The relation between the spatial-temporal evolution of SST in the South China Sea and the earlier or later onset of the South China Sea summer monsoon

Qi Qinghua; Cai Rongshuo

doi:10.3969/J.ISSN.0253-4193.2014.03.010

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Qi Qinghua, Cai Rongshuo. The relation between the spatial-temporal evolution of SST in the South China Sea and the earlier or later onset of the South China Sea summer monsoon[J]. Haiyang Xuebao, 2014, 36(3): 94-103. doi: 10.3969/J.ISSN.0253-4193.2014.03.010

Citation:

Qi Qinghua, Cai Rongshuo. The relation between the spatial-temporal evolution of SST in the South China Sea and the earlier or later onset of the South China Sea summer monsoon[J]. Haiyang Xuebao, 2014, 36(3): 94-103. doi: 10.3969/J.ISSN.0253-4193.2014.03.010

Citation:

Qi Qinghua, Cai Rongshuo. The relation between the spatial-temporal evolution of SST in the South China Sea and the earlier or later onset of the South China Sea summer monsoon[J]. Haiyang Xuebao, 2014, 36(3): 94-103. doi: 10.3969/J.ISSN.0253-4193.2014.03.010

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The relation between the spatial-temporal evolution of SST in the South China Sea and the earlier or later onset of the South China Sea summer monsoon

doi: 10.3969/J.ISSN.0253-4193.2014.03.010

The Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China;Key Laboratory of Global Change and Marine-Atmospheric Chemistry, State Oceanic Administration, Xiamen 361005, China

Received Date: 2013-01-04
Rev Recd Date: 2013-12-10

Abstract

Abstract

Spatio-temporal variations of the sea temperature anomaly in the South China Sea (SCS) were investigated based on the reanalysis dataset of China seas from 1986 to 2003. With focus on the evolution of the sea surface temperature anomaly(SSTA) before and after (during April to Jun) the onset of the SCS summer monsoon (SCSSM), its relation with the occasion of the SCSSM onsets was discussed. The results show that, there exists a significant evolution mode on seasonal scale, in which the positive SSTA develops firstly near the sea area west of Palawan in April, and extends rapidly westward and northward in May when the positive SSTA controls the most part of the SCS, and then the SSTA in the SCS achieves a negative-positive phase transition in June. The analysis indicates that, the interannual difference of the SSTA evolution mode was associated significantly with the earlier or later onset of the SCSSM. Synthesizing with the previous studies, it is considered that the anomalous thermal evolution (including trends,speed,magnitude) on intra-seasonal scale in the sea surface of the SCS could be one of important factors to impact earlier and later onset of the SCSSM. According to this, the author established a temperature difference index based on the SSTA evolution in the SCS, which reflects well to the earlier and later onset of the SCSSM. In addition, the evolution of the SSTA can be related closely with the variation of the SCS warm pool (SCSWP). It is found that the SST difference (April-May) anomaly of the SCSWP during the period before the onset of the SCSSM was striking of positive correlation with that of the Indian Ocean warm pool (IOWP), while evident negative relation with that of the Western Pacific warm pool (WPWP). Under the background of formation of the surface thermal pattern and contrast in Indio-Pacific warm pool regions, the anomalous intra-seasonal evolution of the SSTA in the SCS is expected to give rise to the interannual difference of the SCSSM onset (earlier or later) through the thermal effect on the large scale of meridional and zonal atmospheric current anomalies.
- South China Sea,
- intra-seasonal spatio-temporal evolution,
- difference in sea surface temperature,
- South China Sea summer monsoon,
- interanuual anomaly

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References(32)

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