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太湖中颗粒有机碳对水体固有光学特性的影响

姜广甲 苏 文 马荣华 段洪涛 蔡伟叙 黄楚光

姜广甲, 苏 文, 马荣华, 段洪涛, 蔡伟叙, 黄楚光. 太湖中颗粒有机碳对水体固有光学特性的影响[J]. 环境科学研究, 2015, 28(2): 234-241.
引用本文: 姜广甲, 苏 文, 马荣华, 段洪涛, 蔡伟叙, 黄楚光. 太湖中颗粒有机碳对水体固有光学特性的影响[J]. 环境科学研究, 2015, 28(2): 234-241.
JIANG Guangjia, SU Wen, MA Ronghua, DUAN Hongtao, CAI Weixu, HUANG Chuguang. Effects of Particulate Organic Carbon on Inherent Optical Properties of Taihu Lake[J]. Research of Environmental Sciences, 2015, 28(2): 234-241.
Citation: JIANG Guangjia, SU Wen, MA Ronghua, DUAN Hongtao, CAI Weixu, HUANG Chuguang. Effects of Particulate Organic Carbon on Inherent Optical Properties of Taihu Lake[J]. Research of Environmental Sciences, 2015, 28(2): 234-241.

太湖中颗粒有机碳对水体固有光学特性的影响

基金项目: 中国科学院知识创新工程方向性项目(KZCX2-YW-QN311);国家自然科学基金项目(40871168,40801137)

Effects of Particulate Organic Carbon on Inherent Optical Properties of Taihu Lake

  • 摘要: 利用2011年5期太湖现场测量数据和室内分析数据,通过建立ρ(POC)(POC为颗粒有机碳)与ap(λ)(颗粒物吸收系数)、bbp(510)(总颗粒物的后向散射系数)的相关关系,评价了POC对水体固有光学特性的影响. 结果表明,太湖水体ρ(POC)时空变化显著,各期样品平均值在1 558.06~5 281.09 mg/m3之间变化. ρ(POC)与ap(λ)具有较好的相关关系,特别是在浮游植物色素强烈吸收的波段(605~700 nm),各期数据的相关系数均在0.9以上;但ρ(POC)与bbp(510)的相关性较差(R2=0.04, P=0.02). 进一步分析ρ(POC)对颗粒物的色素部分和非色素部分的影响发现,ρ(POC)与色素颗粒物吸收系数〔aph(665)〕的相关性很好(R2=0.82),而与非色素颗粒物吸收系数相关性较差. ρ(NPOC)(NPOC为非有机碳颗粒物)与bbp(510)的相关性较好(R2>0.60),说明太湖水体POC对浮游植物色素的吸光特性有重要影响,而NPOC影响了水体的后向散射特性.

     

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  • 刊出日期:  2015-02-25

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