globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00382-017-3846-z
Scopus记录号: 2-s2.0-85026768135
论文题名:
Divergent El Niño responses to volcanic eruptions at different latitudes over the past millennium
作者: Liu F.; Li J.; Wang B.; Liu J.; Li T.; Huang G.; Wang Z.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期:2018-09-10
起始页码: 3799
结束页码: 3812
语种: 英语
英文关键词: Divergent El Niño responses ; ENSO ; Northern Hemisphere volcanic eruptions ; Reconstruction ; Southern Hemisphere volcanic eruptions ; Tree ring
Scopus关键词: El Nino ; El Nino-Southern Oscillation ; global warming ; Northern Hemisphere ; radiative forcing ; reconstruction ; Southern Hemisphere ; tree ring ; volcanic eruption
英文摘要: Detection and attribution of El Niño-Southern Oscillation (ENSO) responses to radiative forcing perturbation are critical for predicting the future change of ENSO under global warming. One of such forcing perturbation is the volcanic eruption. Our understanding of the responses of ENSO system to explosive tropical volcanic eruptions remains controversial, and we know little about the responses to high-latitude eruptions. Here, we synthesize proxy-based ENSO reconstructions, to show that there exist an El Niño-like response to the Northern Hemisphere (NH) and tropical eruptions and a La Niña-like response to the Southern Hemisphere (SH) eruptions over the past millennium. Our climate model simulation results show good agreement with the proxy records. The simulation reveals that due to different meridional thermal contrasts, the westerly wind anomalies can be excited over the tropical Pacific to the south of, at, or to the north of the equator in the first boreal winter after the NH, tropical, or SH eruptions, respectively. Thus, the eastern-Pacific El Niño can develop and peak in the second winter after the NH and tropical eruptions via the Bjerknes feedback. The model simulation only shows a central-Pacific El Niño-like response to the SH eruptions. The reason is that the anticyclonic wind anomaly associated with the SH eruption-induced southeast Pacific cooling will excite westward current anomalies and prevent the development of eastern-Pacific El Niño-like anomaly. These divergent responses to eruptions at different latitudes and in different hemispheres underline the sensitivity of the ENSO system to the spatial structure of radiative disturbances in the atmosphere. © 2017, Springer-Verlag GmbH Germany.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109332
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Earth System Modeling Center and Climate Dynamics Research Center, Nanjing University of Information Science and Technology, Nanjing, China; Department of Geography, University of Hong Kong, Pokfulam, Hong Kong; Department of Atmospheric Sciences and Atmosphere-Ocean Research Center, University of Hawaii at Manoa, Honolulu, HI 96825, United States; Key Laboratory of Virtual Geographic Environment of Ministry of Education, School of Geography Science, Nanjing Normal University, Nanjing, 210023, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China

Recommended Citation:
Liu F.,Li J.,Wang B.,et al. Divergent El Niño responses to volcanic eruptions at different latitudes over the past millennium[J]. Climate Dynamics,2018-01-01,50(2018-09-10)
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