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- Title
Assessment of Tide Gauge Biases and Precision by the Combination of Multiple Collocated Time Series.
- Authors
Gobron, Kevin; de Viron, Olivier; Wöppelmann, Guy; Poirier, Étienne; Ballu, Valérie; Van Camp, Michel
- Abstract
This study proposes a method for the cross calibration of tide gauges. Based on the combination of at least three collocated sea level time series, it takes advantage of the least squares variance component estimation (LS-VCE) method to assess both sea level biases and uncertainties in real conditions. The method was applied to a multi-instrument experiment carried out on Aix Island, France, in 2016. Six tide gauges were deployed to carry out simultaneous sea level recordings for 11 h. The best results were obtained with an electrical contact probe, which reaches a 3-mm uncertainty. The method allows us to assess both the biases and the precision—that is, the full accuracy—for each instrument. The results obtained with the proposed combination method have been compared to that of a buddy-checking method. It showed that the combination of all the time series also provides more precise bias estimates.
- Subjects
FRANCE; TIME series analysis; STATISTICAL accuracy; LEAST squares; SEA level; TIDES
- Publication
Journal of Atmospheric & Oceanic Technology, 2019, Vol 36, Issue 10, p1983
- ISSN
0739-0572
- Publication type
Article
- DOI
10.1175/JTECH-D-18-0235.1