MEAN SEA LEVEL MONITORING
MSL monitoring over the last 15 years, with tide gauge data (Cascais) and satellite altimetry data (mainland Atlantic coast), with monthly updates.
Secular Variation of Mean Sea Level in Cascais
Monthly averages of tide gauge records from Cascais (1882-present), including data from the old analogue tide gauge (jan 1882 – oct 2003), data from the digital acoustic tide gauge (nov 2003 – jun 2019) and data from the digital radar tide gauge (jul 2019 – present). Data from the new digital tide gauges (in Cascais Marina), as of november 2003, are corrected for the vertical movement of the support structure, based on high-precision geometric leveling measurements
Reference in the National Vertical Datum (Cascais1938, relative to the average of the period 1882-1938).
Annual Variation of the Mean Sea Level in Cascais
Daily sea level averages series recorded on the Cascais tide gauge (jan 2000 – feb 2023), corrected for the average seasonal of the Atmospheric Pressure variation (inverse barometric effect) and the vertical velocity of the site (settling movement of the support structure at Cascais marina).
With reference to the National Vertical Datum (Cascais1938). The most recent uncorrected data (since 2007) can be downloaded from ftp://ftp.dgterritorio.pt/Maregrafos.
Analysis of Tide Maximums and Storm Surge in Cascais Analysis
Citations:
[2] Antunes C. (2019) Assessment of Sea Level Rise at West Coast of Portugal Mainland and Its Projection for the 21st Century. J. Mar. Sci. Eng. Int., 7(3), 61, doi.org/10.3390/jmse7030061
[1] Vieira R., Antunes C. e Taborda R. (2012) Caracterização da sobreelevação meteorológica em Cascais nos últimos 50 anos. Actas das 2.as Jornadas de Engenharia Hidrográfica, Instituto Hidrográfico, Lisbon, Portugal.
Mean Sea Level variation comparison
MSL rise series comparison, between the global and North Atlantic models from satellite altimetry and the Cascais tide gauge series (1993-2019).
MSL(2000) reference, located 13 cm above the National Vertical Datum "Cascais1938".
Global Mean Sea Level Variation (1880-2020)
Updated reconstruction of data from the worldwide tide gauge network between 1880-2019 from Church & White (2011) and satellite altimetry data from the Australian CSIRO center (1993-2020).
MSL(2000) reference, located 13 cm above the National Vertical Datum "Cascais1938".
Data source:
https://www.cmar.csiro.au/sealevel/sl_hist_few_hundred.html