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| Titel |
Overlapping sea level time series measured using different technologies: an example from the REDMAR Spanish network |
| VerfasserIn |
B. Pérez, A. Payo, D. López, P. L. Woodworth, E. Alvarez Fanjul |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 14, no. 3 ; Nr. 14, no. 3 (2014-03-13), S.589-610 |
| Datensatznummer |
250118334
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| Publikation (Nr.) |
 copernicus.org/nhess-14-589-2014.pdf |
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| Zusammenfassung |
| This paper addresses the problems of overlapping sea level time series
measured using different technologies and sometimes from different locations
inside a harbour. The renovation of the Spanish REDMAR (RED de MAReógrafos) sea level network is
taken here as an example of the difficulties encountered: up to seventeen
old tide gauge stations have been replaced by radar tide gauges all around
the Spanish coast, in order to fulfil the new international requirements on
tsunami detection. Overlapping periods between old and new stations have
allowed the comparison of records in different frequency ranges and
the determination of the impact of this change of instrumentation on the
long-term sea level products such as tides, surges and mean sea levels. The
differences encountered are generally within the values expected, taking into
account the characteristics of the different sensors, the different sampling
strategies and sometimes the different locations inside the harbours.
However, our analysis has also revealed in some cases the presence of
significant scale errors that, overlapping with datum differences and
uncertainties, as well as with hardware problems in many new radar gauges,
may hinder the generation of coherent and continuous sea level time series.
Comparisons with nearby stations have been combined with comparisons with
altimetry time series close to each station in order to better determine the
sources of error and to guarantee the precise relationships between the sea
level time series from the old and the new tide gauges. |
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