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Temperature‐dependent absorption of water in the red and near‐infrared portions of the spectrum
Author(s) -
W. S. PEGAU,
J. R. V. ZANEVELD
Publication year - 1993
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1993.38.1.0188
Subject(s) - attenuation coefficient , absorption (acoustics) , salinity , infrared , harmonics , analytical chemistry (journal) , absorption of water , absorption spectroscopy , infrared spectroscopy , temperature salinity diagrams , materials science , chemistry , optics , physics , environmental chemistry , geology , oceanography , organic chemistry , quantum mechanics , voltage , composite material
We looked at the influence of temperature and salinity on the absorption coefficient of water with emphasis on the red and near‐IR portions of the spectrum. The absorption coefficient of pure water was found to have a strong dependence on temperature and little dependence on salinity near the harmonics of the O−H bond‐stretching frequency. We found an increase in the absorption coefficient of 0.009 m −1 °C −1 at 750 nm and 0.0015 m −1 °C −1 at 600 nm.