The Role of GNSS Vertical Velocities to Correct Estimates of Sea Level Rise from Tide Gauge Measurements in Greece

Bitharis, Stylianos; Ampatzidis, Dimitrios; Pikridas, Christos; Fotiou, A.; Rossikopoulos, Dimitrios; Schuh, Harald

doi:10.1080/01490419.2017.1322646

Cited by 17 publications

(12 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A positive vertical movement of the crust on which a tide gauge is founded, decreases the readouts of the sea level, whereas a negative movement increases them. These considerations are consistent with Wöppelmann and Marcos (2016), Grgić et al (2017) and Bitharis et al (2017).…”

Section: Introductionsupporting

confidence: 84%

Modern vertical crustal movements of the southern Baltic coast from tide gauge, satellite altimetry and GNSS observations

Kowalczyk¹

2019

Acta Geodynamica Et Geomaterialia

View full text Add to dashboard Cite

In this study, the vertical crustal movements of the southern Baltic coast were determined based on two independent methods: tide gauge and GNSS observations. The mean sea level change trends were determined from five tide gauge observations and satellite altimetry data along the Polish coastal zone. The vertical crustal movements at nearby GNSS stations were also determined. We used the tide gauge water level data from the Permanent Service for Mean Sea Level (PSMSL) and from the Institute of Meteorology and Water Management National Research Institute, Poland (1951-2017 and 1993-2017) as well as sea level anomalies obtained from the Copernicus Marine and Environment Monitoring Service (CMEMS) (1993-2017). The time series for GNSS stations eveloped with the PPP technique obtained from Nevada Geodetic Laboratory (NGL) and last-squares approach were used for the analysis. The results provide a view of the absolute vertical crustal movements of the Polish coast. The absolute vertical crustal movements, calculated from tide gauge data and satellite altimetry for the time period between 1951-2017-from +2.20 mm/yr ±0.42 mm/yr to +2.68 mm/yr ±0.31 mm/yr. A comparison was made, and it showed that the absolute movements determined from two data sets were different. This may be a consequence of several factors: short and incomplete time series, other unidentified movements of a GNSS station, a tide gauge of own movements, human activity, geological and hydrological factors, the method of the time series elaboration and of the data used to work out the vertical crustal movements. It is thought that the results are very significant despite the existing differences in the absolute crustal movements, because the sea level is a unique index in studies of climate impact on all changes on the Earth and crustal movements are closely linked to it.

show abstract

Section: Introductionsupporting

confidence: 84%

Modern vertical crustal movements of the southern Baltic coast from tide gauge, satellite altimetry and GNSS observations

Kowalczyk¹

2019

Acta Geodynamica Et Geomaterialia

View full text Add to dashboard Cite

show abstract

“…The calculated vertical movements of the Earth's crust are verified against the values determined in neighbouring points with the use of other techniques, and the values are varied [23,24]. The basic prerequisite is the closest proximity of available TG [25,26]. The relative movements v R between a GNSS station and a TG should be taken into account [27].…”

Section: Methodsmentioning

confidence: 99%

An Analysis of Vertical Crustal Movements along the European Coast from Satellite Altimetry, Tide Gauge, GNSS and Radar Interferometry

et al. 2021

View full text Add to dashboard Cite

The main aim of the article was to analyse the actual accuracy of determining the vertical movements of the Earth’s crust (VMEC) based on time series made of four measurement techniques: satellite altimetry (SA), tide gauges (TG), fixed GNSS stations and radar interferometry. A relatively new issue is the use of the persistent scatterer InSAR (PSInSAR) time series to determine VMEC. To compare the PSInSAR results with GNSS, an innovative procedure was developed: the workflow of determining the value of VMEC velocities in GNSS stations based on InSAR data. In our article, we have compiled 110 interferograms for ascending satellites and 111 interferograms for descending satellites along the European coast for each of the selected 27 GNSS stations, which is over 5000 interferograms. This allowed us to create time series of unprecedented time, very similar to the time resolution of time series from GNSS stations. As a result, we found that the obtained accuracies of the VMEC determined from the PSInSAR are similar to those obtained from the GNSS time series. We have shown that the VMEC around GNSS stations determined by other techniques are not the same.

show abstract

“…Data from four stations (Piraeus, Katakolo, Siros and Kalamata) are visualised on-line through the HNHS web page (https://www.hnhs.gr/en/online-2/tide-graphs). Data from all tidal gauges covering the 1969-2020 period are also transferred to the Permanent Service for Mean Sea level (PSMSL) (https://www.psmsl.org/), supported by the International Oceanographic Commission (Bitharis et al, 2017). Sea level data from these four digital stations are also provided and visualized in real-time mode to the IOC -SLSMF (http://www.ioc-sealevelmonitoring.org/).…”

Section: Greek Tide Gauge Network Operated By the Hellenic Navy Hydrographic Servicementioning

confidence: 99%

Coastal Sea Level Monitoring in the Mediterranean and Black Seas

Gómez¹,

Vilibić²,

Šepić

et al. 2022

Preprint

View full text Add to dashboard Cite

Abstract. Spanning over a century, a traditional way to monitor sea level variability by tide gauges is – in combination with modern observational techniques like satellite altimetry – an inevitable ingredient in sea level studies over the climate scales and in coastal seas. The development of the instrumentation, remote data acquisition, processing and archiving in last decades allowed for extending the applications towards a variety of users and coastal hazard managers. The Mediterranean and Black seas are an example for such a transition – while having a long tradition for sea level observations with several records spanning over a century, the number of modern tide gauge stations are growing rapidly, with data available both in real-time and as a research product at different time resolutions. As no comprehensive survey of the tide gauge networks has been carried out recently in these basins, the aim of this paper is to map the existing coastal sea level monitoring infrastructures and the respective data availability. The survey encompasses description of major monitoring networks in the Mediterranean and Black seas and their characteristics, including the type of sea level sensors, measuring resolutions, data availability and existence of ancillary measurements, altogether collecting information about 236 presently operational tide gauge stations. The availability of the Mediterranean and Black seas sea level data in the global and European sea level repositories has been also screened and classified following their sampling interval and level of quality-check, pointing to the necessity of harmonization of the data available with different metadata and series at different repositories. Finally, an assessment of the networks’ capabilities for their usage in different sea level applications has been done, with recommendations that might mitigate the bottlenecks and assure further development of the networks in a coordinated way, being that more necessary in the era of the human-induced climate changes and the sea level rise.

show abstract

The Role of GNSS Vertical Velocities to Correct Estimates of Sea Level Rise from Tide Gauge Measurements in Greece

Cited by 17 publications

References 34 publications

Modern vertical crustal movements of the southern Baltic coast from tide gauge, satellite altimetry and GNSS observations

Modern vertical crustal movements of the southern Baltic coast from tide gauge, satellite altimetry and GNSS observations

An Analysis of Vertical Crustal Movements along the European Coast from Satellite Altimetry, Tide Gauge, GNSS and Radar Interferometry

Coastal Sea Level Monitoring in the Mediterranean and Black Seas

Contact Info

Product

Resources

About