Holocene Paleoclimate Records in Equatorial West Africa: Insights Based on the Characterization of Glycerol Dialkyl Glycerol Tetraethers
文献类型：期刊论文
| 作者 | Yang, Peining1,2; Mao, Shengyi1; Cao, Yiyun1,3; Liu, Li1,3; Zhai, Mengyue4; Qiu, Zhongyan5; Liu, Lihua1 |
| 刊名 | WATER
 |
| 出版日期 | 2024-03-01 |
| 卷号 | 16期号:5页码:13 |
| 关键词 | Gulf of Guinea Thaumarchaeota glycerol dialkyl glycerol tetraethers sea surface temperatures OM source |
| DOI | 10.3390/w16050771 |
| 通讯作者 | Liu, Lihua(liulh@ms.giec.ac.cn) |
| 英文摘要 | One gravity core retrieved from the Niger Delta was used to explore the origin of deposited organic matter (OM) and the paleo-climatic and environmental conditions over the Holocene in equatorial West Africa. The geochemical properties of sediments including glycerol dialkyl glycerol tetraethers (GDGTs) and elemental (%OC, %N, C/N) and isotopic (delta 13Corg, delta 15N) signatures were determined. The determination constrained the age of the column and revealed that the sediment OM was mainly derived from a marine source. The isoprenoid (iso)GDGTs were the dominant GDGTs, with a small amount of branched (br)GDGTs, which led to a low-branched and isoprenoid tetraether index (BIT, 0.02-0.21) and represented a low terrestrial input. Most isoGDGTs and OH-GDGTs were produced in situ by Marine Group I (MG-I) Thaumarchaeota, while the brGDGTs were mainly transported from land. A two-endmember model quantified the contribution of terrestrial OM, as 0.9-19.9% by BIT and 1.1-32.6% by delta 13C. Accordingly, the millennium-scale sea surface temperatures (SSTs) were reconstructed based on the cyclopentane ring distribution (TEX86H) and the ring index of OH-GDGTs (RI-OH). The top core SSTs were lower than the modern mean annual SST due to the growth season and habitat depth of Thaumarchaeota. The reconstructed SSTs clearly revealed the four stages of paleoclimate change, in particular, the drought episode of 8.2 kyr and the following humid period. The above research has enhanced our understanding of the paleoclimate change in river outflow during the Holocene at the millennium scale. |
| WOS关键词 | ORGANIC-CARBON ; MEMBRANE-LIPIDS ; SEDIMENTS ; MARINE ; TEX86 ; TEMPERATURE ; OCEAN ; PROXY ; GULF ; ESTUARY |
| 资助项目 | NSF program |
| WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001182956500001 |
| 出版者 | MDPI |
| 资助机构 | NSF program |
| 源URL | [http://ir.giec.ac.cn/handle/344007/41130]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Liu, Lihua |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Sci & Technol China, Sch Engn Sci, Dept Thermal Sci & Energy Engn, Hefei 230026, Peoples R China 4.China Univ Geosci, Sch Ocean Sci, Dept Marine Sci, Beijing 100083, Peoples R China 5.Minist Natl Resources, Inst Oceanog 2, Key Lab Submarine Geosci, Hangzhou 310012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Peining,Mao, Shengyi,Cao, Yiyun,et al. Holocene Paleoclimate Records in Equatorial West Africa: Insights Based on the Characterization of Glycerol Dialkyl Glycerol Tetraethers[J]. WATER,2024,16(5):13. |
| APA | Yang, Peining.,Mao, Shengyi.,Cao, Yiyun.,Liu, Li.,Zhai, Mengyue.,...&Liu, Lihua.(2024).Holocene Paleoclimate Records in Equatorial West Africa: Insights Based on the Characterization of Glycerol Dialkyl Glycerol Tetraethers.WATER,16(5),13. |
| MLA | Yang, Peining,et al."Holocene Paleoclimate Records in Equatorial West Africa: Insights Based on the Characterization of Glycerol Dialkyl Glycerol Tetraethers".WATER 16.5(2024):13. |
入库方式： OAI收割
来源：广州能源研究所
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