globalchange  > 气候减缓与适应
DOI: 10.1002/2017JD028064
Scopus记录号: 2-s2.0-85044525849
论文题名:
Does Extreme El Niño Have a Different Effect on the Stratosphere in Boreal Winter Than Its Moderate Counterpart?
作者: Zhou X.; Li J.; Xie F.; Chen Q.; Ding R.; Zhang W.; Li Y.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:6
起始页码: 3071
结束页码: 3086
语种: 英语
英文关键词: Extreme El Niño ; Lagged response ; Moderate El Niño ; Planetary wave ; Stratospheric circulation
Scopus关键词: air temperature ; air-sea interaction ; analytical method ; atmospheric circulation ; climate modeling ; El Nino ; extreme event ; Northern Hemisphere ; planetary wave ; polar vortex ; stratosphere ; wave propagation ; winter ; Pacific Ocean ; Pacific Ocean (East)
英文摘要: A robust impact of El Niño on the Northern Hemisphere (NH) polar stratosphere has been demonstrated by previous studies, although whether this applies to extreme El Niño is uncertain. The time evolution of the response of the NH stratospheric vortex to extreme El Niño, compared with that to moderate eastern Pacific El Niño, is addressed by means of composite analysis using the National Centers for Environmental Prediction/Department of Energy reanalysis data set from 1980 to 2016. Lead-lag analysis indicates that the El Niño signal actually leads the stratospheric response by ~2 months. Considering the time lag, the signal of December-January-February El Niño in the NH stratospheric vortex should mature in the February-March-April season (late winter/early spring). The patterns of circulation and temperature for late winter/early spring during extreme and moderate El Niño events are significant, exhibiting similar structure. The results are confirmed with the Whole Atmosphere Community Climate Model version 4 model, which is forced with observed SSTs of extreme and moderate El Niño in winter (December-January-February) to analyze the day-to-day propagation of their signals. Note that the magnitudes of the stratospheric responses are much larger in the case of extreme El Niño, as stronger upward propagation of planetary waves leads to a weaker northern polar vortex than during moderate El Niño events. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114260
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作者单位: Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, College of Atmospheric Science, Chengdu University of Information Technology, Chengdu, China; State Key Laboratory of Earth Surface Processes and Resource Ecology and College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Zhou X.,Li J.,Xie F.,et al. Does Extreme El Niño Have a Different Effect on the Stratosphere in Boreal Winter Than Its Moderate Counterpart?[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(6)
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