Abstract
The climate modulation on the sea surface height (SSH) in China seas is investigated using a China Ocean Reanalysis (CORA) dataset from 1958–2008. The dataset is constructed by assimilating the temperature/salinity profiles derived from the satellite altimetry data and historical observational temperature/salinity profiles. Based on the Empirical Orthogonal Function (EOF), the CORA sea surface height anomaly (SSHa) is decomposed, and the interannual and decadal variability of the first three leading modes are analyzed. On the interannual timescale, the first principal component (PC1) is significant positively correlated with the El Niño/Southern Oscillation (ENSO). On the decadal timescale, North Pacific Gyre Oscillation (NPGO) has significant negative correlation with PC1 whereas Pacific Decadal Oscillation (PDO) is in phase with PC3. Analysis shows that the decadal variability of SSH is mainly modulated by the wind stress curl variability related to the NPGO and PDO. In addition, the effect of net heat flux associated to the NPGO and PDO on SSH is also investigated, with net heat flux variability in the Luzon strait and tropic Pacific found to influence the decadal variability of SSH.
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Supported by the National Basic Research Program of China (973 Program) (No. 2013CB430304), the National Natural Science Foundation of China (Nos. 41176003, 41206178, 41376013, 41376015, 41306006), the National High Technology Research and Development Program of China (863 Program) (No. 2013AA09A505), and the Global Change and Air-Sea Interaction of China (No. GASI-01-01-12)
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Zhang, X., Wang, X., Cao, Y. et al. Climate modulation on sea surface height in China seas. Chin. J. Ocean. Limnol. 33, 1245–1255 (2015). https://doi.org/10.1007/s00343-015-4120-z
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DOI: https://doi.org/10.1007/s00343-015-4120-z