| 16 Ma以来南海北部海域古水温变化规律与机制 |
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| 引用本文： | 张红艳, 姜素华, 李三忠. 16 Ma以来南海北部海域古水温变化规律与机制[J]. 海洋地质与第四纪地质, 2013, 33(1): 91-95. doi: 10.3724/SP.J.1140.2013.01091 |
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| 作者姓名： | 张红艳 姜素华 李三忠 |
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| 作者单位： | 1. 中国海洋大学海洋地球科学学院, 青岛 266100;;; 2. 海底科学与探测技术教育部重点实验室, 青岛 266100 |
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| 基金项目： | 国家自然科学基金项目(41190072);中央高校财政南海专项联合资助项目 |
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| 摘 要： | 长期以来古海洋表层古水温研究的热点主要集中在第四纪,很少涉及到2.5 Ma之前。利用ODP 184航次1147和1148站位的获得的相关资料,并主要采用长链烯酮U37k)和底栖有孔虫氧同位素(δ18O)两种方法,计算海水氧同位素组成,然后,利用浮游有孔虫氧同位素法计算16 Ma以来的海水温度变化,探讨南海北部16 Ma以来的古海水温度变化机制。结果表明,南海北部水温总体趋势与全球气候发展相对应,在北半球冰盖形成时期,海水表层温度与代表高纬冰盖体积大小的底栖有孔虫δ18O几乎同步变化,反映出南海热带海区古气候变化的特殊性,为进一步研究低纬热带海区在全球古气候变化中的作用提供了新证据。
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| 关 键 词： | 古水温 氧同位素 长链烯酮 底栖有孔虫 南海 |
| 收稿时间： | 2012-09-20 |
| 修稿时间： | 2012-10-10 |
VARIATION OF ANCIENT WATER TEMPERATURE AND ITS MECHANISM IN THE NORTHERN SOUTH CHINA SEA SINCE 16 MA |
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| ZHANG Hongyan, JIANG Suhua, LI Sanzhong. VARIATION OF ANCIENT WATER TEMPERATURE AND ITS MECHANISM IN THE NORTHERN SOUTH CHINA SEA SINCE 16 MA[J]. Marine Geology & Quaternary Geology, 2013, 33(1): 91-95. doi: 10.3724/SP.J.1140.2013.01091 |
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| Authors: | ZHANG Hongyan JIANG Suhua LI Sanzhong |
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| Affiliation: | 1. College of Marine Geoscience, Ocean University of China, Qingdao 266003, China;;; 2. Key Lab of Submarine Geosciences and Exploration Techniques, Ministry of Education, Qingdao 266003, China |
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| Abstract: | The research of surface water temperature of paleo-oceans is usually focused on Quaternary, rarely earlier than 2.5Ma. Based on the data obtained from sites 1147 and 1148 of ODP 184 Cruise, using long-chain alkenones and oxygen isotopes of benthic foraminifera as proxies, we calculated the marine oxygen isotope composition and the seawater temperature changes since 16Ma in this paper. The planktonic foraminifera oxygen isotope method was adopted to explore the mechanism of ancient seawater temperature change. The results show that the trends of water temperature change in the northern South China Sea kept step with the global climate changes. During the formation of the northern hemispheric ice sheets, the sea surface temperatures are changed synchronously with the benthic foraminiferal δ18O, which indicate the size of the high-latitude ice sheet. It shows the special nature of ancient climate changes in such a tropical sea as the South China Sea and provides new evidence for the further study of the ancient global climate change in the low-latitude tropical sea. |
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| Keywords: | ancient water temperature oxygen isotopes long-chain alkenones benthic foraminifera South China Sea |
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