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

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          Abstract

          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 a 355) 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 S R defined as S 275–295:S 350–400) 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 a 355. The values of S R were related to CDOM molecular weight (MW). The a 355, S R, 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 a 355 and S R of CDOM exhibited significant microlayer enrichment, with mean enrichment factors (EFs) of 1.72 and 1.62, respectively.

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          Author and article information

          Journal
          JOUC
          Journal of Ocean University of China
          Science Press and Springer (China )
          1672-5182
          07 May 2019
          01 April 2019
          : 18
          : 2
          : 383-393
          Affiliations
          1 Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
          2 Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
          3 The First Institute of Oceanography, State Oceanic Administration, Qingdao 266100, China
          Author notes
          *Corresponding author: YANG Guipeng
          Article
          s11802-019-3763-3
          10.1007/s11802-019-3763-3
          Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2019.

          The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

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          Self URI (journal-page): https://www.springer.com/journal/11802

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