Spatial and temporal variation characteristics of ocean waves in the South China Sea during the boreal winter

ZHU Geli; LIN Wantao; ZHAO Sen; CAO Yanhua

doi:10.1007/s13131-015-0592-0

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Article Navigation > Acta Oceanologica Sinica > 2015 > 34(1): 23-28

ZHU Geli, LIN Wantao, ZHAO Sen, CAO Yanhua. Spatial and temporal variation characteristics of ocean waves in the South China Sea during the boreal winter[J]. Acta Oceanologica Sinica, 2015, 34(1): 23-28. doi: 10.1007/s13131-015-0592-0

Citation:

ZHU Geli, LIN Wantao, ZHAO Sen, CAO Yanhua. Spatial and temporal variation characteristics of ocean waves in the South China Sea during the boreal winter[J]. Acta Oceanologica Sinica, 2015, 34(1): 23-28. doi: 10.1007/s13131-015-0592-0

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Spatial and temporal variation characteristics of ocean waves in the South China Sea during the boreal winter

doi: 10.1007/s13131-015-0592-0

1.
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;Department of Mathematics and Physics, North China Electric Power University, Beijing 102206, China
2.
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
3.
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;University of Chinese Academy of Sciences, Beijing 100049, China
4.
Department of Mathematics and Physics, North China Electric Power University, Beijing 102206, China

Received Date: 2014-04-09
Rev Recd Date: 2014-07-04

Abstract

Abstract

The spatial and temporal variation characteristics of the waves in the South China Sea (SCS) in the boreal winter during the period of 1979/1980-2011/2012 have been investigated based on the European Centre for Medium-range Weather Forecasts interim (ERA-Interim) reanalysis dataset. The results show that the leading mode of significant wave height anomalies (SWHA) in the SCS exhibits significant interannual variation and a decadal shift around the mid-1990s, and features a basin-wide pattern in the entire SCS with a center located in the west of the Luzon Strait. The decadal change from a weak regime to a strong regime is mainly associated with the enhancement of winter monsoon modulated by the Pacific decadal oscillation (PdO). The interannual variation of the SWHA has a significant negative correlation with the El Niño Southern Oscillation (ENSO) in the same season and the preceding autumn. For a better understanding of the physical mechanism between the SCS ocean waves and ENSO, further investigation is made by analyzing atmospheric circulation. The impact of the ENSO on the SWHA over the SCS is bridged by the East Asian winter monsoon and Pacific-East Asian teleconnection in the lower troposphere. during the El Niño (La Niña), the anomalous Philippine Sea anticyclone (cyclone) dominates over the Western North Pacific, helps to weaken (enhance) East Asian winter monsoon and then emerges the negative (positive) SWHA in the SCS.
- ocean waves,
- interannual variability,
- South China Sea,
- ENSO,
- PdO

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