Accuracy limitations on Brillouin lidar measurements of temperature and sound speed in the ocean |
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Authors: | Fry E S Emery Y Quan X Katz J W |
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Affiliation: | Department of Physics, Texas A&M University, College Station, Texas 77843, USA. |
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Abstract: | There are five mutually dependent variables relevant to Brillouin lidar measurements of temperature and sound speed in the ocean; they are (1) the Brillouin shift, (2) the sound speed, (3) the index of refraction, (4) the temperature, and (5) the salinity. We use three well-known relations to analyze rigorously the interdependence of these five variables. Clearly, a Brillouin shift measurement does not provide a stand-alone determination of temperature or sound speed; one more variable or one more relation must be known. The use of mean values of salinity that have been obtained by an analysis of a large set of historical in situ data is considered for this additional relation. |
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