Vertical profiles suspended particles

Suspended bed material load, which consists of coarser particles which are intermittently moved from the river bed into the flow profile. Typically concentrations vary logarithmically with depth, with mean concentration for a vertical profile being seen at 0.6 X depth, measured from the flow surface. Concentrations also vary across the river section, being highest in the centre, where flow velocity is highest, and lowest at the river banks. 

Fig. 20. Vertical profiles of La, Ce and Nd concentrations from the acetic acid digestion of suspended particles from the Sargasso Sea. The Ce anomaly profile is also shown. From Sholkovitz et al. (1994).

As developed in sect. 6.2, Sholkovitz et al. (1994) noted that there is systematic fractionation between the surface coatings of suspended particles and filtered seawater (fig. 17). Observation of surface coatings allows insight into particle/solution interactions responsible for fractionation. Vertical profiles of the La/Nd and La/Yb ratios of filtered... 

The effect of aerosol on cloudiness consists in the following (i) a certain part of aerosols acts as condensation nuclei, causing an increase in the amount of suspended small droplets, and (ii) aerosol particles, caught by clouds, change the radiative properties of clouds and, consequently, the vertical temperature profile. In its turn, this affects the conditions of the formation of cloudiness and of its subsequent transformation. 

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