南海沉积记录中Uk37指数与颗石藻生长季节对应性的探讨

doi:10.3969/j.issn.1001-909X.2015.01.004

海洋学研究 ›› 2015, Vol. 33 ›› Issue (1): 25-32.DOI: 10.3969/j.issn.1001-909X.2015.01.004

南海沉积记录中U^k₃₇指数与颗石藻生长季节对应性的探讨

张静静^1,2, 陈建芳^1,2, 李宏亮^*1,2, 金海燕^1,2, 王斌^1,2, 刘飞^1,2,3

1.国家海洋局第二海洋研究所,浙江杭州 310012;
2.国家海洋局海洋生态系统与生物地球化学重点实验室,浙江杭州 310012;
3. 南京大学地球科学与工程学院表生地球化学教育部重点实验室,江苏南京 210046

收稿日期:2014-10-20 修回日期:2014-12-08 出版日期:2015-03-15 发布日期:2022-11-25
通讯作者: *李宏亮(1981-),男,副研究员,主要从事海洋生物地球化学方面的研究。E-mail:lihongliang@sio.org.cn
作者简介:张静静(1989-),女,浙江温州市人,主要从事海洋生物地球化学方面的研究。E-mail:zjj@sio.org.cn
基金资助:
国家自然科学基金项目重大研究计划重点支撑项目资助(91128212);国家海洋局第二海洋研究所基本科研业务费专项资金项目资助(JT1010,JT1401,JG1220)

Correspondence between Sedimentary U^k₃₇index and seasonal Coccolith production

ZHANG Jing-jing^1,2, CHEN Jian-fang^1,2, LI Hong-liang^*1,2, JIN Hai-yan^1,2, WANG Bin^1,2 , LIU Fei^1,2,3

1. The Second Institute of Oceanography, SOA, Hangzhou 310012, China;
2. Laboratory of Marine Ecosystem and Biogeochemistry, SOA, Hangzhou 310012, China;
3. MOE Key Laboratory of Surficial Ge ochemistry, Department of Earth Sciences, Nanjing University, Nanjing 210046, China

Received:2014-10-20 Revised:2014-12-08 Online:2015-03-15 Published:2022-11-25

摘要/Abstract

摘要： 根据表层沉积物长链不饱和烯酮的不饱和度(U^k₃₇指数)以及现代海洋0~30 m层平均温度(Sea Surface Temperature, SST),探讨在低温和高温海区利用U^k₃₇指数重建上层古温度的合理性。同时,结合文献报道的南海上层水体中颗石藻(E. huxleyi,G. oceanica和G.ericsonii)细胞丰度的季节特征,探讨了沉积记录中U^k₃₇指数与季节的对应性。结果表明:(1)在极端低温和高温海区(-0.6 ℃和28 ℃)U^k₃₇指数仍是重建上层水体古温度的良好替代指标;(2)由于南海长链烯酮源生物——颗石藻的主要生长季节为冬季,因此,尽管南海表层沉积物中的U^k₃₇指数与4个季节的SST均显著相关,但沉积记录中的U^k₃₇指数反演的SST可能仅代表冬季上层水体的温度。

关键词: 古环境替代指标, U^k₃₇指数, 表层沉积物, 南海

Abstract: In this study, the U^k₃₇indices for surface sediment samples derived from the South China Sea (SCS), Pacific Ocean, East China Sea (ECS) and Arctic Ocean are analysed, as well as the overlying averaged sea surface temperature (SST) at 0~30 m depth. The alkenone-derived U^k₃₇index is justified as a useful palaeoenvironment proxy at extreme cold and warm end (-0.6 ℃~28 ℃) because the resulting U^k₃₇indices show a significant correlated linear relationship with annual averaged SST. Simultaneously, U^k₃₇indices have been correlated with averaged SST of four seasons in the SCS as well. However, the seasonal pattern of Coccolith (E. huxleyi and G. oceanic), being source of alkenone, is showed prosperous in winter time. As a result, the sedimentary U^k₃₇index may only reflect the winter SST of the overlying waters.

Key words: palaeoenvironment proxy, U^k₃₇index, surface sediment, South China Sea

中图分类号:

P734.5

张静静, 陈建芳, 李宏亮, 金海燕, 王斌, 刘飞. 南海沉积记录中U^k₃₇指数与颗石藻生长季节对应性的探讨[J]. 海洋学研究, 2015, 33(1): 25-32.

ZHANG Jing-jing, CHEN Jian-fang, LI Hong-liang, JIN Hai-yan, WANG Bin , LIU Fei. Correspondence between Sedimentary U^k₃₇index and seasonal Coccolith production[J]. Journal of Marine Sciences, 2015, 33(1): 25-32.

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南海沉积记录中U^k₃₇指数与颗石藻生长季节对应性的探讨

Correspondence between Sedimentary U^k₃₇index and seasonal Coccolith production

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