海洋溶解有机碳储库的气候效应及其定量重建研究进展

刘舒薇; 田军; 李骁麟; 杜金龙

doi:10.16562/j.cnki.0256-1492.2025031001

海洋溶解有机碳储库的气候效应及其定量重建研究进展

1.
同济大学海洋地质全国重点实验室，上海 200092

2.
厦门大学海洋生物地球化学全国重点实验室，厦门 361100

基金项目: 国家自然科学基金基础科学中心项目“海洋碳汇与生物地球化学过程研究”（42188102）；国家重点研发计划项目“新近纪晚期印太暖池区海道闭合与高纬冰盖演变的耦合机制研究”（2023YFF0803900）；国家自然科学基金重点项目“探索晚新生代太平洋中深层经向翻转流与气候演变冰期旋回的关系”（42030403）；海洋负排放（ONCE）国际大科学计划

详细信息

作者简介: 刘舒薇（2000—），女，硕士研究生，海洋科学专业，E-mail：1487238496@qq.com

通讯作者: 田军（1974—），男，博士，教授，主要从事海洋地质、古海洋学研究，E-mail：tianjun@tongji.edu.cn

中图分类号: P736

收稿日期: 2025-03-10

修回日期: 2025-04-17

刊出日期: 2025-08-28

Research progress on climatic effects of marine dissolved organic carbon pool and its quantitative reconstruction

1.
State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China

2.
State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361100, China

More Information

Corresponding author: TIAN Jun, tianjun@tongji.edu.cn

Received Date: 10 March 2025

Revised Date: 17 April 2025

Publish Date: 28 August 2025

摘要

摘要:
海洋溶解有机碳储库是地球碳循环的重要组成部分，庞大的储量与缓慢周转的特征使其成为调节全球气候的关键缓冲系统。溶解有机碳储库在长时间尺度上的气候效应主要体现在海洋碳同位素的异常记录中。在定量重建研究方面，数值模型的发展实现了对DOC生产-输运-降解过程的多尺度耦合模拟，但理想的参数化方案（如细菌转化效率、光降解速率等）仍可以通过原位观测与培养实验进行优化，以实现更符合现实的模拟结果。DOC储库气候效应和地质演变定量研究仍然薄弱。未来可以聚焦单一重点环境参数，比如溶解有机碳的表观降解系数，提升模拟结果的精度和置信度，重建长时间尺度上溶解有机碳库的地质演变，为理解碳循环与气候变化的耦合关系提供新视角。
- 溶解有机碳储库 /
- 气候效应 /
- 定量重建 /
- 参数化方案 /
- 地质演变
Abstract:
The marine dissolved organic carbon (DOC) reservoir is one of the most important parts of the Earth's carbon cycle. Its vast storage capacity and slow turnover rate make it a key buffering system for regulating global climate. The climatic effects of the DOC reservoir over long timescales are primarily reflected in anomalies recorded in marine carbon isotopes. The development of box models has enabled multi-scale coupled simulations of DOC production, transport, and degradation processes. However, ideal parameterization schemes, such as bacterial degradation efficiency and photodegradation efficiency, can still be optimized through in situ observations and culture experiments to achieve more realistic simulation results. Research on the climatic effects and geological evolution of the DOC reservoir remains quantitatively underdeveloped. Future studies shall focus on specific environmental parameters, such as the apparent degradation coefficient of DOC, to enhance the accuracy and confidence of simulations and facilitate the reconstruction of the geological evolution of the DOC reservoir over long timescales, offering new perspectives for understanding the relationship between carbon cycle and climate change.
- DOC reservoir /
- climatic effects /
- quantitative reconstruction /
- parameterization scheme /
- geological evolution

HTML全文

图 1 碳储库储量及δ¹³C平均值^[11]

Figure 1.

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图 2 ¹²C和¹⁶O在冰期−间冰期的海陆转换^[11]

Figure 2.

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图 3 全球溶解有机碳平面分布图

Figure 3.

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图 4 经向大西洋（上图）、太平洋（中间）和印度洋（下图）DOC浓度垂向断面图

Figure 4.

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图 5 埃迪卡拉纪沉积碳酸盐碳同位素δ¹³C组成

Figure 5.

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图 6 0～2 Ma大洋δ¹³C模拟

Figure 6.

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图 7 DOC的源和汇^[69]

Figure 7.

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图 8 DOC定量重建模型示意图

Figure 8.

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表 1 溶解有机碳分类

Table 1. Classification of dissolved organic carbon

DOC类型	停留时间	储量
不稳定溶解有机碳，LDOC	几小时至几天	＜200 Tg C
半不稳定溶解溶解有机碳，SLDOC	几周至几个月	～600 Tg C
半惰性溶解有机碳，SRDOC	十年以上	～1400 Tg C
惰性溶解有机碳，RDOC	千年以上	～63000 Tg C

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