Submarine groundwater discharge as a significant export of dissolved inorganic carbon from a mangrove tidal creek to Qinglan Bay (Hainan Island, China)
Submarine groundwater discharge as a significant export of dissolved inorganic carbon from a mangrove tidal creek to Qinglan Bay (Hainan Island, China)
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海底地下水排放是红树林潮汐溪向清澜湾（中国海南岛）溶解无机碳的重要输出
DOI：
10.1016/j.csr.2021.104451
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发表时间：
2021-07
影响因子：
2.3
通讯作者：
Zhengang Cui
中科院分区：
文献类型：
--
作者：
Zijun Wu;Hongni Zhu;Dehao Tang;Yiqing Wang;Alyaa Zidan;Zhengang Cui
海底地下水排放（SGD）是溶解化学物质向海洋输送的重要途径。本研究对海南岛东北部无上游淡水输入的红树林潮溪潮汐循环中222Rn、不同碳种同位素（颗粒有机碳、POC、溶解有机碳、DOC、溶解无机碳、DIC）的浓度和同位素组成、物理化学参数进行了时序测量。结果表明，红树林碎屑是红树林潮溪水体POC和DOC的主要来源。有机质降解和陆源地下水排放是红树林潮滩沉积物孔隙水提供DIC的两个主要过程。定量评价表明，硫酸盐还原有机质降解过程产生的DIC占孔隙水DIC添加总量的59.8%，而陆源地下水排放产生的DIC占40.2%。利用222Rn质量平衡模型，我们量化了红树林潮沟SGD及其相关溶解碳的速率：SGD的平均速率约为165 (σ=68.73) cm d - 1， SGD衍生的DIC和DOC分别约为107和2.18 g C m - 2 d - 1。DIC是红树林潮沟向邻近青兰湾输出溶解碳的主要形式（约98%）。通过SGD的高DIC负载可能代表。红树林缺少碳，并对沿海海洋碳收支有重大影响。
Submarine groundwater discharge (SGD) is an important pathway for the transport of dissolved chemical substances to the ocean. In this study, we performed a time-series measurement of 222Rn, the concentrations and isotopic compositions of the different carbon species isotopes (particulate organic carbon, POC, dissolved organic carbon, DOC, dissolved inorganic carbon, DIC), physico-chemical parameters during a tidal cycle in a mangrove tidal creek without upstream freshwater inputs in northeastern Hainan Island, China. Our results show mangrove detritus provide the major sources of POC and DOC for the mangrove tidal creek water. Organic matter degradation and terrestrial groundwater discharge are two main processes of providing DIC for the pore water of the mangrove tidal flat sediments. A quantitative evaluation indicates that the amount of DIC production from the organic matter degradation process via sulfate reduction accounts for 59.8% of the total pore water DIC addition, while the proportion of DIC derived from terrestrial groundwater discharge is 40.2%. Using 222Rn mass balance model, we quantify the rates of SGD and its associated dissolved carbon: the average SGD rate in the mangrove tidal creek is approximately 165 (σ=68.73) cm d−1 and the SGD-derived DIC and DOC are approximately 107 and 2.18 g C m−2 d−1, respectively. DIC is the dominant form of dissolved carbon export (~98%) from mangroves tidal creek to the adjacent Qinglan Bay. The high DIC loading via SGD potentially represents the .mangrove missing carbon, and has significant implications for the coastal ocean carbon budget.
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DOI：
10.1016/j.scitotenv.2011.06.017
发表时间：
2011-09
期刊：
The Science of the total environment
影响因子：
--
作者：
Ni Su;Jinzhou Du;W. Moore;Sumei Liu;Jing Zhang
通讯作者：
Ni Su;Jinzhou Du;W. Moore;Sumei Liu;Jing Zhang
DOI：
10.1016/j.ecss.2019.106426
发表时间：
2019-11
期刊：
Estuarine, Coastal and Shelf Science
影响因子：
--
作者：
M. K. Dutta;Sanjeev Kumar;Rupa Mukherjee;N. Sharma;Avanti Acharya;P. Sanyal;Ravi Bhusan;S. Mukhopadhyay
通讯作者：
M. K. Dutta;Sanjeev Kumar;Rupa Mukherjee;N. Sharma;Avanti Acharya;P. Sanyal;Ravi Bhusan;S. Mukhopadhyay
影响因子：
5
作者：
D. Maher;B. Eyre
通讯作者：
D. Maher;B. Eyre
影响因子：
3
作者：
Böttcher, ME;Oelschläger, B;Rullkötter, J
通讯作者：
Rullkötter, J
影响因子：
2.7
作者：
Neetha Linto;J. Barnes;R. Ramachandran;J. Divia;P. Ramachandran;R. Upstill‐Goddard
通讯作者：
Neetha Linto;J. Barnes;R. Ramachandran;J. Divia;P. Ramachandran;R. Upstill‐Goddard