Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Paleoclimate Records of the Middle Okinawa Trough Since the Middle Holocene: Modulation of the Low-Latitude Climate | |
Liu, Lei1,2,3,4,5; Guan, Hongxiang1,2,3,4 ; Xu, Lanfang6,7; Sun, Zhilei4,5; Wu, Nengyou1,4,5
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| 2022-03-28 | |
| Source Publication | FRONTIERS IN EARTH SCIENCE
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| Volume | 10Pages:13 |
| Corresponding Author | Guan, Hongxiang(guanhongxiang@ouc.edu.cn) ; Wu, Nengyou(wuny@ms.giec.ac.cn) |
| Abstract | 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). |
| Keyword | isoprenoid glycerol dibiphytanyl glycerol tetraethers hydroxylated glycerol dibiphytanyl glycerol tetraethers TEXH (86) sea surface temperature okinawa trough |
| DOI | 10.3389/feart.2022.799280 |
| WOS Keyword | SEA-SURFACE TEMPERATURE ; HYDROXYLATED ISOPRENOID GDGTS ; DIALKYL GLYCEROL TETRAETHERS ; ASIAN SUMMER MONSOON ; HIGH-RESOLUTION ; LAST DEGLACIATION ; CHINA SEA ; NITROSOPUMILUS-MARITIMUS ; LIPID DISTRIBUTIONS ; KUROSHIO CURRENT |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Geology |
| Funding Organization | National Natural Science Foundation of China ; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao) |
| WOS Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000783550100001 |
| Publisher | FRONTIERS MEDIA SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/36174 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Guan, Hongxiang; Wu, Nengyou |
| Affiliation | 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 |
| Recommended Citation 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. |
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