Pacific sea level variations and its factors

GU Xiao-li; LI Pei-liang

Volume 31 Issue 1

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GU Xiao-li, LI Pei-liang. Pacific sea level variations and its factors[J]. Haiyang Xuebao, 2009, 31(1): 28-36.

Citation:

GU Xiao-li, LI Pei-liang. Pacific sea level variations and its factors[J]. Haiyang Xuebao, 2009, 31(1): 28-36.

GU Xiao-li, LI Pei-liang. Pacific sea level variations and its factors[J]. Haiyang Xuebao, 2009, 31(1): 28-36.

Citation:

GU Xiao-li, LI Pei-liang. Pacific sea level variations and its factors[J]. Haiyang Xuebao, 2009, 31(1): 28-36.

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Pacific sea level variations and its factors

Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China

Received Date: 2008-08-18
Rev Recd Date: 2008-12-30

Abstract

Abstract

Decomposing monthly sea level data at tide g auges along the coast of the Pacific Ocean in the EMD method,and combining with other data,the Pacific Ocean sea level's interannual and decadal oscillation were in vestigatel,as well as information on the sea level trends. Overall,the Pacific Ocean coastal sea level rises,with an average rate in 1.4mm/a,and shows highly non-uniform properties in geography. There are obvious interannual and decadal variability at the Pacific sea level. The interannual variations of the Pacific Ocean sea level oscillations are significantly affected by the ENSO. In the east Pacific Ocean the interannual sea level variability and Nino3 index are positive correlation,while negative correlations in the west Pacific Ocean. The correlation between both is significant in the tropical Pacific Ocean,and the correlation is weakened with latitude increasing. At different areas this correlation coefficient is different. In the west(east)Pacific Ocean sea level decadal variation performs significant negative(positive)correlation with the PDO index overall. The correlation between them is non-uniform geographically and evolves with time. Sea level decadal changes could lead to exactly the opposite sea level trend,due to decadal variation directim pact on the trends.
- sea level variations,
- interannual variation,
- decadal oscillation,
- ENSO

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