Temperature and salinity correction coefficients for light absorption by water in the visible to infrared spectral region

Rüdiger Röttgers, David McKee, Christian Utschig

Research output: Contribution to journalArticle

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110 Downloads (Pure)

Abstract

The light absorption coefficient of water is dependent on temperature and concentration of ions, i.e. the salinity in seawater. Accurate knowledge of the water absorption coefficient, a, and/or its temperature and salinity correction coefficients, T and S, respectively, is essential for a wide range of optical applications. Values are available from published data only at specific narrow wavelength ranges or at single wavelengths in the visible and infrared regions. T and S were therefore spectrophotometrically measured throughout the visible, near, and short wavelength infrared spectral region (400 to ∼2700 nm). Additionally, they were derived from more precise measurements with a point-source integrating-cavity absorption meter (PSICAM) for 400 to 700 nm. When combined with earlier measurements from the literature in the range of 2600 - 14000 nm (wavenumber: 3800 - 700 cm-1), the coefficients are provided for 400 to 14000 nm (wavenumber: 25000 to 700 cm-1).

Original languageEnglish
Pages (from-to)25093-25108
Number of pages16
JournalOptics Express
Volume22
Issue number21
Early online date7 Oct 2014
DOIs
Publication statusPublished - 20 Oct 2014

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salinity
electromagnetic absorption
absorptivity
coefficients
wavelengths
water
point sources
temperature
cavities
ions

Keywords

  • water light absorption
  • light absorption
  • seawater salinity

Cite this

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Temperature and salinity correction coefficients for light absorption by water in the visible to infrared spectral region. / Röttgers, Rüdiger; McKee, David; Utschig, Christian.

In: Optics Express, Vol. 22, No. 21, 20.10.2014, p. 25093-25108.

Research output: Contribution to journalArticle

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