Program
 
General Session 2: Marine & estuarine biogeochemistry
 

 
 
1030
The chromophoric organic matter in the surface sediment of Yellow China Sea
Tuesday 10th @ 1030-1050
Conference Hall
Weihong Zhao* , 1.Key Laboratory of Marine Ecology and Environmental Scinece, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China 2.Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
Yiliang Yao, 1.Key Laboratory of Marine Ecology and Environmental Scinece, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China 2.Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
Hui Miao, 1.Key Laboratory of Marine Ecology and Environmental Scinece, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China 2.Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
Presenter Email: whzhao@qdio.ac.cn
Sediments are considered the sources and sinks for the organic matter in aquatic environments, such as nutrients and pollutants, etc., affecting their distribution and fate. Owing to its preservation nature, the sediment organic matter may provide the wealth of information on the biogeochemical cycle of organic matter. In this study, the dissolved organic matter in the sediment pore water (PDOM), water extractable organic matter (WEOM), alkaline extractable organic matter (AEOM) and bottom water dissolved organic matter samples were collected to determine their fluorescence excitation-emission matrix spectroscopes (EEMs). Parallel factor analysis (PARAFAC) modeling was used to statistically decompose dissimilar fluorescence components from the EEM data. Four PARAFAC models were respectively established to modeling the four kinds of organic matter samples. The results showed that the emission wavelength of organic matter in bottom water DOM, PDOM, WEOM and AEOM had trend of red shift successively and humification features were gradually enhanced.  The organic components in the same phase had significant positive correlations with each other, declaring their similar sources, while there were not any significant correlations between the organic matters in different phases suggested the non-coupling among them. WEOM appeared the positive correlation with sediment organic matter (SOM) (0.579, P<0.05), indicating WEOM is the part of the SOM. More non-fluorescence organic matters in the SOM caused no high correlation coefficient between the WEOM and SOM.