Start-up transient of XBT measurement

Shoichi Kizu, Kimio Hanawa

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20 Citations (Scopus)


The start-up transient of XBT measurements is statistically investigated for five types of recorder system: Z-60-16 II and III by Murayama Electric Co., Ltd., and MK-130 by Tsurumi Seiki Co., Ltd., which are commonly used in Japan, and Sippican MK-9 and MK-12, which are popular in the United States and other countries. The UNESCO recommendation to exclude XBT-measured temperatures in the top 3.7 m layer from the bathythermograph report is justified within a nominal precision of 0.2°C for Tsurumi Seiki T-7 probes. However, it is shown that the depth where the transient ceases differs for different types of recorder. If we require a more strict accuracy constraint of 0.02°C, the estimated depth of the transient is 2 m for MK-130, MK-9 and MK-12, 3 m for Z-60-16 III and 10 m for Z-60-16 II.

Original languageEnglish
Pages (from-to)935-940
Number of pages6
JournalDeep-Sea Research Part I: Oceanographic Research Papers
Issue number5
Publication statusPublished - 2002


  • Expendable bathythermograph
  • Sea surface temperature
  • Start-up transient
  • Temperature data
  • Temperature measurement
  • VOS monitoring
  • XTB


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