A new tide model for the Mediterranean Sea based on altimetry and tide gauge assimilation Department of Geodesy and Surveying, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
20 Jun 2011
Received: 07 Sep 2010 – Published in Ocean Sci. Discuss.: 30 Sep 2010Abstract. The tides for the Mediterranean Sea are described through a high resolution
model (MEDI10) developed by assimilation of tide-gauge data and T/P data into
a barotropic ocean tide model. Tidal parameters from 56 coastal tide-gauge
stations around the Mediterranean for eight principal constituents: M2, S2,
N2, K2, K1, O1, P1 and Q1 and from 20 stations for M2, S2, K1, O1 are
included in the model. TOPEX/Poseidon data with all corrections applied
except for the ocean tides and bathymetry from TOPO 13.1 were used for
development of the model. Numerical experiments were carried out for the
estimation of the friction velocity and of the decorrelation length scale.
The experiments related to the friction velocity showed that the use of
spatially varying friction velocity, estimated as a function of position in
the model domain, gives better results than a constant value. The experiments
related to the estimation of the decorrelation length suggest that the
results are not sensitive for lengths close to ten times the length of the
grid cell. The assessment of the model is based on ten tide-gauge
observations that are not used for the assimilation. Comparisons were carried
out with contemporary published global or regional models. The final solution
is computed using 76 selected coastal tide-gauge stations. The comparison
between the observed and the model constituents results in a Root Sum of
Squares (RSS) equal to 1.3 cm.
Revised: 06 Jun 2011 – Accepted: 10 Jun 2011 – Published: 20 Jun 2011
Citation: Arabelos, D. N., Papazachariou, D. Z., Contadakis, M. E., and Spatalas, S. D.: A new tide model for the Mediterranean Sea based on altimetry and tide gauge assimilation, Ocean Sci., 7, 429-444, doi:10.5194/os-7-429-2011, 2011.