Rainwater samples are collected from islands and seagoing cruises in the Yellow Sea and the East China Sea to determine concentration and to estimate deposition flux for dissolved silicate (DSi), together with other nutrients (e.g., nitrogen) by spectrophotometry. Concentrations of dissolved silicate in rainwater show considerable variation in time and space, with 0.5-15 mM at the Yellow Sea and the East China Sea. The (NO 3 À + NH 4 + )/DSi ratio in rainwater changes over up to 2 orders of magnitude, wit…
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