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Assessment of a vertical high-resolution distributed-temperaturesensingsystem in a shallow thermohaline environment

Su´arez, F and Aravena, J. E and Hausner, M. B and Childress, A. E and Tyler, S. W (2011) Assessment of a vertical high-resolution distributed-temperaturesensingsystem in a shallow thermohaline environment. Hydrology and Earth System Sciences.

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    In shallow thermohaline-driven lakes it is important to measure temperature on fine spatial and temporal scales to detect stratification or different hydrodynamic regimes. Raman spectra distributed temperature sensing (DTS) is an approach available to provide high spatial and temporal temperature resolution. A vertical high-resolution DTS system was constructed to overcome the problems of typical methods used in the past, i.e., without disturbing the water column, and with resistance to corrosive environments. This paper describes a method to quantitatively assess accuracy, precision and other limitations of DTS systems to fully utilize the capacity of this technology, with a focus on vertical high-resolution to measure temperatures in shallow thermohaline environments. It also presents a new method to manually calibrate temperatures along the optical fiber achieving significant improved resolution. The vertical highresolution DTS system is used to monitor the thermal behavior of a salt-gradient solar pond, which is an engineered shallow thermohaline system that allows collection and storage of solar energy for a long period of time. The vertical high-resolution DTS system monitors the temperature profile each 1.1 cm vertically and in time averages as small as 10 s. Temperature resolution as low as 0.035 �C is obtained when the data are collected at 5-min intervals.

    Type du document: Article
    Sujets: Articles > Geosciences
    Divisions: UNSPECIFIED
    Déposé par: Editeur UVT
    Date de dépôt: 02 Apr 2011 11:25
    Dernière modification: 02 Apr 2011 11:25

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