globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-014-2148-y
Scopus记录号: 2-s2.0-84905098146
论文题名:
Interannual variability of the South Pacific Ocean in observations and simulated by the NCEP Climate Forecast System, version 2
作者: Guan Y.; Huang B.; Zhu J.; Hu Z.-Z.; Kinter III J.L.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期:2017-03-04
起始页码: 1141
结束页码: 1157
语种: 英语
英文关键词: Air-sea interaction ; CFSv2 ; ENSO ; Southern hemisphere atmospheric circulation ; Southern subtropical Pacific Dipole mode
英文摘要: The mechanism of the South Pacific Ocean Dipole (SPOD) mode is examined, using a 50-year simulation of the Climate Forecast System, version 2 (CFSv2) and 50-year observation-based ocean-atmosphere analyses (1961-2010). It is shown that the SPOD, a sea surface temperatures (SST) seesaw between the subtropics and extratropics, is the dominant mode of the interannual variability in the South Pacific in both observations and CFSv2 simulation. CFSv2 also reproduces the seasonal phase-locking of the observed SPOD, with the anomaly pattern developing in austral spring, peaking in summer, and decaying in autumn. Composite analyses based on both observational and model data suggest that in the warm phase of SPOD, positive SST anomaly (SSTA) is initiated by weakened westerly winds over the central South Pacific in austral spring, which suppress the surface evaporative heat loss and reduce the oceanic mixed layer depth, both contributing to the SST warming. The wind-SST-mixed layer anomalies then evolve coherently over the next two seasons while the cold SSTA develops to the north. The wind perturbations are in turn a response to El Niño-Southern Oscillation (ENSO), which forces an atmospheric planetary wave train, the Pacific-South American pattern, emanating from an anomalous heat source in the tropical western Pacific. Moreover, SPOD is significantly correlated with the southern annular mode (SAM) while the latter is also significantly correlated with the ENSO index. This suggests that ENSO's influence on the SPOD may be partially conveyed through SAM. © 2014 Springer-Verlag Berlin Heidelberg.
资助项目: NSFC, National Natural Science Foundation of China ; NSFC, National Natural Science Foundation of China ; NSFC, National Natural Science Foundation of China ; NSF, National Natural Science Foundation of China ; NOAA, National Natural Science Foundation of China ; NASA, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54520
Appears in Collections:过去全球变化的重建

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作者单位: School of Mathematics and Statistics, Center for Data Assimilation Research and Application, Nanjing University of Information Science and Technology, Nanjing, China; Center for Ocean-Land-Atmosphere Studies, Institute of Global Environment and Society, Fairfax, VA, United States; Department of Atmospheric, Oceanic, and Earth Sciences, Mail Stop 6C5, George Mason University, 4400 University Drive, Fairfax, VA, 22030, United States; Climate Prediction Center, National Centers for Environmental Prediction/NOAA, College Park, MD, United States

Recommended Citation:
Guan Y.,Huang B.,Zhu J.,et al. Interannual variability of the South Pacific Ocean in observations and simulated by the NCEP Climate Forecast System, version 2[J]. Climate Dynamics,2014-01-01,43(2017-03-04)
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