Distribution and off–shelf transport of dissolved manganese in the East China Sea

To gain a better understanding of the geochemical behavior dissolved manganese (Mn) in marginal seas with respect to distribution and exchange fluxes, more than 200 water samples were collected East China Sea (ECS) May, August, October 2013. The concentration Mn ECS ranged from 1.1 81.5 nM, gradual decrease distance shore. Seasonal varies significantly Changjiang estuary, mainly regulated by freshwater input (Yangtze River) redox variations. continental shelf is an important source for adjacent waters, export Mn–rich coastal waters had effect on its re-distribution internal cycling. dynamic variation fluxes across 100– 200–m isobaths calculated aid Finite−Volume Coastal Ocean Model (FVCOM). exported (5.69 ± 1.14) × 10 8 mol/yr into East/Japan Tsushima Strait. Kuroshio surface receive additional (1.02 3.12) through cross–shelf process, which could potentially affect Northwest Pacific. Our data suggest that off-shelf transport essential biogeochemical cycles trace metals Pacific Sea.