TEX86 paleothermometer as an indication of bottom water temperature in the Yellow Sea

doi:10.1016/j.orggeochem.2015.05.007

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋地质与地球物理研究室

	TEX86 paleothermometer as an indication of bottom water temperature in the Yellow Sea
	Xing, Lei 1,2; Sachs, Julian P.3; Gao, Wenxian 1,2; Tao, Shuqing 1,2; Zhao, Xiaochen 1,2; Li, Li 1,2; Liu, Yanguang 4; Zhao, Meixun 1,2
刊名	ORGANIC GEOCHEMISTRY
	2015-09
卷号	86 页码:19-31
关键词	GDGTs TEX86 U-37(K') The Yellow Sea
ISSN号	0146-6380
DOI	10.1016/j.orggeochem.2015.05.007
英文摘要	The TEX86 paleothermometer was applied for reconstructing sea surface temperature (SST) from glycerol dialkyl glycerol tetraethers (GDGTs) in marine sediments. It has become clear that GDGT-producing archaea live throughout the water column, with maximum concentration usually well below the surface mixed layer of the ocean. Why the TEX86 parameter correlates well with SST remains poorly understood. Here we evaluate the fidelity of the TEX86 thermometer using surface sediments and suspended particles from the Yellow Sea (YS), a shallow marginal sea between China and the Korean peninsula. The highest concentration of GDGTs in the water column at a site (A02) from the middle of the YS occurred in the bottom layer, at 70 m. This contrasts with phytoplankton lipids, which were most abundant near the surface. Consistent with the maximum abundance of GDGTs in bottom water, TEX86 values in surface sediments correlated better with mean annual bottom water temperature (BWT, R-2 0.81) than with mean annual SST (R-2 0.74). Moreover, TEX86H temperature derived from a global core top calibration gave values 0.1-9.4 degrees C colder than mean annual SST but much closer to mean annual BWT (2.7-4 degrees C). Lastly, TEX86 and U-37(K') paleotemperature values displayed distinctly different trends over the last 12 kyr for sediments from the shelf between the YS and the East China Sea (ECS), consistent with the notion that TEX86 and U-37(K') reflect different temperature signals. This preponderance of evidence supports the use of TEX86 as a proxy for BWT in the YS. Therefore, we propose a local calibration of TEX86L for reconstructing mean annual BWT (TEX86L = 0.03 BWT-0.94; R-2 0.86, n = 22, P < 0.0001). The combination of alkenone (U-37(K')) derived SST with TEX86L BWT yielded a quantitative reconstruction of the vertical thermal gradient in the YS, and an insight into understanding the impact of the Kuroshio Current and East Asian monsoon on the YS. (C) 2015 Elsevier Ltd. All rights reserved.
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000358552400003
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3623]
专题	业务部门_海洋地质与地球物理研究室
作者单位	1.Ocean Univ China, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China; 2.Ocean Univ China, Inst Marine Organ Geochem, Qingdao 266100, Peoples R China; 3.Univ Washington, Sch Oceanog, Seattle, WA 98195 USA; 4.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Xing, Lei,Sachs, Julian P.,Gao, Wenxian,et al. TEX86 paleothermometer as an indication of bottom water temperature in the Yellow Sea[J]. ORGANIC GEOCHEMISTRY,2015,86:19-31.
APA	Xing, Lei.,Sachs, Julian P..,Gao, Wenxian.,Tao, Shuqing.,Zhao, Xiaochen.,...&Zhao, Meixun.(2015).TEX86 paleothermometer as an indication of bottom water temperature in the Yellow Sea.ORGANIC GEOCHEMISTRY,86,19-31.
MLA	Xing, Lei,et al."TEX86 paleothermometer as an indication of bottom water temperature in the Yellow Sea".ORGANIC GEOCHEMISTRY 86(2015):19-31.