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

作者: 黎 鑫 , 卢 扬 :解放军理工大学气象海洋学院,南京; 陈 建 :解放军总参大气环境研究所,北京; 郑崇伟 :海军大连舰艇学院,大连;

关键词: 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

摘要:
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。

Abstract: 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.

文章引用: 黎 鑫 , 陈 建 , 卢 扬 , 郑崇伟 (2014) 基于EEMD方法的热带太平洋海表盐度多尺度特征分析。 海洋科学前沿, 1, 55-62. doi: 10.12677/AMS.2014.12009

参考文献

[1] Gouriou, Y. and Delcroix, T. (2002) Seasonal and ENSO variations of sea surface salinity and temperature in the South Pacific Convergence Zone during 1976-2000. Journal of Geophysical Research, 107, 8011.

[2] Delcroix, T., Cravatte, S. and McPhaden, M.J. (2007) Decadal variations and trends in tropical Pacific sea surface salinity since 1970. Journal of Geophysical Research, 112, Article ID: C03012.

[3] Giese, B.S. and James, A.C. (1999) Interannual and decadal variability in the tropical and midlatitude Pacific Ocean. Journal of Climate, 12, 3402-3418.

[4] Lau, K.M. and Weng, H. (1999) Interannual, decadal-interdecadal, and global warming signals in sea surface temperature during 1955-97. Journal of Climate, 12, 1257-1267.

[5] Barbosa, S.M. and Andersen, O.B. (2009) Trend patterns in global sea surface temperature. International Journal of Climatology, 29, 2049-2055.

[6] Thompson, D.W.J., Wallace, J.M., Jones, P.D. and Kennedy, J.J. (2009) Identifying signatures of natural climate variability in time series of global-mean surface temperature: Methodology and insights. Journal of Climate, 22, 6120- 6141.

[7] Compo, G.P. and Sardeshmukh, P.D. (2010) Removing ENSO-related variations from the climate record. Journal of Climate, 23, 1957-1978.

[8] Singh, A. and Delcroix, T. (2011) Estimating the effects of ENSO upon the observed freshening trends of the western tropical Pacific Ocean. Geophysical Research Letters, 38, Article ID: L21607.

[9] Wu, Z., Huang, N.E., Long, S.R. and Peng, C.K. (2007) On the trend, detrending, and the variability of nonlinear and nonstationary time series. Proceedings of the National Academy of Sciences of the USA, 104, 14889-14894.

[10] Wu, Z. and Huang, N.E. (2009) Ensemble empirical mode decomposition: A noise-assisted data analysis method. Advances in Adaptive Data Analysis, 1, 1-41.

[11] Qian, C., Wu, Z., Fu, C. and Wang, D. (2011) On changing El Niño: A view from time-varying annual cycle, interannual variability, and mean state. Journal of Climate, 24, 6486-6499.

[12] Qian, C., Wu, Z. and Yan, Z. (2011) The role of changes in the annual cycle in earlier onset of climatic spring in northern China. Advances in Atmospheric Sciences, 28, 284-296.

[13] Delcroix, T., Alory, G., Cravatte, S., Corrège, T. and McPhaden, M. (2011) A gridded sea surface salinity data set for the tropical Pacific with sample applications (1950-2008). Deep Sea Research Part I, 58, 38-48.

[14] Huang, N.E., Shen, Z., Long, S.R., Wu, M.C., Shih, E.H., Zheng, Q., Tung, C.C. and Liu, H.H. (1998) The empirical mode decomposition and the Hilbert spectrum for nonlinear and nonstationary time series analysis. Proceedings of the Royal Society of London, 454A, 903-995.

[15] Qian, C., Wu, Z., Fu, C. and Zhou, T. (2010) On multi-timescale variability of temperature in China in modulated annual cycle reference frame. Advances in Atmospheric Sciences, 27, 1169-1182.

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