DOI: 10.1007/s00382-013-1862-1
Scopus记录号: 2-s2.0-84905094870
论文题名: Global warming, low-frequency variability, and biennial oscillation: An attempt to understand the physical mechanisms driving major ENSO events
作者: Yeo S.-R. ; Kim K.-Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-03-04 起始页码: 771
结束页码: 786
语种: 英语
英文关键词: Cyclostationary EOF
; ENSO
; Global modes of SST
; Global warming
英文摘要: Three primary global modes of sea surface temperature (SST) variability during the period of 1871-2010 are identified through cyclostationary empirical orthogonal function analysis. The first mode exhibits a clear trend and represents global SST warming with an 'El Niño-like' SST pattern in the tropical Pacific. The second mode is characterized by considerable low-frequency variability in both the tropical Pacific and the North Pacific regions, indicating that there is a close connection between the two regions on interannual and decadal time scales. The third mode shows a seesaw pattern between El Niño and La Niña within a two-year period; this mode is derived by the oscillatory tendency of the tropical Pacific ocean-atmosphere coupled system. A SST reconstruction based on these three modes captures a significant portion of the SST variability in the raw data, which is primarily associated with El Niño-Southern Oscillation (ENSO) events in the tropical Pacific. Additionally, this study attempts to interpret the major ENSO events that have occurred since the 1970s in terms of the interplay originating from these three modes of variability. In particular, two key points are derived from this analysis: (1) the most extreme El Niño events occurred in 1982/1983 and 1997/1998 are attributed to the positive contributions of all three modes; and (2) the central Pacific (CP) El Niño events in the 1990s and 2000s have different physical mechanisms, that is, the CP El Niño events in the early 1990s originated mainly from the low-frequency mode, while those in the early 2000s derived mainly from the global warming mode. © 2013 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54542
Appears in Collections: 过去全球变化的重建
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作者单位: School of Earth and Environmental Sciences, Seoul National University, Seoul, 151-747, South Korea
Recommended Citation:
Yeo S.-R.,Kim K.-Y.. Global warming, low-frequency variability, and biennial oscillation: An attempt to understand the physical mechanisms driving major ENSO events[J]. Climate Dynamics,2014-01-01,43(2017-03-04)