1. Sea level data for the Iberian Peninsula

2. Coastal erosion is a real problem in Portugal: sea level changes
Coastal erosion is a real problem in Portugal: sea level changes? “Accelerated sea level rise”?
Francelos: 31 dec 1998

3. Tectonic framework: Recent mountains in the periphery of mini Iberian plate

4. Neogene compression

5. Earthquakes in iberia

6. PSMSL in 2002
Portuguese stations

7. Is sea level rise accelerating? Many people says so.
Is it true?

8. Many PSMSL stations are not updated

9. Iberia: trends vs. length of series
Portuguese coast

10. Iberia, in short series: great irregularities in the trends

11. Iberia series >18,6yr Station Trend Iberia>18yrs 1,92
1,63
Atlantic>18yrs
1,89

12. Cascais: PSMSL data

13. Sea leval station monitoring facility

14. Sagres Station: data and graphs (every minute)

15. DATA AT CASCAIS IS NOT ACTUALIZED

16. With the data I was able to get one can make this kind of graphs:

17. Carlos Antunes site (FCUL)

18. It was used an uplift of 0,5mm/yr

19. Secular variation of sea level at Cascais

20. To understand the influence of earth movements: GPS stations

21. GPS Cascais: vertical velocity

22. GPS Lagos: vertical velocity

23. RSL trends (PSMSL)

24. Vertical velocities vs latitude: and around Iberia

25. Absolute sea level trends

26. Conclusions 1:
Most of the places out of Scandinavia are subsiding. This augments RSL trends
The exception: recent mountain ranges in the limits of Iberia (Pyrenees and Baetics)
The “absolute sea level” changes (discounting on earth movements) are available only for 5 locations in Iberia
4 of them are under 1mm/yr of absolute (eustatic/steric) sea level rise

27. Going back to the beginning: which are the causes of coastal erosion?

28. The unfortunate “Titanic” case

29. Any interference on littoral drift has big consequences

30. Coastal evolution in the last 50 years: northern Portugal
Vcoastal

31. Aveiro lagoon (Centre Portugal)
Littoral drift

32. Sediments retention by dams: Northern Portugal

33. Conclusions 2:
Coastal erosion has very little to do with sea level change (10%?)
Anthropic interventions have a lot to do with it
RSL: average >18,6 yr: 1,92
Absolute SL rise <1mm/yr
Sea level rise as primary factor for coastal erosion Is simply FALSE

34. Thanks for your attention!