Low-frequency variation in sea level in the tropical Pacific

Lu Qing; Zuo Juncheng; Wu Lingjun

doi:10.3969/j.issn.0253-4193.2017.07.005

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Lu Qing, Zuo Juncheng, Wu Lingjun. Low-frequency variation in sea level in the tropical Pacific[J]. Haiyang Xuebao, 2017, 39(7): 43-52. doi: 10.3969/j.issn.0253-4193.2017.07.005

Citation:

Lu Qing, Zuo Juncheng, Wu Lingjun. Low-frequency variation in sea level in the tropical Pacific[J]. Haiyang Xuebao, 2017, 39(7): 43-52. doi: 10.3969/j.issn.0253-4193.2017.07.005

Lu Qing, Zuo Juncheng, Wu Lingjun. Low-frequency variation in sea level in the tropical Pacific[J]. Haiyang Xuebao, 2017, 39(7): 43-52. doi: 10.3969/j.issn.0253-4193.2017.07.005

Citation:

Lu Qing, Zuo Juncheng, Wu Lingjun. Low-frequency variation in sea level in the tropical Pacific[J]. Haiyang Xuebao, 2017, 39(7): 43-52. doi: 10.3969/j.issn.0253-4193.2017.07.005

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Low-frequency variation in sea level in the tropical Pacific

doi: 10.3969/j.issn.0253-4193.2017.07.005

1.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
Marine Science and Technology College, Zhejiang Ocean University, Zhoushan 316000, China
3.
Wentian College, Hohai University, Maanshan 243031, China

Received Date: 2016-11-27
Rev Recd Date: 2017-03-16

Abstract

Abstract

The ECMWF ORAS4 reanalysis is used to study the low-frequency variation in sea level in the tropical Pacific in this paper. The first mode of interannual sea level variation in the tropical Pacific reflects the burst of El Niño. The sea level change in the tropical eastern Pacific is opposite to that in the tropical western Pacific, and the principal component of the first mode is highly correlated with the Niño3.4 index. The second mode shows the warm water transport process during the El Niño. The locations where the warm water gathered in before El Niño, and the positions where the warm water started to transport to high latitude are different in the two types of El Niño events. Besides, there is a remarkable decadal change in the cycles of ENSO, and this is linked with the decadal variation in the tropical Pacific. The sea level trends are also affected by the decadal variation. The high rise (descend) rate after 1993 that observed by altimeter is caused by the phase-switching.
- tropical Pacific,
- sea level,
- interannual variation,
- decadal change,
- trend

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References(36)

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