Factors controlling the distributions of dissolved organic matter in the East China Sea during summer

ABSTRACT: To determine the distribution of dissolved organic matter (DOM) in the East China Sea (ECS) during the summer, we measured the dissolved organic carbon (DOC) and nitrogen (DON), fluorescent dissolved organic matter (FDOM), and chlorophyll a (Chl. a) in the upper 100-m layer of this region during July and September 2015. The DOC (r2 = 0.72 and 0.78 in July and September, respectively) and DON (r2 = 0.43 and 0.33) were significantly correlated with salinity, suggesting that the river is the primary origin of DOM. However, we found that at a DOC “pulse” under a salinity ranging from 24 to 35, the extrapolating DOC values (304 ± 11 μM) were twice higher than those with a salinity of close to 0, as found in a previous study. The excess DOC concentration seemed to be attributed to the microbial

SUBMITTER: Kim J 

PROVIDER: S-EPMC7366708 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature