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	海洋颗粒物POC/~(234)Th比值的控制机制; Mechanisms controlling POC /~(234)Th ratios in marine particles
	Deng FF(邓芳芳) ; Cai PH(蔡平河) ; Zhao DC(赵道辰) ; Li Q(李青)
	2014-12-20
关键词	POC/234Th比值 分粒径 控制因素 POC /234Th ratios marine particles controlling mechanisms
英文摘要	通过测定南海北部A1站四季上层500 M分粒径(1~10μM,10~53μM,>53μM)颗粒物上POC、234TH和228TH活度,发现中等粒径与大粒径的POC、234TH、228TH值比小粒径的POC、234TH、228TH低约一个量级。3种粒径POC/234TH(POC/228TH)比值的垂直分布皆呈现随深度增加而降低的趋势。统计分析POC/234TH、POC/228TH、234TH/228TH比值随粒径的变化,结果表明POC优先再矿化是影响POC/234TH比值变化的主要控制因素。; The controlling factor of the POC /234 Th ratios has been the focus of the research in the POC export flux.We measured the POC concentrations,234 Th,and228Th activities on size-fractionated class particles in the upper 500 m at station A1 during four cruises to the South China Sea.Results show that POC concentrations,234 Th and228Th activities on the medium and large particles were lower than those on the small particles by about an order of magnitude.The depth profiles of POC /234Th( POC /228Th) showed decreasing trend with depth.By analyzing the POC /234 Th,POC /228 Th,234Th /228 Th ratios versus particle sizethe,we concluded that preferential remineralization of POC is the main factor of controlling POC /234 Th ratio in marine particles.; 国家重点基础研究发展计划973项目(2009CB421203):中国近海碳收支、调控机理及生态效应研究
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/108350]
专题	环境生态－已发表论文
推荐引用方式 GB/T 7714	邓芳芳,蔡平河,赵道辰,等. 海洋颗粒物POC/~(234)Th比值的控制机制, Mechanisms controlling POC /~(234)Th ratios in marine particles[J],2014.
APA	邓芳芳,蔡平河,赵道辰,&李青.(2014).海洋颗粒物POC/~(234)Th比值的控制机制..
MLA	邓芳芳,et al."海洋颗粒物POC/~(234)Th比值的控制机制".(2014).

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