Relationships between diurnal variations and mean daily concentrations of hydrochemical characteristics in a sea coastal zone.

Data on Amur Bay (the Sea of Japan) are used to show the existence of a dependence between the diurnal variability and the mean daily concentrations of various hydrochemical characteristics, which can be approximated by power function. The formation mechanism of such dependences is considered. Relationships between the parameters of such functions and variability of water salinity are obtained. The possible variation limits of such parameters in a coastal tidal zone of a sea, subject to the effect of coastal runoff. In the frontal mouth zone, one of the parameter (the exponent) linearly increases toward the river, thus reflecting the increase in the contribution of water dynamics to the diurnal variability of characteristics. The notion of variability of characteristics 'by salinity' is introduced. [ABSTRACT FROM AUTHOR]