Summary of 2014 JCOMM pilot inter-comparison project for seawater salinity measurements SCOPUS KCI

Title
Summary of 2014 JCOMM pilot inter-comparison project for seawater salinity measurements
Author(s)
Lee, J.-H.; Kim, E.-S.; Lee, Y.-K.
KIOST Author(s)
Lee, Junghan(이정한)
Publication Year
2016
Abstract
The inter-comparison project for seawater salinity measurements, in which 25 laboratories from 16 countries took part, was conducted by JCOMM (Joint WMO/IOC Technical Commission for Oceanography and Marine Meteorology) for the first time in 2014. Two seawater samples of different salinity values ranging from 30−35 and 20−25 for Sample A and Sample B respectively and which had sufficient homogeneity and stability were distributed to all participants. Participants measured the salinity in their own laboratories at least 3 times and reported the results. Statistical treatments were applied to the results to assess discrepancies among laboratories. 20 out of the 25 laboratories used laboratory salinometers and statistics for this group were denoted as belonging to group α; while 5 out of the 25 laboratories used hand-held measuring instruments and statistics for this group were denoted as belonging to group β. Bias described as discrepancy among laboratories in group α was within ± 0.001 and expanded uncertainty (k = 2) was in the vicinity of 0.002. The bias and the uncertainty of Korea Institute of Ocean Science and Technology (KIOST), in group α, were 0.000 and 0.002, respectively. The biases of group β were greater than group α because of constraints related to instrument accuracy. Biases from 3 laboratories in group β exceed the accuracy specification of the corresponding instruments. Considering that the uncertainty of Standard Seawater (SSW) is of the order 0.001 to 0.002, the inter-comparison results show that 16 laboratories among the 25 laboratories made high quality measurements, largely indistinguishable from one another. © 2016, Korea Ocean Research and Development Institute. All rights reserved.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2297
DOI
10.4217/OPR.2016.38.3.247
Bibliographic Citation
Ocean and Polar Research, v.38, no.3, pp.247 - 257, 2016
Publisher
Korea Ocean Research and Development Institute
Subject
comparative study; salinity; seawater; uncertainty analysis
Keywords
Inter-comparison; JCOMM; Salinity; Seawater; Uncertainty
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

Unmanned system,Marine security,무인체계,해양방위

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