SPATIAL VARIABILITY OF COLORED DISSOLVED ORGANIC MATTER IN THE YELLOW SEA AND THE EAST CHINA SEA IN WINTER
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 (defined as 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 (SR) 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) and photochemically induced shifts in MW. The a355, SR, and chlorophyll a in 37 samples collected from the surface microlayer were significantly corrected with those in 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.
Zhang, J., Ocean University of China, China, email@example.com
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall
Presentation is given by student: No