| 长江口及其邻近水域溶解无机氮的分布变化特征 |
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| 引用本文： | 潘胜军,沈志良.长江口及其邻近水域溶解无机氮的分布变化特征[J].海洋环境科学,2010,29(2). |
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| 作者姓名： | 潘胜军 沈志良 |
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| 作者单位： | 1. 中国科学院海洋研究所,海洋生态与环境科学重点实验室,山东,青岛,266071;中国科学院研究生院,北京,100039
2. 中国科学院海洋研究所,海洋生态与环境科学重点实验室,山东,青岛,266071 |
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| 基金项目： | 中国科学院知识创新工程重要方向资助项目(KZCX3-SW-232);;国家自然科学重点基金资助项目(50339040);;国务院三峡工程建设委员会资助项目(SX2004-010) |
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| 摘 要： | 根据2004年4个航次的调查资料,研究了长江口及其邻近水域溶解无机氮的分布变化特征。结果表明,高浓度溶解无机氮集中分布在河口附近。一般来讲,近岸硝酸盐浓度上层高于下层,远岸与之相反。由于生物和化学作用的影响,亚硝酸盐和铵盐垂直断面分布较为复杂。随着长江径流量的增加与减小、冲淡水势力范围的扩大与缩小,硝酸盐季节分布随之变化,然而,亚硝酸盐春季浓度较高,铵盐冬季浓度远大于其它季节。各月DIN/PO4-P比值远高于Redfield比值。与1985~1986年相比,20余年溶解无机氮增加了2.2倍,DIN/PO4-P比值升高了1.4倍,这主要取决于溶解无机氮浓度的增加。溶解无机氮在河口的转移除了生物活动的影响外,主要受海水稀释作用的控制。
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| 关 键 词： | 溶解无机氮 长江口 Redfield比值 分布 |
Distribution and variation of dissolved inorganic nitrogen in Changjiang Estuary and adjacent waters |
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| PAN Sheng-jun,SHEN Zhi-liang.Distribution and variation of dissolved inorganic nitrogen in Changjiang Estuary and adjacent waters[J].Marine Environmental Science,2010,29(2). |
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| Authors: | PAN Sheng-jun SHEN Zhi-liang |
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| Institution: | 1.Key Laboratory of Marine Ecology and Environmental Sciences;Institute of Oceanology;Chinese Academy of Sciences;Qingdao 266071;China;2.Graduate University of Chinese Academy of Sciences;Beijing 100039;China |
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| Abstract: | Based on the data obtained from the quarterly investigations in the Changjiang estuary and its adjacent water in 2004,the distributions and variations of DIN are discussed.The results show that the concentrations of DIN were higher near the Changjiang estuary.Generally,the concentration of NO3-N was higher in the surface than in the bottom in shore;the opposite distributions off shore.Due to biological and chemical effect,vertical section distribution of NO2-N and NH4-N is comparatively complicated.The dist... |
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| Keywords: | DIN Changjiang Estuary Redfield ratios distribution |
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