Disentangling Effects of Sea Surface Temperature and Water Depth on Hydroxylated Isoprenoid GDGTs: Insights From the Hadal Zone and Global Sediments

Xiao，Wenjie1,2; Xu，Yunping3; Zhang，Chuanlun1,4,5; Lin，Jian1,4,6; Wu，Weichao3; Xiaoxia，L.7; Tan，Jingqian1; Zhang，Xi3; Zheng，Fengfeng1; Song，Xiuqing5; Zhu，Yuanqing1,5; Yang，Yi7; Zhang，Hongrui8; Wenzhöfer，Frank2,9,10; Rowden，Ashley A.11,12; Glud，Ronnie N.2,13

2023-08-16

10.1029/2023GL103109

Geophysical Research Letters   Impact Factor & Quartile

0094-8276

1944-8007

Hydroxylated isoprenoid glycerol dialkyl glycerol tetraethers (OH-GDGTs) preserved in marine sediments are thought to be controlled by sea surface temperature (SST). However, water depth may also exert a significant influence on OH-GDGTs. Here, we investigated sedimentary OH-GDGTs in the Kermadec and Atacama trench regions (2,560–9,560 m water depth). Sedimentary OH-GDGTs in hadal trenches were dominated by OH-GDGT-0 (72 ± 8%), potentially reflecting an adaption of source organisms to ambient cold deep water. This result, combined with global data set, revealed that the predominance of OH-GDGT-0 is a ubiquitous phenomenon in deep-sea sediments, leading to a considerable underestimation of RI-OH′-derived SSTs. By considering both SST and water depth effects, we developed more accurate OH-GDGT-based paleothermometers for both shallow regions and the global ocean, encompassing the full-ocean-depth range. Our findings highlight the importance of accounting for the effect of water depth on OH-GDGTs and provide improved tools for reconstructing paleo-SSTs.

global oceans hadal trench OH-GDGTs sea surface temperature water depth

English

NI Journal Papers

First ; Corresponding

National Natural Science Foundation of China[41976030];National Natural Science Foundation of China[42206040];National Natural Science Foundation of China[42276033];National Institute of Water and Atmospheric Research[TAN1711];

GEOSCIENCES

2-s2.0-85167409680

Scopus

1.Shenzhen Key Laboratory of Marine Archaea Geo-Omics,Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,China
2.Department of Biology,HADAL,Nordcee & DIAS,University of Southern Denmark,Odense M,Denmark
3.Shanghai Frontiers Research Center of the Hadal Biosphere & HAST,College of Marine Sciences,Shanghai Ocean University,Shanghai,China
4.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,China
5.Shanghai Sheshan National Geophysical Observatory,Shanghai,China
6.Key Laboratory of Ocean and Marginal Sea Geology,Chinese Academy of Sciences,Guangzhou,China
7.Hubei Key Laboratory of Marine Geological Resource,China University of Geosciences,Wuhan,China
8.Department of Earth Sciences,ETH Zurich,Zurich,Switzerland
9.HGF-MPG Group for Deep Sea Ecology & Technology,Alfred Wegener Institute Helmholtz Centre for Polar- and Marine Research,Bremerhaven,Germany
10.Max Planck Institute for Marine Microbiology,Bremen,Germany
11.Coast and Oceans National Centre,National Institute of Water & Atmosphere Research (NIWA) Ltd,Wellington,New Zealand
12.School of Biological Sciences,Victoria University of Wellington,Wellington,New Zealand
13.Department of Ocean and Environmental Sciences,Tokyo University of Marine Science and Technology,Tokyo,Japan

Xiao，Wenjie,Xu，Yunping,Zhang，Chuanlun,et al. Disentangling Effects of Sea Surface Temperature and Water Depth on Hydroxylated Isoprenoid GDGTs: Insights From the Hadal Zone and Global Sediments[J]. Geophysical Research Letters,2023,50(15).

Xiao，Wenjie.,Xu，Yunping.,Zhang，Chuanlun.,Lin，Jian.,Wu，Weichao.,...&Glud，Ronnie N..(2023).Disentangling Effects of Sea Surface Temperature and Water Depth on Hydroxylated Isoprenoid GDGTs: Insights From the Hadal Zone and Global Sediments.Geophysical Research Letters,50(15).

Xiao，Wenjie,et al."Disentangling Effects of Sea Surface Temperature and Water Depth on Hydroxylated Isoprenoid GDGTs: Insights From the Hadal Zone and Global Sediments".Geophysical Research Letters 50.15(2023).