报告详情
Spatial variability and source identification of trace elements in aerosols from northwest Pacific marginal sea, Indian Ocean and South Pacific to Antarctica
编号：1280
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更新：2025-01-01 01:19:20
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张贴报告
报告开始：2025年01月14日 17:20（Asia/Shanghai）
报告时间：15min
所在会场：[S25] Session 25-IGAC-SOLAS: Chemistry and Physics at Surface Ocean and Lower Atmosphere [S25-P] IGAC-SOLAS: Chemistry and Physics at Surface Ocean and Lower Atmosphere
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摘要
Aerosols continuously transport trace elements (TEs) across long distances to the ocean, fueling
marine primary production and affecting global carbon cycles. Given the multiple sources and complex
transport mechanisms, field investigations of aerosol TEs on a global scale are significant for understanding
their role in marine biogeochemical cycles. Here, aerosol samples were collected along a 50,000‐km route
covering subtropical Northwest Pacific (NWP) marginal seas, Indian Ocean, Southern Ocean, Drake Passage,
and South Pacific. Samples were analyzed for the concentrations of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As,
Cd, Tl, and Pb. Aerosol TEs were distributed heterogeneously, with significantly lower concentrations over
remote oceans compared to coastal seas. Meanwhile, TE concentrations were generally high in the Indian
Ocean, moderate in the Southern Ocean, and low in the South Pacific. Cr, Ni, Cu, Zn, Cd, As, and Pb were
widely enriched, primarily originating from anthropogenic sources, while Al, Ti, V, Mn, Fe, and Co were
mainly from crustal sources in remote oceans. Moreover, specific sources of TEs were clarified, for example, Cr
and Ni were mainly from vehicle emissions. The estimated bulk TE deposition fluxes also varied spatially. For
instance, the greatest deposition of Fe occurs in the NWP marginal sea, followed by the Drake Passage, Indian
Ocean Sector of Southern Ocean, Pacific Sector of Southern Ocean, and South Pacific. This study contributes to
a deeper understanding of the complex dynamics of aerosol TEs in the global ocean, providing valuable
information for future studies and policy making regarding climate change.
关键词
trace elements
报告人
Wenkai Guan
博士后 / Postdoctoral Fellow Shanghai Jiao Tong University稿件作者
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重要日期
-
会议日期
01月13日
2025
至01月17日
2025
-
09月27日 2024
初稿截稿日期
-
01月17日 2025
注册截止日期
主办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
承办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
Department of Earth Sciences, National Natural Science Foundation of China
Department of Earth Sciences, National Natural Science Foundation of China
联系方式
- Kejing GU
- xm******@xmu.edu.cn
- +86*********
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