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Insights into Quaternary iron fertilization dynamics in the western equatorial Pacific: Proxy archives offshore of northern Papua New Guinea

文献类型：期刊论文

作者Xu, Zhaokai3,8; Fan, Qingchao3,5; Dang, Haowen6; Wan, Shiming3,8; Colin, Christophe7; Wu, Jiawang1; Lim, Dhongil2,3; Li, Tiegang3,4,8
刊名GLOBAL AND PLANETARY CHANGE
出版日期2025-10-01
卷号253页码:12
关键词Iron fertilization Biologic production Orbital insolation Papua New Guinea Western equatorial Pacific Quaternary
ISSN号0921-8181
DOI10.1016/j.gloplacha.2025.104952
通讯作者Xu, Zhaokai(zhaokaixu@qdio.ac.cn) ; Lim, Dhongil(oceanlim@kiost.ac.kr) ; Li, Tiegang(tgli@fio.org.cn)
英文摘要The equatorial Pacific is a key oceanographic region for unraveling Earth's climate system dynamics, where nutrient availability (e.g., iron, nitrogen, and phosphorus) plays a crucial role, at least partially, in governing the biologic pump and sea-air carbon exchange. Despite this, provenance, routing, and depositional processes, together with fertilization effects of nutrient supply to the western equatorial Pacific during the Quaternary, with Papua New Guinea potentially acting as a major iron contributor, remain elusive. Here, we present a comprehensive analysis of proxy archives for island erosion and weathering, terrestrial matter supply, surface ocean productivity, downward export of biogenic material, and bottom-water redox, all closely linked to orbital variations of iron fertilization, along the continental slope offshore of northern Papua New Guinea since 275 kyr. Our findings reveal a prominent precession cycle across these integrated records, aligning with changes in January-March insolation at 5 degrees S. The observed temporal coupling indicates that heightened precipitation and erosion in northern Papua New Guinea stimulated nutrient input, thereby enhancing surface ocean fertilization, biologic production, and particulate carbon burial in the western equatorial Pacific during periods of high January-March insolation at 5 degrees S. This caused the area to be a significant atmospheric CO2 sink during La Ninalike conditions. We propose that enhanced erosion in northern Papua New Guinea led to increased iron fertilization in the western equatorial Pacific. Ongoing iron fertilization may significantly mitigate anthropogenic global warming by enhancing atmospheric CO2 sequestration associated with increased occurrences of future consecutive La Nina events, as predicted by model simulations.
WOS关键词OKINAWA TROUGH ; CHINA SEA ; OCEAN ; SEDIMENTS ; EROSION ; CARBON ; CONSTRAINTS ; VARIABILITY ; PROVENANCE ; ISOTOPES
资助项目National Natural Science Foundation of China[42125602] ; National Natural Science Foundation of China[42222603] ; National Key Research and Development Program of China[2022YFF0800503] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40010100] ; Laoshan Laboratory[LSKJ202204200] ; Open Fund Project of the State Key Laboratory of Marine Geology[MGK202208] ; National Research Foundation of Korea[RS-2024-00346132] ; Korea Institute of Ocean Science & Technology - Ministry of Oceans and Fisheries[RS-2023-00256330]
WOS研究方向Physical Geography ; Geology
语种英语
WOS记录号WOS:001541977200001
出版者ELSEVIER
源URL[http://ir.qdio.ac.cn/handle/337002/202824]  
专题海洋研究所_海洋环流与波动重点实验室
通讯作者Xu, Zhaokai; Lim, Dhongil; Li, Tiegang
作者单位1.Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 519082, Guangdong, Peoples R China
2.Korea Inst Ocean Sci & Technol, South Sea Res Inst, Geoje 53201, South Korea
3.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
4.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Metallogeny, Qingdao 266061, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
7.Univ Paris Saclay, French Ctr Sci Res, Lab Geosci Paris Sud, F-91405 Orsay, France
8.Qingdao Marine Sci & Technol Ctr, Lab Marine Geol, Qingdao 266237, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Zhaokai,Fan, Qingchao,Dang, Haowen,et al. Insights into Quaternary iron fertilization dynamics in the western equatorial Pacific: Proxy archives offshore of northern Papua New Guinea[J]. GLOBAL AND PLANETARY CHANGE,2025,253:12.
APA Xu, Zhaokai.,Fan, Qingchao.,Dang, Haowen.,Wan, Shiming.,Colin, Christophe.,...&Li, Tiegang.(2025).Insights into Quaternary iron fertilization dynamics in the western equatorial Pacific: Proxy archives offshore of northern Papua New Guinea.GLOBAL AND PLANETARY CHANGE,253,12.
MLA Xu, Zhaokai,et al."Insights into Quaternary iron fertilization dynamics in the western equatorial Pacific: Proxy archives offshore of northern Papua New Guinea".GLOBAL AND PLANETARY CHANGE 253(2025):12.

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来源：海洋研究所

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