letters,15(10).
MLA	Le T.,et al."Causal effects of Indian Ocean Dipole on El Niño-Southern Oscillation during 1950-2014 based on high-resolution models and reanalysis data".Environmental Research Letters 15.10(2020).