Analysis of the temporal and spatial variations in the wind and wave over the South China Sea

QIU Sha-yi; LIANG Chu-jin; DONG Chang-ming; LIU Zheng-li

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Journal of Marine Sciences ›› 2013, Vol. 31 ›› Issue (4) : 1-9.

Analysis of the temporal and spatial variations in the wind and wave over the South China Sea

QIU Sha-yi^1,2, LIANG Chu-jin^*1,2, DONG Chang-ming³, LIU Zheng-li⁴

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Abstract

Based on satellite remote sensing products, the seasonal and interannual variations in the wind and wave over the South China Sea (SCS) were presented in the study. A vector empirical orthogonal function (VEOF) method was employed to study the temporal and spatial patterns of the wind field. Results indicate that the first VEOF is a seasonal oscillation mode, which represents the monsoon feature in the SCS. The second VEOF is an approximate annual oscillation mode, it represents the wind field features during the monsoon transition period. The third VEOF shows that the wind field is the land-sea interaction mode. For SWH, an empirical orthogonal function (EOF) method was employed and the similar two modes are forced by the first two modes of wind data, the third mode is caused by the bottom topography variation. The correlation coefficient (CC) between wind field's first mode and SWH's first mode is 0.76, which shows that the wave variation is forced by the sea surface wind. The two third modes are nearly unconnected, there may be a link between the bottom topography and SWH's third mode.

Key words

South China Sea / wind field / significant wave height / satellite remote sensing

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QIU Sha-yi, LIANG Chu-jin, DONG Chang-ming, LIU Zheng-li. Analysis of the temporal and spatial variations in the wind and wave over the South China Sea[J]. Journal of Marine Sciences. 2013, 31(4): 1-9

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