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基于EEMD方法的热带太平洋海表盐度多尺度特征分析
Analysis on Multi-Scale Features of Sea Surface Salinity in Tropical Pacific Based on EEMD Method

DOI: 10.12677/AMS.2014.12009, PP. 55-62

Keywords: 集合经验模态分解,热带太平洋,海表盐度,尺度分析
Ensemble Empirical Mode Decomposition
, Tropical Pacific, Sea Surface Salinity, Scale Analysis

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Abstract:

基于热带太平洋近60年的格点海表盐度资料,利用集合经验模态分解方法分析了西太平洋暖池、南半球辐合带以及热带辐合带等三个区域的海表盐度多尺度变化特征,结果表明:西太平洋暖池和南半球辐合带的海表盐度以年际变化为主,而热带辐合带的海表盐度主要表现为季节变化。此外,年代际变化在西太平洋暖池区域较强,而在ITCZ区域很弱。
The multi-scale features in west warm pool (WP), southern pacific convergence zone (SPCZ) and inter-tropical convergence zone (ITCZ) are analyzed by using the Ensemble Empirical Mode De-composition method and lately 60-year’s sea surface salinity data. The results show that: both the sea surface salinity in the WP and SPCZ mainly show inter-annual variability, while it is dominated by annual cycle in the ITCZ. Moreover, the inter-decadal variability is relatively strong in the west warm pool but very weak in the ITCZ.

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