Distribution of tetraether lipids in surface sediments of the northern South China Sea: Implications for TEX86 proxies
Distribution of tetraether lipids in surface sediments of the northern South China Sea: Implications for TEX86 proxies
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南海北部表层沉积物中四醚脂质的分布：对 TEX86 代理的影响
DOI：
10.1016/j.gsf.2012.10.002
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发表时间：
2013-03
期刊：
影响因子：
--
通讯作者：
Guodong Jia
中科院分区：
文献类型：
--
作者：
Huangmin Ge;Chuanlun L. Zhang;Chuanlun L. Zhang;Hongyue Dang;Hongyue Dang;Chun Zhu;Chun Zhu;Guodong Jia;Guodong Jia
古海洋生物具有独特的甘油二烷基甘油四醚（GDGT）脂质，可用于开发古温度代用指标，如TEX 86。本研究旨在验证GDGT替代指标在南海古温度测定中的应用。样品采自南海北方的岩芯顶部沉积物（0-5 cm）。提取总脂质以获得核心GDGT，使用液相色谱-质谱法（LC-MS）对其进行鉴定和定量。类异戊二烯GDGT（iGDGT）的丰度范围从271.5纳克/克干沉积物到1266.3纳克/克干沉积物，而分支GDGT（bGDGT），假定来自陆地来源，范围从22.2纳克/克干沉积物到56.7纳克/克干沉积物。TEX 86得出的海面温度范围从沿海（水深< 160米）的20.9 °C到近海（水深> 1000米）的27.9 °C不等。海岸附近TEX 86衍生温度（<160 m水深）平均为23.1 ± 2.5 °C（n = 4），与卫星反演的冬季平均海表温度接近（平均22.6 ± 1.0 ℃，n = 4）;而TEX 86得出的近海平均温度为27.4 ± 0.3 °C（n = 7），与卫星年平均海面温度一致（平均26.8 ± 0.4 °C，n = 7）。这些结果表明，TEX 86可能记录了公海的海表年平均温度，而它可能记录了浅水区的冬季海表温度。
Archaea have unique glycerol dialkyl glycerol tetraether (GDGT) lipids that can be used to develop paleotemperature proxies such as TEX86. This research is to validate proposed GDGT-proxies for paleotemperature determination in the South China Sea (SCS). Samples were collected from core-top sediments (0–5 cm) in the northern SCS. Total lipids were extracted to obtain core GDGTs, which were identified and quantified using liquid chromatography-mass spectrometry (LC-MS). The abundance of isoprenoidal GDGTs (iGDGTs) ranged from 271.5 ng/g dry sediment to 1266.3 ng/g dry sediment, whereas the branched GDGTs (bGDGTs), supposedly derived from terrestrial sources, ranged from 22.2 ng/g dry sediment to 56.7 ng/g dry sediment. The TEX86-derived sea surface temperatures ranged from 20.9 °C in the coast (water depth < 160 m) to 27.9 °C offshore (water depth > 1000 m). TEX86-derived temperatures near shore (<160 m water depth) averaged 23.1 ± 2.5 °C (n = 4), which were close to the satellite-derived winter mean sea surface temperature (average 22.6 ± 1.0 °C, n = 4); whereas the TEX86-derived temperatures offshore averaged 27.4 ± 0.3 °C (n = 7) and were consistent with the satellite mean annual sea surface temperature (average 26.8 ± 0.4 °C, n = 7). These results suggest that TEX86may record the sea surface mean annual temperature in the open ocean, while it likely records winter sea surface temperature in the shallower water.
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影响因子：
5
作者：
Kim, Jung-Hyun;van der Meer, Jaap;Damste, Jaap S. Sinninghe
通讯作者：
Damste, Jaap S. Sinninghe
影响因子：
3
作者：
S. Wakeham;R. Amann;K. Freeman;E. Hopmans;B. Jørgensen;Isabell F. Putnam;Stefan Schouten;J. Damsté-J.-Dam
通讯作者：
S. Wakeham;R. Amann;K. Freeman;E. Hopmans;B. Jørgensen;Isabell F. Putnam;Stefan Schouten;J. Damsté-J.-Dam
影响因子：
5.2
作者：
van Hoek AH;Mevius D;Guerra B;Mullany P;Roberts AP;Aarts HJ
通讯作者：
Aarts HJ
影响因子：
7.4
作者：
Stefan Schouten;C. Huguet;E. Hopmans;M. Kienhuis;J. Damsté
通讯作者：
Stefan Schouten;C. Huguet;E. Hopmans;M. Kienhuis;J. Damsté
影响因子：
--
作者：
C. Wuchter;Stefan Schouten;M. Coolen;J. Damsté
通讯作者：
C. Wuchter;Stefan Schouten;M. Coolen;J. Damsté