张晓慧, 李磊, 任景玲, 蒋增杰, 杜金洲. 桑沟湾溶解态铁的分布、季节变化及影响因素[J]. 海洋环境科学, 2019, 38(5): 656-662. DOI: 10.12111/j.mes20190502
引用本文: 张晓慧, 李磊, 任景玲, 蒋增杰, 杜金洲. 桑沟湾溶解态铁的分布、季节变化及影响因素[J]. 海洋环境科学, 2019, 38(5): 656-662. DOI: 10.12111/j.mes20190502
ZHANG Xiao-hui, LI Lei, REN Jing-ling, JIANG Zeng-jie, DU Jin-zhou. The distributions, seasonal variations and influence factors of dissolved iron in the Sanggou bay[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2019, 38(5): 656-662. DOI: 10.12111/j.mes20190502
Citation: ZHANG Xiao-hui, LI Lei, REN Jing-ling, JIANG Zeng-jie, DU Jin-zhou. The distributions, seasonal variations and influence factors of dissolved iron in the Sanggou bay[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2019, 38(5): 656-662. DOI: 10.12111/j.mes20190502

桑沟湾溶解态铁的分布、季节变化及影响因素

The distributions, seasonal variations and influence factors of dissolved iron in the Sanggou bay

  • 摘要: 采用催化动力学分光光度法对2011年4月、8月、10月和2012年1月桑沟湾溶解态铁(dissolved iron,DFe)的含量进行了测定。结果表明,桑沟湾4个季节DFe的平均值分别为3.8 ±0.7 nmol/L、3.3 ±1.8 nmol/L、2.6 ±1.0 nmol/L、1.8 ±0.6 nmol/L,存在明显的季节变化(t-test,p < 0.05,n=19)。桑沟湾DFe的平面分布主要呈现出河口和近岸浓度较高,随离岸距离的增加浓度逐渐降低的变化趋势。通过对桑沟湾周边河流、地下水DFe含量的分析及箱式模型的计算,结果表明桑沟湾海域DFe的主要来源包括河流、地下水的输入和大气沉降等;而其主要的汇为向黄海的输出以及养殖生物的吸收利用。DFe在桑沟湾的存留时间与大洋相比明显降低,可能与特殊的水文环境与养殖生物的吸收利用有关。

     

    Abstract: Four cruises were carried out in April, August, October 2011 and January 2012 in the Sanggou bay.The concentrations of dissolved iron (DFe) were measured by catalytic kinetic spectrophotometry.The average concentrations of DFe were 3.8 ±0.7 nmml/L, 3.3 ±1.8 nmol/L, 2.6 ±1.0 nmol/L, and 1.8 ±0.6 nmol/L respectively, which showed significant seasonal difference among the four cruises (t-test, p < 0.05, n=19).The distributions of DFe were similar during the study periods, with the high concentrations occupying the estuaries and coastal area, and decreased towards the offshore.A preliminary box model was established to estimate the budgets of DFe for the Sanggou Bay, which demonstrated that the major sources for DFe in the Sanggou bay included the inputs from riverine and groundwater discharge, atmospheric deposition.The main sinks included the output into Yellow Sea and the absorption or accumulation by biological activities.The residence time of DFe in the Sanggou bay is much shorter than the open ocean, which might be related to the special hydrological condition and the absorption concerning aquaculture activities.

     

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