RESTRICTED only accessable in ZMAW net or via CliSAP login What does that mean?
Data access via file system: /data/icdc/ocean/xbt
Expendable bathyhermograph (XBT) measures temperature down to the depth of about 800 m from a moving ship. Since the late 1960s XBTs contributed the majority of the subsurface temperature measurements in the ocean. However the XBT sample depth is not measured but calculated from the estimated fall-rate. The uncertainties in the fall-rate and the malfunctioning of the acquisition system cause XBT temperatures to be biased. This bias was shown to be comparable in magnitude with the typical decadal-scale temperature variability , so that neglecting this bias can seriously distort our estimates of global ocean climate change. Using original XBT data from the World ocean database WOD09 (Boyer et al., 2009) we provide a data product which includes depth- and temperature-corrected XBT profiles. The correction method is based on the recent study by Gouretski and Reseghetti (2010).
Coverage, temporal and spatial resolution
Period and temporal resolution:
Coverage and spatial resolution:
See Gouretski and Reseghetti, 2010.
Name: Viktor Gouretski
Institute: CliSAP / KlimaCampus / ICDC
email: viktor.gouretski@ zmaw.de
Gouretski, V. and F. Reseghetti (2010). On depth and temperature biases in bathythermograph data: development of a new correction scheme based on analysis of a global database. Deep Sea Research, I, 57, 812-833.
T. P. Boyer, J. I. Antonov, O. K. Baranova, H. E. Garcia, D. R. Johnson, R. A. Locarnini, A. V. Mishonov, T. D. O’Brien, D. Seidov, I. V. Smolyar, M. M. Zweng, 2009: World Ocean Database 2009, Chapter 1: Introduction, NOAA Atlas NESDIS 66, Ed. S. Levitus, U.S. Gov. Printing Office, Wash., D.C., 216 pp., DVD.
Contact Viktor Gouretski