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OH-isoGDGTs as a paleothermometer for bottom seawater temperature in the eastern China marginal seas

文献类型：期刊论文

作者Wang, Yuning3,4,5,6; Yuan, Huamao3,4,5,6; Song, Jinming3,4,5,6; Chen, Junhui2,5; Pan, Fengmin3,4,5,6; Wang, Qidong3,4,5,6; Li, Xuegang3,4,5,6; Duan, Liqin3,4,5,6; Li, Ning3,4,5,6; Wang, Yueqi1,6
刊名CHEMICAL GEOLOGY
出版日期2025-06-20
卷号683页码:13
关键词Hydroxylated GDGTs Eastern China marginal seas Seasonality Bottom seawater temperature Temperature reconstruction
ISSN号0009-2541
DOI10.1016/j.chemgeo.2025.122768
通讯作者Yuan, Huamao(yuanhuamao@qdio.ac.cn) ; Song, Jinming()
英文摘要Hydroxylated isoprenoid glycerol dialkyl glycerol tetraethers (OH-isoGDGTs), which exhibit similar behavior to regular isoprenoid GDGTs (isoGDGTs), have shown potential for reconstructing past seawater temperature than isoGDGTs in marginal seas due to their reduced impact from terrestrial inputs. However, there are marginal seas exhibit regional variability, such as water depth and seasonality bias, in terms of how isoGDGTs and OH-isoGDGTs reflect the marine environment. In this study, we investigated OH-isoGDGTs in both suspended particulate matters and surface sediments of the eastern China marginal seas (ECMS), to constrain which water layer temperature the sedimentary OH-isoGDGTs-based indices better represents. Our results showed that OH-isoGDGTs concentrations were generally higher in bottom waters than in surface waters. Additionally, the composition of OH-isoGDGTs (and also isoGDGTs) in surface sediments showed no significant differences (p > 0.05) with that of bottom waters and significant differences (p < 0.05) with that of surface waters, indicating that OH-isoGDGTs in surface sediments were mainly derived from the deposition of bottom waters. Furthermore, OH-isoGDGTs-based indices in surface sediments correlated better with bottom seawater temperature (BST) than with surface seawater temperature (SST), reinforcing the notion that sedimentary OH-isoGDGTs mainly derive from bottom waters. Moreover, OH-isoGDGTs-based indices showed stronger correlations with summer and autumn temperatures compared to other seasons, and exhibited improved accuracy in BST reconstruction than isoGDGTs-based TEX86 indices, suggesting that sedimentary OH-isoGDGTs-based indices are potential BST proxies for warm seasons in the ECMS. Our findings enhance the understanding of the potential of OH-isoGDGTs as paleothermometer proxies in marginal seas and offer insights into their application for more precise paleoceanographic reconstructions.
WOS关键词SUSPENDED-PARTICULATE MATTER ; ISOPRENOID TETRAETHER LIPIDS ; NITROSOPUMILUS-MARITIMUS ; TEX86 PALEOTHERMOMETER ; GLYCEROL TETRAETHERS ; SURFACE TEMPERATURE ; MEMBRANE-LIPIDS ; WATER COLUMN ; INTACT POLAR ; SEDIMENTS
资助项目National Natural Science Foundation of China[42306047] ; National Natural Science Foundation of China[42130703] ; Shandong Provincial Natural Science Foundation[ZR2024QD198] ; Qingdao Postdoctoral Applied Research Project[QDBSH20240102088]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:001471580800001
出版者ELSEVIER
源URL[http://ir.qdio.ac.cn/handle/337002/201605]  
专题海洋研究所_海洋生态与环境科学重点实验室
通讯作者Yuan, Huamao; Song, Jinming
作者单位1.Qingdao Geoengn Surveying Inst, Minist Nat Resources, Key Lab Geol Safety Coastal Urban Underground Spac, Qingdao 266101, Peoples R China
2.Minist Nat Resources, Inst Oceanog 1, Qingdao Key Lab Analyt Technol Dev & Offshore Ecoe, Qingdao 266061, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266000, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Qingdao Marine Sci & Technol Ctr, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
6.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266000, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Yuning,Yuan, Huamao,Song, Jinming,et al. OH-isoGDGTs as a paleothermometer for bottom seawater temperature in the eastern China marginal seas[J]. CHEMICAL GEOLOGY,2025,683:13.
APA Wang, Yuning.,Yuan, Huamao.,Song, Jinming.,Chen, Junhui.,Pan, Fengmin.,...&Wang, Yueqi.(2025).OH-isoGDGTs as a paleothermometer for bottom seawater temperature in the eastern China marginal seas.CHEMICAL GEOLOGY,683,13.
MLA Wang, Yuning,et al."OH-isoGDGTs as a paleothermometer for bottom seawater temperature in the eastern China marginal seas".CHEMICAL GEOLOGY 683(2025):13.

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来源：海洋研究所

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