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Appl Opt. 1988 Sep 15;27(18):3887-94. doi: 10.1364/AO.27.003887.

Effect of dissolved NaCl, MgCl(2), and Na(2)SO(4) in seawater on the optical attenuation in the region from 430 to 630 nm.


The split-pulse laser method is used to reinvestigate the optical attenuation of distilled water in the region from 430 to 630 nm. The studies are then extended to ionic solutions of NaCl, MgCl(2), and Na(2)SO(4), these salts forming the major constituents of seawater. The effect of the concentration of these constituents on optical attenuation is investigated. Further, optical attenuation studies are carried out for the region from 430 to 630 nm for an aqueous solution prepared with all the major constituents in the same proportions as in natural seawater. These values are then compared with values obtained for natural seawater. The relative role of dissolved salts and suspended particles on optical attenuation in seawater is discussed. The lowest attenuation is observed at ~450 nm for all solutions and is found to coincide with that for distilled water.

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