IOCAS-IR  > 海洋环流与波动重点实验室
Ocean Processes Affecting the Twenty-First-Century Shift in ENSO SST Variability
Guan, Cong1,2,3; McPhaden, Michael J.3
2016-10-01
发表期刊JOURNAL OF CLIMATE
卷号29期号:19页码:6861-6879
文章类型Article
摘要Sea surface temperature (SST) variability associated with El Nino-Southern Oscillation (ENSO) slightly increased in the central Pacific Ocean but weakened significantly in the eastern Pacific at the beginning of twenty-first century relative to 1980-99. This decadal shift led to the greater prominence central Pacific (CP) El Nino events during the 2000s relative to the previous two decades, which were dominated by eastern Pacific (EP) events. To expand upon previous studies that have examined this shift in ENSO variability, temperature and temperature variance budgets are examined in the mixed layer of the Nino-3 (5 degrees S-5 degrees N, 150 degrees-90 degrees W) and Nino-4 (5 degrees S-5 degrees N, 160 degrees E-150 degrees W) regions from seven ocean model products spanning the period 1980-2010. This multimodel-product-based approach provides a robust assessment of dominant mechanisms that account for decadal changes in two key index regions. A temperature variance budget perspective on the role of thermocline feedbacks in the ENSO cycle based on recharge oscillator theory is also presented. As found in previous studies, thermocline and zonal advective feedbacks are the most important positive feedbacks for generating ENSO SST variance, and thermodynamic damping is the largest negative feedback for damping ENSO variance. Consistent with the shift toward more CP El Ninos after 2000, thermocline feedbacks experienced a substantial reduction from 1980 to 1999 and into the 2000s, while zonal advective feedbacks were less affected. Negative feedbacks likewise weakened after 2000, particularly thermal damping in the Nino-3 region and the nonlinear sink of variance in both regions.
DOI10.1175/JCLI-D-15-0870.1
收录类别SCI
语种英语
WOS记录号WOS:000384148000002
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/135894
专题海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.NOAA, Pacific Marine Environm Lab, 7600 Sand Point Way Ne, Seattle, WA 98115 USA
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Guan, Cong,McPhaden, Michael J.. Ocean Processes Affecting the Twenty-First-Century Shift in ENSO SST Variability[J]. JOURNAL OF CLIMATE,2016,29(19):6861-6879.
APA Guan, Cong,&McPhaden, Michael J..(2016).Ocean Processes Affecting the Twenty-First-Century Shift in ENSO SST Variability.JOURNAL OF CLIMATE,29(19),6861-6879.
MLA Guan, Cong,et al."Ocean Processes Affecting the Twenty-First-Century Shift in ENSO SST Variability".JOURNAL OF CLIMATE 29.19(2016):6861-6879.
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