长江口盐度梯度下有色溶解有机物的分布、来源与季节变化

徐亚宏; 姚鹏; 苏荣国; 赵彬

doi:10.3969/j.issn.0253-4193.2017.06.003

长江口盐度梯度下有色溶解有机物的分布、来源与季节变化

doi: 10.3969/j.issn.0253-4193.2017.06.003

1.
中国海洋大学海洋化学理论与工程技术教育部重点实验室, 山东青岛 266100;中国海洋大学化学化工学院, 山东青岛 266100
2.
中国海洋大学海洋化学理论与工程技术教育部重点实验室, 山东青岛 266100
3.
中国海洋大学化学化工学院, 山东青岛 266100

基金项目: 国家重点研发计划项目（2016YFA0600902）；国家自然科学基金项目（41676063，41620104001，41521064）。

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出版历程
- 收稿日期: 2016-10-08
- 修回日期: 2016-12-15

Distribution, sources, and seasonal variation of colored dissolved organic matter along salinity gradients in the Changjiang Estuary

1.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
3.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China

摘要

摘要: 通过测定有色溶解有机物（CDOM）的吸收光谱和荧光光谱研究了2015年3月和7月长江口盐度梯度下CDOM的分布、组成、来源及河口混合行为等。利用激发发射矩阵荧光光谱（EEMs）并结合平行因子分析（PARAFAC），研究了CDOM的荧光组分特征，共识别出两类4个荧光组分组成，即类腐殖质荧光组分C1（260，375/490 nm）、C2（365/440 nm）、C3（330/400 nm）及类蛋白质荧光组分C4（295/345 nm）。结果表明，3月和7月，4种荧光组分的分布模式与总荧光强度都基本一致：从口内到口外，先升高后降低，且4种组分都在河口呈现不保守混合行为，在最大浑浊带处存在添加过程，达到峰值，在口外有去除过程。3月腐殖化指数HIX范围在1.12~7.19，而7月HIX的范围在0.87~6.71；生物指数BIX在3月范围在0.76~1.11，7月为0.62~1.15，表明3月CDOM的腐殖化程度较7月高，而自生贡献比例较7月略低。3月吸收系数α（355）的平均值为0.55 m^-1 ，7月的略高，为0.61 m^-1，表明7月长江口CDOM的含量略高。光谱斜率比值S_R的季节性变化不大，都是近岸低，远岸高，表明CDOM的平均分子质量从口内到口外在逐渐增加。
- 长江口 /
- 最大浑浊带 /
- 有色溶解有机物 /
- 三维荧光-平行因子分析 /
- 吸收光谱 /
- 季节变化
Abstract: Absorption and fluorescence spectroscopies were used to examine the distribution, composition, sources and mixing behavior of colored dissolved organic matter (CDOM) in the Changjiang estuary in March and July 2015. The characteristics of fluorescent components of CDOM in the Changjiang Estuary were determined by fluorescence excitation emission matrix spectroscopy (EEMs) combined with parallel factor analysis (PARAFAC).Three humic-like components, i.e., C1(260,375/490 nm), C2(365/440 nm) and C3(330/400 nm) and one protein-like component C4 (295/345 nm) were identified by EEMs-PARAFAC. The distribution and non-conservative mixing behavior of these four components were consistent with the total fluorescence intensity (TFI) both in March and July 2015, first increasing and then gradually decreasing from the inner estuary to outside the estuary, with the additional behavior and highest value observed at Turbidity Maximum Zone and removal process outside the estuary. Ranging from 1.12 to 7.19 in March and 0.87 to 6.71 in July, the humification index (HIX) values showed that CDOM in March had a higher degree of humification than that in July. The biological index (BIX) values ranged from 0.76 to 1.11 and 0.62 to 1.15 in March and July respectively, suggesting a greater contribution of biological activities to CDOM in July. In March, The average value of α(355) was 0.55 m^-1, lower than that in July (0.61 m^-1), reflecting higher content of CDOM in summer. The seasonal variation of S_R was not obvious, increasing along the salinity in both seasons, which indicated that the average molecular weight of CDOM increased from the inside to the outside of the Changjiang Estuary.
- Changjiang Estuary /
- turbidity maximum zone /
- CDOM /
- EEMs-PARAFAC /
- absorption spectroscopy /
- seasonal variation

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参考文献(46)

Whitehead R F, De Mora S, Demers S, et al. Interactions of ultraviolet-B radiation, mixing, and biological activity on photobleaching of natural chromophoric dissolved organic matter: A mesocosm study[J]. Limnology and Oceanography, 2000, 45(2): 278-291.

Green S A, Blough N V. Optical absorption and fluorescence properties of chromophoric dissolved organic matter in natural waters[J]. Limnology and Oceanography, 1994, 39(8): 1903-1916.

Bai Ying, Su Rongguo, Shi Xiaoyong. Assessing the dynamics of chromophoric dissolved organic matter in the southern Yellow Sea by excitation-emission matrix fluorescence and parallel factor analysis (EEM-PARAFAC)[J]. Continental Shelf Research, 2014, 88: 103-116.

Yamashita Y, Panton A, Mahaffey C, et al. Assessing the spatial and temporal variability of dissolved organic matter in Liverpool Bay using excitation-emission matrix fluorescence and parallel factor analysis[J]. Ocean Dynamics, 2011, 61(5): 569-579.

Vodacek A, Hogel F E, Swift R N, et al. The use of in situ and airborne fluorescence measurements to determine UV absorption coefficients and DOC concentrations in surface waters[J]. Limnology and Oceanography, 1995, 40(2): 411-415.

Guo Weidong, Yang Liyang, Zhai Weidong, et al. Runoff-mediated seasonal oscillation in the dynamics of dissolved organic matter in different branches of a large bifurcated estuary—The Changjiang Estuary[J]. Journal of Geophysical Research: Biogeosciences, 2014, 119(5): 776-793.

Yan Lihong, Su Rongguo, Zhang Chuansong, et al. Assessing the dynamics of chromophoric dissolved organic matter (CDOM) in the Yellow Sea and the East China Sea in autumn by EEMs-PARAFAC[J]. Science China Chemistry, 2012, 55(12): 2595-2609.

Rochelle-Newall E J, Fisher T R. Chromophoric dissolved organic matter and dissolved organic carbon in Chesapeake Bay[J]. Marine Chemistry, 2002, 77(1): 23-41.

Stedmon C A, Markager S, Bro R. Tracing dissolved organic matter in aquatic environments using a new approach to fluorescence spectroscopy[J]. Marine Chemistry, 2003, 82(3/4): 239-254.

黄昌春, 李云梅, 王桥, 等. 基于三维荧光和平行因子分析法的太湖水体CDOM组分光学特征[J]. 湖泊科学, 2010, 22(3): 375-382. Huang Changchun, Li Yunmei, Wang Qiao, et al. Components optical property of CDOM in Lake Taihu based on three-dimensional excitation emission matrix fluorescence[J]. Journal of Lake Sciences, 2010, 22(3): 375-382.

陈欣, 张霄宇, 雷惠. 长江口CDOM的光谱吸收特征以及DOC物源示踪意义[J]. 海洋环境科学, 2012, 31(5): 3-8. Chen Xin, Zhang Xiaoyu, Lei Hui. Optical absorption properties of CDOM and tracing implication of DOC in the Changjiang Estuary[J]. Marine Environmental Science, 2012, 31(5): 3-8.

D'Sa E J, Goes J I, Gomes H, et al. Absorption and fluorescence properties of chromophoric dissolved organic matter of the eastern Bering Sea in the summer with special reference to the influence of a Cold Pool[J]. Biogeosciences Discussions, 2013, 10(12): 19109-19154.

Milliman J D, Farnsworth K L. River Discharge to the Coastal ocean: a Global Synthesis[M]. Cambridge: Cambridge University Press, 2011.

林金祥, 王宗山. 关于长江冲淡水异常变化的分析[J]. 海洋科学进展, 1985, 3(4): 15-23. Lin Jinxiang, Wang Zongshan. On the analysis of anomalaus change of fresh water tongue of Changjiang river[J]. Advances in Marine Science, 1985, 3(4): 15-23.

毛汉礼, 甘子钧, 蓝淑芳. 长江冲淡水及其混合问题的初步探讨[J]. 海洋与湖沼, 1963, 5(3): 183-206. Mao Hanli, Gan Zijun, Lan Shufang. A preliminary study of the Yangtze diluted water and its mixing processes[J]. Oceanologia et Limnologia Sinica, 1963, 5(3): 183-206.

潘慧慧, 姚鹏, 赵彬, 等. 基于水淘选分级的长江口最大浑浊带附近颗粒有机碳的来源、分布和保存[J]. 海洋学报, 2015, 37(4): 1-15. Pan Huihui, Yao Peng, Zhao Bin, et al. Sources, distribution and preservation of size-fractionated particulate organic carbon in the turbidity maximum zone of the Changjiang Estuary based on water elutriation[J]. Haiyang Xuebao, 2015, 37(4): 1-15.

范冠南, 毛志华, 陈鹏, 等. 长江口及其邻近海域CDOM光谱吸收特性分析[J]. 海洋学研究, 2013, 31(1): 53-58. Fan Guannan, Mao Zhihua, Chen Peng, et al. Optical characteristics of Colored Dissolved Organic Matter (CDOM) in Changjiang River Estuary and its adjacent sea areas[J]. Journal of Marine Sciences, 2013. 31(1): 53-58.

朱伟健, 沈芳, 洪官林. 长江口及邻近海域有色溶解有机物(CDOM)的光学特性[J]. 环境科学, 2010, 31(10): 2292-2298. Zhu Weijian, Shen Fang, Hong Guanlin. Optical characteristics of colored dissolved organic material (CDOM) in Yangtze Estuary[J]. 2010, 31(10): 2292-2298.

王翔, 杨红, 孔德星, 等. 长江口外海水中有色溶解有机物(CDOM)的光吸收特性[J]. 应用海洋学学报, 2010, 29(4): 518-524. Wang Xiang, Yang Hong, Kong Dexing, et al. Optical absorption properties of chromophoric dissolved organic matter in the seawater of outer Yangtze Estuary[J]. Journal of Oceanography in Taiwan Strait, 2010, 29(4): 518-524.

李奕洁, 宋贵生, 胡素征, 等. 2014年夏季长江口有色溶解有机物(CDOM)的分布、光学特性及其来源探究[J]. 海洋与湖沼, 2015, 46(3): 670-678. Li Yijie, Song Guisheng, Hu Suzheng, et al. Optical characterization, distribution and sources of chromophoric dissolved organic material (CDOM) in the Changjiang River estuary in July 2014[J]. Oceanologia et Limnologia Sinica, 2015, 46(3): 670-678.

Wada S, Aoki M N, Tsuchiya Y, et al. Quantitative and qualitative analyses of dissolved organic matter released from Ecklonia cava, Kjellman, in Oura Bay, Shimoda, Izu Peninsula, Japan[J]. Journal of Experimental Marine Biology and Ecology, 2007, 349(2): 344-358.

Hong Huasheng, Wu Jingyu, Shang Shaoling, et al. Absorption and fluorescence of chromophoric dissolved organic matter in the Pearl River Estuary, South China[J]. Marine Chemistry, 2005, 97(1/2): 78-89.

Markager S, Vincent W F. Spectral light attenuation and the absorption of UV and blue light in natural waters[J]. Limnology and Oceanography, 2014, 45(3): 642-650.

肖隆庚, 陈文松, 陈国丰, 等. 中国南海CDOM三维荧光光谱特征研究[J]. 环境科学学报, 2014, 34(1): 160-167. Xiao Longgeng, Chen Wensong, Chen Guofeng, et al. Fluorescence excitation-emission matrix spectroscopy of chromophoric dissolved organic matter in the South China Sea[J]. Acta Scientiae Circumstantiae, 2014, 34(1): 160-167.

Ohno T. Fluorescence inner-filtering correction for determining the humification index of dissolved organic matter[J]. Environmental Science & Technology, 2002, 36(4): 742-746.

Huguet A, Vacher L, Relexans S, et al. Properties of fluorescent dissolved organic matter in the Gironde Estuary[J]. Organic Geochemistry, 2009, 40(6): 706-719.

Stedmon C A, Markager S. Resolving the variability in dissolved organic matter fluorescence in a temperate estuary and its catchment using PARAFAC analysis[J]. Limnology and Oceanography, 2005, 50(2): 686-697.

Yamashita Y, Jaffé R, Maie N, et al. Assessing the dynamics of dissolved organic matter (DOM) in coastal environments by excitation emission matrix fluorescence and parallel factor analysis (EEM-PARAFAC)[J]. Limnology and Oceanography, 2008, 53(5): 1900-1908.

Coble P G. Characterization of marine and terrestrial DOM in seawater using excitation-emission matrix spectroscopy[J]. Marine Chemistry, 1996, 51(4): 325-346.

Li Weihua, Sheng Guoping, Lu Rui, et al. Fluorescence spectral characteristics of the supernatants from an anaerobic hydrogen-producing bioreactor[J]. Applied Microbiology and Biotechnology, 2011, 89(1): 217-224.

Fellman J B, Petrone K C, Grierson P F. Source, biogeochemical cycling, and fluorescence characteristics of dissolved organic matter in an agro-urbastal and Shelf Science, 2010, 87(1): 156-162.

Shank G C, Zepp R G, Whitehead R F, et al. Variations in the spectral properties of freshwater and estuarine CDOM caused by partitioning onto river and estuarine sediments[J]. Estuarine, Coastal and Shelf Science, 2005, 65(1/2): 289-301.

Helms J R, Stubbins A, Ritchie J D, et al. Absorption spectral slopes and slope ratios as indicators of molecular weight, source, and Photobleaching of chromophoric dissolved organic matter[J]. Limnology and Oceanography, 2007, 53(3): 955-969.chromophoric dissolved organic matter in a turbid estuary: roles of multiple biogeochemical processes[J]. Estuarine, Coastal and Shelf Science, 2013, 133: 285-292.

Zhang Yunlin, Van Dijk M A, Liu Mingliang, et al. The contribution of phytoplankton degradation to chromophoric dissolved organic matter (CDOM) in eutrophic shallow lakes: field and experimental evidence[J]. Water Research, 2009, 43(18): 4685-4697.

潘慧慧. 基于水淘选分级的长江口颗粒有机碳的分布、来源和降解特征[D]. 青岛: 中国海洋大学, 2015. Pan Huihui. Sources, distribution, and preservation of size-fractionated particulate organic carbon in the Changjiang Estuary based on water elutriation[D]. Qingdao: Ocean University of China, 2015.

郭卫东, 黄建平, 洪华生, 等. 河口区溶解有机物三维荧光光谱的平行因子分析及其示踪特性[J]. 环境科学, 2010, 31(6): 1419-1427. Guo Weidong, Huang Jianping, Hong Huasheng, et al. Resolving excitation emission matrix spectroscopy of estuarine CDOM with parallel factor analysis and its application in organic pollution monitoring[J]. Environmental Science, 2010, 31(6): 1419-1427.

程远月, 郭卫东, 胡明辉. 近岸沉积物再悬浮期间所释放溶解有机物的荧光特征[J]. 地球化学, 2008, 37(1): 51-58. Cheng Yuanyue, Guo Weidong, Hu Minghui. Fluorescence characteristics of dissolved organic matter released from estuarine sediments during resuspension[J]. Geochimica, 2008, 37(1): 51-58.

Huguet A, Vacher L, Saubusse S, et al. New insights into the size distribution of fluorescent dissolved organic matter in estuarine waters[J]. Organic Geochemistry, 2010, 41(6): 595-610.

Dixon J L, Osburn C L, Paerl H W, et al. Seasonal changes in estuarine dissolved organic matter due to variable flushing time and wind-driven mixing events[J]. Estuarine, Coastal and Shelf Science, 2014, 151: 210-220.

Sun Qiyuan, Wang Chao, Wang Peifang, et al. Absorption and fluorescence characteristics of chromophoric dissolved organic matter in the Yangtze Estuary[J]. Environmental Science and Pollution Research International, 2014, 21(5): 3460-3473.

周倩倩, 苏荣国, 白莹, 等. 舟山渔场有色溶解有机物(CDOM)的三维荧光-平行因子分析[J]. 环境科学, 2015, 36(1): 163-171. Zhou Qianiqian, Su Rongguo, Bai Ying, et al. Characterization of Chromophoric dissolved organic matter (CDOM) in Zhoushan fishery using excitation-emission matrix spectroscopy (EEMs) and parallel factor analysis (PARAFAC)[J]. Environmental Science, 2015, 36(1): 163-171.

白莹. 黄东海春秋季有色溶解有机物(CDOM)的分布特征及季节变化的研究[D]. 青岛: 中国海洋大学, 2014. Bai Ying. The study on distribution and seasonal changes of chromophoric dissolved organic matter in spring and autumn in the Yellow Sea and the East China Sea[D]. Qingdao: Ocean University of China, 2014.

周倩倩. 黄渤海夏秋季有色溶解有机物(CDOM)的分布特征及季节变化的研究[D]. 青岛: 中国海洋大学, 2015. Zhou Qianqian. The study on distribution and seasonal changes of chromophoric dissolved organic matter in summer and autumn in the Bohai Sea and the Yellow Sea[D]. Qingdao: Ocean University of China, 2015.

Zhang Xiaoyu, Wang Lixia, Yu Le, et al. Conservative behavior of CDOM optical properties in Changjiang River Estuary, China[C]//Proceedings of the 2nd International Conference on Earth Observation for Global Changes. Chengdu: International Society for Optics and Photonics, 2009.

Murphy K R, Stedmon C A, Waite T D, et al. Distinguishing between terrestrial and autochthonous organic matter sources in marine environments using fluorescence spectroscopy[J]. Marine Chemistry, 2008, 108(1/2): 40-58.

Stedmon C A, Osburn C L, Kragh T. Tracing water mass mixing in the Baltic-North Sea transition zone using the optical properties of coloured dissolved organic matter[J]. Estuarine, Co

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