3-D spatial structure and temporal evolution features of PDO

CHEN Xing-rong; WANG Zhang-gui; CHAO Ji-ping; CAI Yi

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CHEN Xing-rong, WANG Zhang-gui, CHAO Ji-ping, CAI Yi. 3-D spatial structure and temporal evolution features of PDO[J]. Haiyang Xuebao, 2011, 33(6): 19-28.

Citation:

CHEN Xing-rong, WANG Zhang-gui, CHAO Ji-ping, CAI Yi. 3-D spatial structure and temporal evolution features of PDO[J]. Haiyang Xuebao, 2011, 33(6): 19-28.

CHEN Xing-rong, WANG Zhang-gui, CHAO Ji-ping, CAI Yi. 3-D spatial structure and temporal evolution features of PDO[J]. Haiyang Xuebao, 2011, 33(6): 19-28.

Citation:

CHEN Xing-rong, WANG Zhang-gui, CHAO Ji-ping, CAI Yi. 3-D spatial structure and temporal evolution features of PDO[J]. Haiyang Xuebao, 2011, 33(6): 19-28.

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3-D spatial structure and temporal evolution features of PDO

1.
Institude of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,China;National Marine Environmental Forecasting Center, Beijing 100081,China;Key Laboratory of Research on Marine Hazards Forecasting,National Marine Environmental Forecasting Center, Beijing 100081,China
2.
National Marine Environmental Forecasting Center, Beijing 100081,China;Key Laboratory of Research on Marine Hazards Forecasting,National Marine Environmental Forecasting Center, Beijing 100081,China
3.
National Marine Environmental Forecasting Center, Beijing 100081,China

Received Date: 2010-04-20
Rev Recd Date: 2010-06-13

Abstract

Abstract

Using reanalysis ocean subsurface data and 130 a(1870-1999) results of CCSM3 model of NCAR,this study examines the 3-D spatial structures and the temporal evolution of Pacific Decadal Oscillation(PDO). The results indicate the model simulates well many features of the observed North Pacific variability. Both the reanalysis data and the models results show that the pattern of PDO is not prescribed in the ocean surface, but exists in the whole top North Pacific Ocean from surface to subsurface.There is a passage of PDO signal propagation in subsurface of the North Pacific Ocean which exhibits a clockwise rotation in an association with the subtropical gyre: form the eastern North Pacific propagates west-southward to the tropical western Pacific, and then northward to the Kuroshio/Oyashio extension(KOE) region, then eastward reaching the middle of North Pacific at last, which complete a phase-changing. However, the propagation of PDO signal is not in the same depth, but is deepening gradually, and the depth is deepest when the signal reaches the middle of North Pacific at last.
- CCSM3 model,
- PDO,
- subtropical gyre

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References(47)

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