title: Accuracy limitations on Brillouin lidar measurements of temperature and sound speed in the ocean.
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.
authors.affiliation: Department of Physics, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: E S
authors.initials: ES
authors.lastname: Fry
authors.forename: Y
authors.initials: Y
authors.lastname: Emery
authors.forename: X
authors.initials: X
authors.lastname: Quan
authors.forename: J W
authors.initials: JW
authors.lastname: Katz