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Optics Express

Optics Express

  • Vol. 17, Iss. 7 — Mar. 30, 2009
  • pp: 5698–5710

Scattering by pure seawater: Effect of salinity

Xiaodong Zhang, Lianbo Hu, and Ming-Xia He  »View Author Affiliations

Optics Express, Vol. 17, Issue 7, pp. 5698-5710 (2009)

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A theoretical model was developed estimating the scattering by seawater that are due to concentration fluctuation. Combining with the model proposed for density fluctuation (Optics Express, 17, 1671, 2009), we evaluated the overall effect of sea salts on the scattering. The variation of seawater scattering with the salinity is a combination of two factors: decreasing contribution due to density fluctuation and increasing contribution due to concentration fluctuation, with the latter effect dominating. The trend is, however, slightly non-linear and the linear adjustment of scattering with salinity that is frequently used would lead to an underestimate by an average of 2%. The results estimated at S = 38.4‰ agree with the measurements by Morel (Cahiers Oceanographiques, 20, 157, 1968) with an average difference of 1%, well within his experimental error of 2%. The spectral signature also varies with salinity, with the power-law slope increasing from -4.286 to -4.306 for salinity from 0 to 40‰.

© 2009 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(290.5840) Scattering : Scattering, molecules

ToC Category:
Atmospheric and Oceanic Optics

Original Manuscript: February 17, 2009
Revised Manuscript: March 16, 2009
Manuscript Accepted: March 21, 2009
Published: March 25, 2009

Xiaodong Zhang, Lianbo Hu, and Ming-Xia He, "Scattering by pure seawater: Effect of salinity," Opt. Express 17, 5698-5710 (2009)

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