Variação do nível do mar na Península Ibérica vs. problemática da erosão costeira

IBERIAN PENINSULA


11 Outubro 2009
Glaciated areas versus Forebulge areas
18.000 years ago
Vertical velocities vs latitude: and around Iberia

GPS Cascais: vertical velocity
GPS Lagos: vertical velocity
To understand the influence of earth movements: GPS stations
It was used an uplift of 0,5mm/yr.
Corrections…
Uplift
Uplift… and subsidence
RSL trends (PSMSL)
Relative sea level trends
Bhs horizon of an holocenic pdzolic soil: around msl near Esmoriz lagoon

The marine terraces at the north of Espinho seems to be dipping to the south
Geologic situation
At the South of Espinho there is a strong coastal erosion. The sea is eroding the beaches and
the aeolian sands acumulated probably during the little ice age
7 Agosto 2003
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

Absolute sea level trends

Secular variation of sea level at Cascais
Carlos Antunes site (FCUL)
With the data I got one can make this kind of graphs: 7/07/2015 till 17/09/2015
Relative sea level
Is sea level rise accelerating?
Many people says so.

Is it true?

19 February 2011
Coastal erosion is a real problem in Portugal: sea level changes?
"Accelerated sea level rise"?
Francelos: 31 dec 1998
LONDON CONFERENCE ONLINE
https://geoethic.com/london-conference-2016/
http://www.deluxetech.co.uk/climate-change-conference-both-days/
http://bambuser.com/v/6450280



Sea level data for the Iberian Peninsula
Variação do nível do mar na Península Ibérica vs. problemática da erosão costeira
Relative sea level trends in the Iberian Peninsula (2002 data)

Many PSMSL stations are not updated

Iberia: trends vs. length of series: recent data

Portuguese coast
DATA AT CASCAIS IS NOT ACTUALIZED
Sagres Station: data and graphs (every minute)
Sea level station monitoring facility
Cascais: PSMSL data
Iberia series >18,6yr
Station
Trend
Iberia>18yrs
1,92
Iberia>60yrs
1,63
Atlantic>18yrs
1,89
Iberia, in short series: great irregularities in the trends


2
1
3
Podzolic soil seem to be uplifted to the south
Espinho

Neotectonic map of Portugal (Ribeiro & Cabral, 1989):
An active lineament strikes the coastline at the latitude of Espinho

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 stations (Iberia) with series >18,6 yr. long: 1,92
Most of them seem to be subsiding: absolute SL rise