Journal cover Journal topic
Ocean Science An interactive open-access journal of the European Geosciences Union
Ocean Sci., 3, 59-75, 2007
https://doi.org/10.5194/os-3-59-2007
© Author(s) 2007. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
 
08 Feb 2007
Factors affecting the quality of XBT data – results of analyses on profiles from the Western Mediterranean Sea
F. Reseghetti1, M. Borghini2, and G. M. R. Manzella3 1ENEA-ACS-CLIM-MED, Forte S. Teresa – Pozzuolo di Lerici, 19032 Lerici (Sp), Italia
2CNR-ISMAR, Sez. Oceanografia Fisica, Forte S. Teresa – Pozzuolo di Lerici, 19032 Lerici (Sp), Italia
3ENEA-ACS, Forte S. Teresa – Pozzuolo di Lerici, 19032 Lerici (Sp), Italia
Abstract. EXpendable BathyThermograph (XBT) temperature profiles collected in the framework of the Mediterranean Forecasting System – Toward Environmental Prediction (MFS-TEP) project have been compared with CTD measurements. New procedures for the quality control of recorded values have been developed and checked. Some sources of possible uncertainties and errors, such as the response time of the apparatus (XBT probe, thermistor and readout chain), or the influence of initial conditions are also analysed. To deal with the high homogeneity of Mediterranean waters, a new technique to compute the fall rate coefficients, that give a better reproduction of the depth of thermal structures, has been proposed, and new customized coefficients have been calculated. After the application of a temperature correction, the overall uncertainties in depth and in temperature measurements have been estimated.

Citation: Reseghetti, F., Borghini, M., and Manzella, G. M. R.: Factors affecting the quality of XBT data – results of analyses on profiles from the Western Mediterranean Sea, Ocean Sci., 3, 59-75, https://doi.org/10.5194/os-3-59-2007, 2007.
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