TROPICAL GEOGRAPHY ›› 2016, Vol. 36 ›› Issue (1): 34-40.doi: 10.13284/j.cnki.rddl.002797

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The Negative Correlation between SST of the Northern South China Sea and the Strength of EASM on Inter-Annual and Inter-Decadal Time Scale

ZHANG Huiling1,2,YU Kefu2,3,SHI Qi2,YAN Hongqiang2,CHEN Tegu2   

  1. (1.Department of Ocean Engineering,Faculty of Engineering,Guangdong Ocean University,Zhanjiang 524088,China; 2.Key Laboratory of Marginal Sea Geology,South China Sea Institute of Oceanology,Chinese Academy of Sciences, Guangzhou 510301,China;3.School of Ocean,Guanxi University,Nanning 530004,China)
  • Online:2016-01-05 Published:2016-01-05

Abstract: Based on comparison of band-SST of Porites from Northern South China Sea and δ18O records from Wanxiang Cave, Gansu province and Dongge Cave, Guizhou province, this paper revealed the relationship between SST of the Northern South China Sea and strength of East Asian Summer Monsoon (EASM). On inter-annual and inter-decadal time scale, there is a negative correlation between SST of the Northern South China Sea and the strength of EASM. When SST rises, the value of stable oxygen isotope becomes heavier and the strength of EASM weakens, and vice versa. The comparison of instrument-measured SST and δ18O record from stalagmite WX42B, Wanxiang Cave verified the relationship. ENSO influences the rainfall of the monsoon region and controls the SST of the Northern South China Sea. ENSO may directly result in the negative correlation between SST of the Northern South China Sea and the strength of EASM. But the relationship between ENSO and rainfall of the monsoon region is complicated, the relationship between SST of the Northern South China Sea and local monsoon regions still needs further study.

Key words: the Northern South China Sea, band-SST, δ18O, strength of East Asian summer monsoon, ENSO