Empirical formula for the refractive index of freezing brine

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    The refractive index of freezing brine is important for example in order to estimate oceanic scattering as sea ice develops. Previously, no simple continuous expression was available for estimating the refractive index of brine at subzero temperatures. I show that extrapolation of the empirical formula for the refractive index of seawater by Quan and Fry [Appl. Opt. 34(18), 3477-3480 (1995)] provides a good fit to the refractive index of freezing brine for temperatures above -24 degrees celsius and salinities below 180 parts per thousand.
    Original languageEnglish
    JournalApplied Optics
    Issue number11
    Pages (from-to)2149-2153
    Publication statusPublished - 2009

    Bibliographical note

    This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-11-2149. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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