Clima en España: Pasado, presente y futuro Madrid, Spain, 11 – 13 February. Long-term sea level variability: what observations tell us F. M. Calafat 1 , M. Marcos 1 , M. N. Tsimplis 2 , D. Gomis 1 , A. Pascual 1 , S. Montserrat 1. 1 IMEDEA (UIB - CSIC), Mallorca, SPAIN.
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Clima en España: Pasado, presente y futuroMadrid, Spain, 11 – 13 February
Long-term sea level variability: what observations tell usF. M. Calafat 1, M. Marcos 1, M. N. Tsimplis 2, D. Gomis 1, A. Pascual1, S. Montserrat 1
1 IMEDEA (UIB - CSIC), Mallorca, SPAIN.
2 National Oceanography Centre, Southampton, UK.
Variations of the seasonal cycle in the Mediterranean
The mean annual and semi-annual cycle have been estimated for each station by a least square fit of the equation:
Mean seasonal sea level cycle: 1962-1989
Temporal variability: observed sea level annual cycle
Temporal variability: Atmospherically-induced annual cycle
Temporal variability: residual sea level annual cycle
Sea level trends
Tide gauge records:
partial spatial coverage and …
they do not measure absolute sea level, but sea level relative to land marks… and land is not static
• Model corrections (GIA)
- The post glacial rebound have been corrected by means of the GIA model ICE-5G (VM2, Peltier, 2004)
Sea level trends in Southern Europe for the period 1960-2000
short time coverage (from 1993)
F.M. Calafat and D. Gomis, 2009 in GPC
: Spatial EOFs from altimetry data
: tide gauge data
Reconstruction of Mediterranean Sea level fields for the period 1945-2000
Distribution of sea level trends for the period 1993-2000
Comparison between the reconstruction and tide gauge observations
Distribution of sea level trends for the period 1945-2000
Mean Sea level for the period 1945-2000