Concentration and Characterization of Colored Dissolved Organic Matter in the Surface Microlayer and Subsurface Water of the Yellow Sea and the East China Sea

被引：0
作者：
ZHANG Jing [1 ]
ZHAO Junjie [1 ]
YANG Guipeng [1 ,2 ]
LIU Weifeng [3 ]
机构：
[1] Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China
[2] Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology
[3] The First Institute of Oceanography,State Oceanic Administration
来源：
Journal of Ocean University of China | 2019年 / 18卷 / 02期
关键词：
colored dissolved organic matter(CDOM); absorption coefficient; spectral slope ratio; Yellow Sea; East China Sea;
D O I：
暂无
中图分类号：
P734 [海洋化学];
学科分类号：
070702 ;
摘要：
The distribution and chemical properties of colored dissolved organic matter（CDOM） in the Yellow Sea and the East China Sea during December 2011-January 2012 were investigated. The input of freshwater and biological activities had an evident influence on the CDOM levels(characterized by the light absorption coefficient at the wavelength of 355 nm a355) in the study area. The spatial distribution of CDOM levels displayed a gradually decreasing trend from the coastal waters(0.37 m-1) to the open sea(0.18 m-1). The spectral slope ratio(the slope ratio SR defined as S275-295:S350-400) during the cruise was correlated with salinity, and exhibited a large variation from inshore（average of 2.515） to offshore sites（average of 5.327） compared with the distribution of a355. The values of SR were related to CDOM molecular weight（MW）. The a355, SR, and chlorophyll a in 37 samples collected from the surface microlayer were significantly correlated with those in the corresponding subsurface water samples, implying a strong exchange action between the microlayer and bulk water. The a355 and SR of CDOM exhibited significant microlayer enrichment, with mean enrichment factors（EFs） of 1.72 and 1.62, respectively.
引用
收藏
页码：383 / 393
页数：11
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