天津科技大学学报Issue(3)：57-61,5.DOI:10.13364/j.issn.1672-6510.20140121
长江口有色溶解有机物光谱特性及其示踪溶解有机碳研究
Optical Absorption Properties of Chromophoric Dissolved Organic Matter and the Tracing Implication of Dissolved Organic Carbon in the Yangtze River Estuary
摘要
Abstract
The optical absorption properties of chromophoric dissolved organic matter(CDOM)and the concentration of dissolved organic carbon(DOC)in surface water adjacent to the Yangtze River Estuary were studied from February to March 2014. The distribution of absorption coefficient(a330)of CDOM,spectral slope ratio(SR)and specific UV absorbance at 254,nm(SUVA254)were analyzed. The source of CDOM and the relationship betweena330 and DOC were discussed.a330 ranged from 0.45-3.10 m-1 with the mean value of(1.34±0.90)m-1in the survey area. The significant negative linear correla-tions between CDOM/DOC and salinity(R2=0.959,0,0.820,8)indicated CDOM and DOC in the Yangtze River Estuary were mainly terrestrial origin,and behaved conservatively during the mixing of fresh water with seawater. The negative rela-tionship between SUVA254and salinity suggested the aromatic property of terrestrial CDOM was higher than that of marine CDOM. The relationship betweenSR and salinity followed the simple mixture model,which suggested that the physical mix-ing process should be the dominant factor controllingSR in the studied area. The relationship between CDOM and DOC(R2=0.852,5)showed that CDOM was a promising tracer for terrestrial DOC.关键词
长江口/有色溶解有机物/溶解有机碳/光谱特性/示踪物质Key words
Yangtze River Estuary/chromophoric dissolved organic matter/dissolved organic carbon/optical absorp-tion properties/tracer分类
化学化工引用本文复制引用
胡素征,李桂菊,李奕洁,赵瑞华..长江口有色溶解有机物光谱特性及其示踪溶解有机碳研究[J].天津科技大学学报,2015,(3):57-61,5.基金项目
国家重点基础研究发展计划(973计划)资助项目(2013CB956600) （973计划）
