CAJ | 학술논문

【目的】海水中溶解有机碳(DOC)的研究对于碳的生物地球化学循环具有重要意义。通过对南黄海及长江口邻近海域夏季溶解有机碳的分布特征及其影响因素的研究,为进一步丰富我国陆架边缘海碳循环的研究提供数据支持和参考依据。【方法】利用高温燃烧氧化法对2013年夏季南黄海及长江口邻近海域水体中的 DOC 进行测定,初步分析夏季南黄海 DOC 的分布特征,并结合水文、化学、生物同步观测参数,探讨影响DOC 分布的主要因素。【结果】2013年夏季南黄海及长江口邻近海域 DOC 的含量为0.24~2.37 mg/L,平均值为(1.34±0.42)mg/L。整体而言,调查海区平面分布呈现北部浓度高,向南部逐渐降低,近岸浓度高远岸浓度低的分布趋势。DOC 的垂直分布呈现表层高,逐渐向底层减小,在底层又有所增加的趋势。【结论】研究海区 DOC 的分布受水团物理混合控制作用十分明显,近岸 DOC 高值区的分布主要受鲁北沿岸流和陆源输入影响,南部的低值区主要受黑潮表层水及台湾暖流的稀释作用影响,而生物作用对 DOC 的分布影响较弱。
【목적】해수중용해유궤탄(DOC)적연구대우탄적생물지구화학순배구유중요의의。통과대남황해급장강구린근해역하계용해유궤탄적분포특정급기영향인소적연구,위진일보봉부아국륙가변연해탄순배적연구제공수거지지화삼고의거。【방법】이용고온연소양화법대2013년하계남황해급장강구린근해역수체중적 DOC 진행측정,초보분석하계남황해 DOC 적분포특정,병결합수문、화학、생물동보관측삼수,탐토영향DOC 분포적주요인소。【결과】2013년하계남황해급장강구린근해역 DOC 적함량위0.24~2.37 mg/L,평균치위(1.34±0.42)mg/L。정체이언,조사해구평면분포정현북부농도고,향남부축점강저,근안농도고원안농도저적분포추세。DOC 적수직분포정현표층고,축점향저층감소,재저층우유소증가적추세。【결론】연구해구 DOC 적분포수수단물리혼합공제작용십분명현,근안 DOC 고치구적분포주요수로북연안류화륙원수입영향,남부적저치구주요수흑조표층수급태만난류적희석작용영향,이생물작용대 DOC 적분포영향교약。
Objective]Dissolved organic carbon (DOC)is the biggest organic carbon reservoir in the ocean,and is a extremely important component in oceanic carbon cycling.[Methods]The DOC concentrations were determined by high-temperature combustion with a TOC Ana-lyzer.The physical,chemical and biological parameters such as salinity,chlorophyll a and dissolved oxygen were also determined to find their effects on the DOC distribution.[Re-sults]Results suggested that DOC concentrations ranged from 0.24 to 2.37 mg/L with the average value of (1.34 ± 0.42 ) mg/L.DOC concentrations in the north area and coastal waters were relative higher than those in the south area and open sea of the central area.In the vertical profile,the concentrations of DOC were higher in surface layer and decreased with the depth but slightly increased in the bottom layer.[Conclusion]The distribution of dissolved organic carbon were obviously affected by the hydrological water mixing and partly by the terrigenous resources while the effect biological production on the distribution of DOC was comparatively insignificant.