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| 西菲律宾海2万年以来浮游有孔虫壳体重量变化 |
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安佰正,李铁刚,孙晗杰,于心科,仇晓华
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中国科学院 海洋研究所;中国科学院 海洋地质与环境重点实验室;中国科学院研究生院;山东省第一地质矿产勘查院,中国科学院 海洋研究所;中国科学院 海洋地质与环境重点实验室,中国科学院 海洋研究所,中国科学院 海洋研究所,山东省第一地质矿产勘查院
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| 摘要: |
| 对取自西菲律宾海MD06-3052岩心的浮游有孔虫表层种G. ruber进行壳体重量分析工作,基于氧同位素年龄模式,获得了2万年以来有孔虫传统壳体壳体重量(MSW)和标准化壳体重量(SNW)变化特征。对比两种壳体重量指标,发现在本海区标准化壳体重量指标更为准确。结果表明,2万年以来,浮游有孔虫SNW具有不断变轻的趋势,整体表现为冰期时壳体重量较重,而全新世时壳体重量相对较轻。LGM以来浮游有孔虫SNW变化曲线同大气CO2具有较好的相似性,说明在该海区控制壳体重量的主要因素为表层海水[CO32-]。 |
| 关键词: 西太平洋 浮游有孔虫 壳体重量 |
| DOI： |
| 分类号:P736 |
| 基金项目:中国科学院战略性先导科技专项项目(XDA11030104); 国家海洋局专项(No.GASI-04-01-02); 国家自然科学基金项目(41230959, 41206044). |
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| Planktonic foraminifera shell weight record in the western Philippine Sea since 20ka ago |
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AN Baizheng,LI Tie-gang,SUN Han-jie,YU Xin-ke and QIU Xiao-hua
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Institute of Oceanology, Chinese Academy of Sciences,Institute of Oceanology, Chinese Academy of Sciences,Institute of Oceanology, Chinese Academy of Sciences,Institute of Oceanology, Chinese Academy of Sciences,No.1 Institute of Geology and Mineral Resources of Shandong Province
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| Abstract: |
| The mean shell weight (MSW) and shell size-normalized weight (SNW) of Globigerinoides ruber were investigated at Site MD06-3052 taken from the western Philippine Sea during the last 20ka. Both shell weight proxies show the same trend of lightening. The SNW proxy was more accurate than the MSW proxy in our studies, with the relatively less specimens of G. ruber preserved in the sediments. The SNW results demonstrate high values during last maximum glacial period, and low values during the Holocene. Compared with the local SST, ice-core CO2 content, The SNW curve was suggested to reflect the carbonate ion in the surface seawater, a signal of the Global CO2 content. |
| Key words: the western Philippine Sea planktonic foraminifera shell weight |