马来西亚东北部Setiu潟湖1970年以来沉积环境演化及其对ENSO的响应

赵周平; 李超; 骆正骅; Nicholas Ng Chia Wei; 戴璐

doi:10.12284/hyxb2024045

马来西亚东北部Setiu潟湖1970年以来沉积环境演化及其对ENSO的响应

doi: 10.12284/hyxb2024045

同济大学海洋地质国家重点实验室，上海 200092

基金项目: 国家重点研发计划项目（2022YFF0800504）；国家自然科学基金项目（42273057，42076063）；上海市自然科学基金项目（21590712700）。

详细信息

作者简介:
赵周平（2002—），女，河南省安阳市人，主要从事海洋沉积地球化学研究。E-mail：zpzhao@tongji.edu.cn

通讯作者:
李超（1983—），男，山东省莱芜市人，博士，副教授，主要从事海洋沉积地球化学研究。E-mail：cli@tongji.edu.cn

中图分类号: P736.21⁺3
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出版历程
- 收稿日期: 2024-02-01
- 录用日期: 2024-04-30
- 修回日期: 2024-03-06
- 网络出版日期: 2024-05-07
- 刊出日期: 2024-06-30

Evolution of sedimentary environment in Setiu Lagoon, northeastern Malaysia, and its response to ENSO

State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China

摘要

摘要: 马来半岛位于低纬热带地区，厄尔尼诺−南方涛动（El Niño-Southern Oscillation，ENSO）如何影响该区域的气候，尤其是降水仍然存在争议。本文以马来半岛东北部登嘉楼州Setiu潟湖钻孔NTT-3为研究对象，通过分析粒度、总有机碳及总氮含量、C/N比值和XRF岩心扫描等，探讨该钻孔的沉积环境变化及其对ENSO的响应。研究结果显示，钻孔记录中自1970年前后（84 cm处）出现两种不同的变化趋势。1970年之前钻孔下部沉积物粒度、有机和无机地球化学特征趋势波动明显，沉积速率较低。而1970年以来，潟湖沉积环境总体稳定，沉积物中的有机组分主要来自红树林，同时伴有河流输入的淡水浮游植物的贡献。频谱分析结果显示1970年以来钻孔上部存在明显的ENSO周期变化。强厄尔尼诺现象基本对应低Zr/Rb比值和低Zr/Ti比值，而强拉尼娜（La Niña）现象基本对应高Zr/Rb比值和高Zr/Ti比值。该结论不仅支持了现代观测对马来半岛东部沿海地区气候变化的认识，同时也在地质记录中发现了ENSO变化的直接证据，对全面认识和理解ENSO对亚洲气候变化的影响、区域陆海相互作用过程和环境响应等方面具有重要现实意义。
- Setiu潟湖 /
- 沉积记录 /
- 频谱分析 /
- ENSO
Abstract: The impact of the El Niño-Southern Oscillation (ENSO) on the climate of the low-latitude tropical region of the Malay Peninsula, particularly with regard to precipitation, remains a topic of debate. This study focuses on the NTT-3 drill core from Setiu Lagoon in Terengganu, northeastern Malay Peninsula. By employing analyses such as grain size, total organic carbon/nitrogen content, C/N ratio, and XRF core scanning, this research investigates the sedimentary environmental changes in the drill core and their response to ENSO. The results reveal two distinct trends in the drill core record, appearing around 1970 (at 84 cm depth). Sediment characteristics such as grain size and geochemical features of both organic and inorganic components suggest the possible occurrence of episodic sedimentation or sedimentary interruptions, with exceptionally slow sedimentation rates observed in the lower part of the core before 1970. Since 1970, the organic components in the lagoon sediment primarily originate from mangroves, accompanied by contributions from freshwater phytoplankton associated with river inputs. Spectral analysis indicates a pronounced ENSO periodic variation in the upper part of the drill core since 1970. The variations in Zr/Rb and Zr/Ti ratios correlate well with the occurrences of strong El Niño and La Niña events. This conclusion not only supports contemporary observations of climate change in the eastern coastal region of the Malay Peninsula but also provides direct geological evidence of ENSO variations in the sedimentary record. This discovery holds significant practical implications for a comprehensive understanding of the impact of ENSO on climate change in Asia, regional land-sea interaction processes, and environmental responses.
- Setiu Lagoon /
- sedimentary environment /
- spectral analysis /
- El Niño-Southern Oscillation (ENSO)

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图 1 研究区域、钻孔点位及岩心剖面

a. 马来半岛研究区域及夏、冬季风方向；b. 研究区卫星图片（来自谷歌地球）；c. 钻孔NTT-3岩性和粒度组成

Fig. 1 Study area, drilling locations, and core profile diagram

a. Study area of the Malay Peninsula and the direction of summer and winter winds; b. satellite image of the study area (from Google Eeath); c. Lithology and partice sire composition of Borehole NTT-3

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图 2 NTT-3钻孔定年结果

a. ²¹⁰Pb_ex和²¹⁰Pb_su剖面；b. ²¹⁰Pb和¹⁴C定年结果

Fig. 2 Dating results of Core NTT-3

a. ²¹⁰Pb_ex and ²¹⁰Pb_su profile; b. ²¹⁰Pb and ¹⁴C dating result

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图 3 NTT-3钻孔有机地球化学指标垂向变化曲线

Fig. 3 Vertical variation of organic geochemical parameters in Core NTT-3

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图 4 NTT-3钻孔元素含量及比值的垂向变化曲线Fig. 4 Vertical variation of elemental contents and ratios in Core NTT-3

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图 5 NTT-3钻孔沉积物C/N比值和δ¹³C值（据[20]修改）

Fig. 5 C/N ratio and δ¹³C value in Core NTT-3 (modified according of raference [20])

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图 6 地球化学指标频谱分析（95%置信区间）

Fig. 6 Geochemical indices spectrum analysis (95% confidence interval)

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图 7 NTT-3钻孔Zr/Rb、Zr/Ti比值记录与Niño 3.4 指数对比（Niño 3.4 指数来自http://www.cpc.ncep.noaa.gov/data/indices）

Fig. 7 The ratios of Zr/Rb and Zr/Ti in Core NTT-3 and comparisons with Niño 3.4 index

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表 1 马来西亚东北部近岸NTT-3孔沉积物AMS ¹⁴C测年结果

Tab. 1 The AMS ¹⁴C dating results of sediments from NTT-3 core in the northeastern coastal area of Malaysia

深度/cm	测年材料	¹⁴C年龄/ (a BP）	校正年龄/ （cal a BP）（2σ）	平均日历年龄/ （A.D.）
93～94	植物	−30 ± 30	−5～−7 (0.85)	1956
104～105	植物	−15 ± 30	−5～−7 (0.95)	1955
120～121	植物	−660 ± 30	−50～−54 (0.89)	2001
124～125	植物	360 ± 30	410～315 (0.47)	1588
145～146	植物	890 ± 30	834～732 (0.60)	1167

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