海洋学研究 >

2019 , Vol. 37 >Issue 1: 30 - 39

DOI: https://doi.org/10.3969/j.issn.1001-909X.2019.01.005

研究论文

南极罗斯海表层沉积物GDGTs含量分布及其环境意义

  • 陈文深 ,
  • 于培松 ,
  • 韩喜彬 ,
  • 赵军 ,
  • 潘建明
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  • 1.自然资源部 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.国家海洋局 海底科学重点实验室,浙江 杭州 310012
陈文深(1990-),男,广东惠州市人,主要从事海洋生物地球化学研究。E-mail:chenwenvince@163.com

收稿日期: 2017-06-08

  修回日期: 2019-01-07

  网络出版日期: 2022-11-21

基金资助

南北极环境综合考察与评估专项项目资助(CHINARE2015-01-02,CHINARE2017-01-02,CHINARE2017-01-04,CHINARE2017-04-01);国家自然科学基金项目资助(41376193,41306202)

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Contents and distribution of GDGTs in surface sediments of Ross Sea, Antarctic and their environmental significances

  • CHEN Wen-shen ,
  • YU Pei-song ,
  • HAN Xi-bin ,
  • ZHAO Jun ,
  • PAN Jian-ming
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  • 1. Second Institute of Oceanography, MNR, Hangzhou 310012, China;
    2. Key Laboratory of Marine Ecosystem and Biogeochemistry, SOA, Hangzhou 310012, China;
    3. Key Laboratory of Submarine Geosciences, SOA, Hangzhou 310012, China

Received date: 2017-06-08

  Revised date: 2019-01-07

  Online published: 2022-11-21

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摘要

通过分析罗斯海15个表层沉积物中甘油双烷基甘油四醚(Glycerol Dialkyl Glycerol Tetraethers,GDGTs)的含量与分布,探讨了各种GDGTs来源及TEX86指标的环境意义。结果表明:表层沉积物中GDGTs总含量为93.67~2 663.37 ng/g,其中类异戊二烯GDGTs(IsoGDGTs)占90.33%~98.56%,远高于支链GDGTs(BrGDGTs)。类异戊二烯GDGTs与支链GDGTs具有显著的耦合关系(R2=0.88,p<0.01)。沉积物中的IsoGDGTs主要来源于海洋奇古菌,BrGDGTs主要由海洋水体和沉积物中原位细菌所产生。应用TEXL86公式估算研究区SST,与WOA夏季表层温度呈现较好的线性关系,表明TEXL86指标在罗斯海具有适用性,可作为重建古海洋温度的替代指标。

关键词： 罗斯海; 沉积物; GDGTs; TEX86

本文引用格式

陈文深 , 于培松 , 韩喜彬 , 赵军 , 潘建明 . 南极罗斯海表层沉积物GDGTs含量分布及其环境意义[J]. 海洋学研究, 2019 , 37(1) : 30 -39 . DOI: 10.3969/j.issn.1001-909X.2019.01.005

Abstract

The contents and distribution of Glycerol Dialkyl Glycerol Tetraethers (GDGTs) in 15 surface sediment samples from Ross Sea, Antarctica were analyzed. Besides, the source of GDGTs and environmental implications of TEX86 were disscussed. The results show that the content of GDGTs is from 93.67 to 2 663.37 ng/g with the isoprenoid GDGTs accounts for 90.33%98.56%, which are much more higher than those of branched GDGTs. Isoprenoid GDGTs have significant positive correlation with branched GDGTs (R2=0.88,p<0.01). The result indicates that isoprenoid GDGTs come from marine Archaea while branched GDGTs are mainly from bacteria in sea waters and sediments. Correlation analysis with the WOA database shows that the TEXL86 index reconstructed temperatures are of significant positive correlation with the sea surface temperatures in summer in the study area. Thus,the TEXL86 could be used as a potential index for paleo-SST reconstruction in the Ross Sea.

Key words： Ross Sea; sediment; GDGTs; TEX86

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