| Sea surface temperature variations in the southwestern South China Sea over the past 160 ka |
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| 作者姓名： | XIE Hongqin JIA Guodong PENG Ping'an SHAO Lei |
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| 作者单位： | XIE Hongqin1，JIA Guodong1，PENG Ping’an1，SHAO Lei21. State Key Laboratory of Organic Geochemistry，Guangzhou Institute of Geochemistry，Chinese Academy of Sciences，Guangzhou 510640，China2. State Key Laboratory of Marine Geology，Tongji University，Shanghai 200092，China |
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| 摘 要： | Sea surface temperatures (SSTs) in the southwestern South China Sea have been reconstructed for the past 160 ka using the Uk37 paleothermometer from the core MD01-2392. The temperature differences between glacial times (MISs 6 and 2) and interglacial times (MISs 5.5 and 1) are 2.2~2.5 ℃. Younger Dryas event during the last deglaciation was documented in both the planktonic foraminiferal δ18O and SST records. After MIS 5.5, SSTs displayed a progressive cooling from 28.6 to 24.5 ℃, culminating at the LGM. During this gradual cooling period, warm events such as MISs 5.3, 5.1 and 3 were also clearly documented. By comparison of SST between the study core and Core 17954, a pattern of low or no meridional SST gradients during the interglacial periods and high meridional SST gradients during the glacial periods was exhibited. This pattern indicates the much stronger East Asian winter monsoon at the glacial than at the interglacial periods. Spectral analysis gives two prominent cycles: 41 and 23 ka, with the former more pronounced, suggesting that SSTs in the southern SCS varied in concert with high-latitude processes through the connection of East Asian winter monsoon.
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| 关 键 词： | 南海西南部 海面温度变化 第四季晚期 东亚季风 |
| 收稿时间： | 2006-05-15 |
| 修稿时间： | 2006-11-10 |
Sea surface temperature variations in the southwestern South China Sea over the past 160 ka |
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| XIE Hongqin,JIA Guodong,PENG Ping''an,SHAO Lei.Sea surface temperature variations in the southwestern South China Sea over the past 160 ka[J].Acta Oceanologica Sinica,2007,26(2):49-55. |
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| Authors: | XIE Hongqin JIA Guodong PENG Ping'an and SHAO Lei |
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| Institution: | 1.State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China2.State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China |
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| Abstract: | Sea surface temperatures (SSTs) in the southwestern South China Sea have been reconstructed for the past 160 ka using the Uk37 paleothermometer from the core MD01 - 2392. The temperature differences between glacial times ( MISs 6 and 2) and interglacial times ( MISs 5.5 and 1) are 2.2 ～ 2.5 °C. Younger Dryas event during the last deglaciation was documented in both the planktonic foraminiferal δ18O and SST records. After MIS 5.5, SSTs displayed a progressive cooling from 28.6 to 24.5 °C, culminating at the LGM. During this gradual cooling period, warm events such as MISs 5.3, 5.1 and 3 were also clearly documented. By comparison of SST between the study core and Core 17954, a pattern of low or no meridional SST gradients during the interglacial periods and high meridional SST gradients during the glacial periods was exhibited. This pattern indicates the much stronger East Asian winter monsoon at the glacial than at the interglacial periods. Spectral analysis gives two prominent cycles:41 and 23 ka, with the former more pronounced, suggesting that SSTs in the southern SCS varied in concert with high-latitude processes through the connection of East Asian winter monsoon. |
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| Keywords: | sea surface temperature alkenone Late Quaternary South China Sea East Asian monsoon |
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