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Concentrations of nutrients (NO3−, NO2−, NH4+, PO43−, and dissolved SiO2) were examined in three North China estuaries—the Luanhe, Shuangtaizihe, and Yalujiang. These riverine-estuarine systems provide distinct geographic and hydrodynamic conditions, that is, a shallow water zone embraced by shoals and sandbars (Luanhe), the confluence of two streams in the upper estuary with different water and...
Concentrations of nutrient elements (e.g. NO -3 , NO -2 , NH -4 , PO -34 and SiO 2 etc.) and sulphate in atmospheric wet depositions (rain and snow) over the Yellow Sea (Huanghai) were examined based on the observations at two land-base stations. The results show a variability over one to two orders of magnitude of element concentrations,...
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