| 夏季南黄海颗粒氮同位素分布特征及影响因素研究 |
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| 引用本文： | 晏茂军,董书航,钟晓松,宁晓燕,辛宇.夏季南黄海颗粒氮同位素分布特征及影响因素研究[J].海洋学报,2019,41(12):14-25. |
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| 作者姓名： | 晏茂军 董书航 钟晓松 宁晓燕 辛宇 |
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| 作者单位： | 中国海洋大学化学化工学院,山东青岛266100;中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266100 |
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| 基金项目： | 国家自然科学基金面上项目（41576082）；青岛海洋科学与技术国家实验室“鳌山人才”计划项目（2015ASTP-OS08）。 |
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| 摘 要： | 黄海是人类活动影响显著的半封闭陆架边缘海，在夏季存在特征鲜明的冷水团结构。为研究南黄海颗粒态氮的循环转化过程，本文通过分析2016年夏季南黄海水体颗粒物和表层沉积物的碳、氮含量及同位素，探讨南黄海近岸海域和冷水团海域颗粒物和表层沉积物氮含量、同位素的分布差异和影响因素。近岸海域颗粒氮(Particulate Nitrogen，PN)呈现出含量较高、氮同位素值(δ15NPN)垂向差异较小、沉积物总氮(Total Nitrogen，TN)含量较低且氮同位素值(δ15NTN)偏负的分布特征；冷水团海域PN呈现出含量低、δ15NPN垂向差异显著、沉积物TN含量高且δ15NTN偏正的分布特征。通过海底边界剪切应力模拟、环境因子分析并结合颗粒物与沉积物δ15N示踪分析，发现南黄海海域颗粒态氮及同位素分布主要受到水体/底边界动力过程影响，陆源输入和矿化过程亦共同参与调控。
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| 关 键 词： | 南黄海 颗粒氮 沉积物 氮同位素 |
| 收稿时间： | 2019/4/12 0:00:00 |
| 修稿时间： | 2019/7/22 0:00:00 |
A study on particulate nitrogen isotope distribution, isotope characteristics and controlling factors in the southern Yellow Sea in summer |
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| Yan Maojun,Dong Shuhang,Zhong Xiaosong,Ning Xiaoyan and Xin Yu.A study on particulate nitrogen isotope distribution, isotope characteristics and controlling factors in the southern Yellow Sea in summer[J].Acta Oceanologica Sinica (in Chinese),2019,41(12):14-25. |
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| Authors: | Yan Maojun Dong Shuhang Zhong Xiaosong Ning Xiaoyan and Xin Yu |
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| Institution: | 1.Collge of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100 China2.Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education, Ocean University of China, Qingdao 266100, China |
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| Abstract: | Yellow Sea is a semi-enclosed marginal sea that is significantly impacted by human activities. One of the major characteristics of Yellow Sea is the long-term existence of intensive cold water mass in summer. In order to study the cycling of particulate nitrogen in summer Yellow Sea, we analyzed the organic carbon and nitrogen content and isotope of the suspended particulate matter and of the surface sediments in South Yellow Sea in summer, 2016. We focus on the spatial variances in particulate nitrogen content, isotope character and the controlling factors respectively in coastal waters and cold water masse realm. In the coastal waters, the particulate nitrogen (PN) are comparatively higher and the vertical variances of nitrogen isotope (δ15NPN) are small, while total nitrogen content (TN) in coastal sediment are lower and the nitrogen isotope (δ15NTN) are mostly negative. In central south Yellow Sea where cold water masses exists, the PN is characterized of low content, significant vertical variances in δ15NPN, while TN in sediment are characterized of high content and positive δ15NTN. We further run bottom critical shear stress simulation and environmental factors analysis, and found out that the spatial variances of particulate nitrogen content and nitrogen isotopes in the South Yellow Sea was mainly controlled by the vertical mixing in water column, benthic boundary dynamic processes, and partially contributed by re-mineralization and terrestrial PN input. |
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| Keywords: | southern Yellow Sea particulate nitrogen marine sediment nitrogen isotope |
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