Paleoclimate Records of the Middle Okinawa Trough Since the Middle Holocene: Modulation of the Low-Latitude Climate

doi:10.3389/feart.2022.799280

GIEC OpenIR

	Paleoclimate Records of the Middle Okinawa Trough Since the Middle Holocene: Modulation of the Low-Latitude Climate
	Liu, Lei 1,2,3,4,5; Guan, Hongxiang1,2,3,4 ; Xu, Lanfang 6,7; Sun, Zhilei 4,5; Wu, Nengyou1,4,5
	2022-03-28
发表期刊	FRONTIERS IN EARTH SCIENCE
卷号	10 页码:13
通讯作者	Guan, Hongxiang(guanhongxiang@ouc.edu.cn) ; Wu, Nengyou(wuny@ms.giec.ac.cn)
摘要	The ubiquity of glycerol dibiphytanyl glycerol tetraethers (GDGTs) and their temperature sensitivity make them one of the most effective tools for paleoclimate reconstruction. High- and low-latitude climates influence the Okinawa Trough (OT). It receives diverse inputs from the East China Sea, the western Pacific, and the Kuroshio Current, providing good conditions for paleoclimate studies. Here, isoprenoid GDGTs (isoGDGTs), branched GDGTs, and hydroxylated GDGTs (OH-GDGTs) were studied to reconstruct the sea surface temperature (SST) of the central OT for the past 8.2 kyr using the tetraether index of 86 carbon atoms at low latitudes (TEX86H) and the ring index of OH-GDGTs (RI-OH). The GDGT-0/crenarchaeol ratios ranged from 0.39 to 0.98. The branched and isoprenoid tetraether index and the methane index values were lower than 0.1 and 0.5, respectively, indicating that the isoGDGTs were mainly derived from marine Thaumarchaeota and that TEX86H could be used to reconstruct the paleotemperatures. The TEX86H SSTs ranged from 21.6 to 27.2 degrees C during 8.2 kyr. The overall range of TEX86H SSTs is close to the U-37(K') SST of the middle OT and reflects the mean annual SST. In contrast, RI-OH temperatures varied from 17.4 to 26.0 degrees C, showing a lower trend than TEX86H SSTs. The core top RI-OH temperature is 24.1 degrees C, in line with the mean annual seawater temperature at 40 m (24.2 degrees C) in the study area, which likely reflects the subsurface temperature in this case. The small overall warming trend of TEX86H SSTs agrees with the increasing intensity of the Kuroshio Current during the last 8.2 kyr, indicating that the SST evolution is governed by the Kuroshio Current that transports heat from the western tropical Pacific. The decreasing temperature differences between TEX86H and RI-OH and between U-37(K') and RI-OH showed increased mixing of the upper water column, which was in good accordance with the increasing low-latitude winter insolation decoupling from the East Asian summer monsoon. The cold event that occurred at 7.4-6.6 kyr was magnified (similar to 5 degrees C) at the TEX86H and RI-OH temperatures and possibly caused by tephra's significant input (similar to 7.3 kyr).
关键词	isoprenoid glycerol dibiphytanyl glycerol tetraethers hydroxylated glycerol dibiphytanyl glycerol tetraethers TEXH (86) sea surface temperature okinawa trough
DOI	10.3389/feart.2022.799280
关键词[WOS]	SEA-SURFACE TEMPERATURE ; HYDROXYLATED ISOPRENOID GDGTS ; DIALKYL GLYCEROL TETRAETHERS ; ASIAN SUMMER MONSOON ; HIGH-RESOLUTION ; LAST DEGLACIATION ; CHINA SEA ; NITROSOPUMILUS-MARITIMUS ; LIPID DISTRIBUTIONS ; KUROSHIO CURRENT
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[91958105] ; National Natural Science Foundation of China[91858208] ; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[2021QNLM020002]
WOS研究方向	Geology
项目资助者	National Natural Science Foundation of China ; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000783550100001
出版者	FRONTIERS MEDIA SA
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/36174
专题	中国科学院广州能源研究所
通讯作者	Guan, Hongxiang; Wu, Nengyou
作者单位	1.Ocean Univ China, Dept Environm Sci & Engn, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Qingdao, Peoples R China 2.Ocean Univ China, MOE, Key Lab Submarine Geosci & Prospecting Tech, Qingdao, Peoples R China 3.Ocean Univ China, Coll Marine Geosci, Qingdao, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China 5.Qingdao Inst Marine Geol, Key Lab Gas Hydrate, Minist Nat Resources, Qingdao, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China 7.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Lei,Guan, Hongxiang,Xu, Lanfang,et al. Paleoclimate Records of the Middle Okinawa Trough Since the Middle Holocene: Modulation of the Low-Latitude Climate[J]. FRONTIERS IN EARTH SCIENCE,2022,10:13.
APA	Liu, Lei,Guan, Hongxiang,Xu, Lanfang,Sun, Zhilei,&Wu, Nengyou.(2022).Paleoclimate Records of the Middle Okinawa Trough Since the Middle Holocene: Modulation of the Low-Latitude Climate.FRONTIERS IN EARTH SCIENCE,10,13.
MLA	Liu, Lei,et al."Paleoclimate Records of the Middle Okinawa Trough Since the Middle Holocene: Modulation of the Low-Latitude Climate".FRONTIERS IN EARTH SCIENCE 10(2022):13.