Abstract
The spatio-temporal variations of the significant wave height (SWH) in the Western North Pacific and South China Sea (WNP-SCS) region, as well as their driving mechanisms, are investigated based on the long-term (1981–2014) simulation by a coupled ocean–atmosphere model and a WAVEWATCH III model. The Empirical Orthogonal Function modes of SWH anomalies show different patterns in the cold and warm seasons. In winter, the first mode (explaining 40.63% of the variance) shows a monopole pattern with large loadings lying in SCS and the WNP to the east of the Philippine Islands, which is primarily associated with the El Niño-Southern Oscillation (ENSO) on inter-annual time scales. The second mode (explaining 19.62% of the variance) shows a dipole pattern with negative loadings in the northeastern SCS and positive loadings to the east of Japan, which is prominently connected with the intensity variation and longitudinal shift of Aleutian Low on decadal time scales. In summer, the first leading mode (explaining 73.47% of the variance) presents large loadings located mainly in the WNP region between 10° N and 30° N and secondarily in the central SCS, which is associated with the ENSO-affected tropical cyclone activities and South China Sea summer monsoon, respectively.
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Acknowledgements
This work was jointly supported by the National Key Research and Development Program (Grant no. 2018YFC1406206), the Major projects of the National Natural Science Foundation of China (Grant nos. 41890851 and 41931182), Guangdong Special Support Program (Grant no. 2019BT2H594), Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (Grant no. GML2019ZD0303), the National Natural Science Foundation of China (Grant nos. 41606007, 41676016 and 41776028), Strategic Priority Research Program of the Chinese Academy of Sciences (Grant nos. XDA15020901, XDA13030103 and XDA19060503) and Chinese Academy of Sciences (Grant nos. ZDRW-XH-2019-2, ISEE2018PY05 and 133244KYSB20180029). The authors gratefully acknowledge the use of the HPCC at the South China Sea Institute of Oceanology, Chinese Academy of Sciences and the buoys observation from the National Ocean Technology Center. Thanks also to the graphic software packages, i.e., MATLAB, which were employed to plot the figures.
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Li, S., Li, Y., Peng, S. et al. The inter-annual variations of the significant wave height in the Western North Pacific and South China Sea region. Clim Dyn 56, 3065–3080 (2021). https://doi.org/10.1007/s00382-021-05636-9
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DOI: https://doi.org/10.1007/s00382-021-05636-9