This is the slide version of the poster with the same title I presented at the European Geosciences Union in Vienna last month (EGU'07) under the Operational Oceanography session
4. Results
The application is run weekly and provides 5 day forecast for
the three-dimensional hydrodynamic circulation off the coast
of Portugal. Results since November 2006 are available at
http://data.mohid.com served by an Opendap server and a
Live Access Server (LAS).
The results shown are either instantaneous values, either a
statistical average performed over the available set of weekly
runs.
Instantaneous results seem to evidence that the finer-scale
model is more prone to generate internal waves.
To the left, the interpolated temperature fields of the Mercator
solution. To the right, the super-position of the temperature fields
of the C model over the P model. The temperature scale's interval
is [14.5 20.0] ÂșC at the surface (top) and [12.0 14.7] ÂșC at 250 m
(bottom). The graphical tool is Mohid GIS.
April 16th 2007 G. Riflet, EGU symposium Vienna 2007 4
5. Results
The Mediterranean Waters (MW) spreading pathway are
evidenced in currents at intermediate depth and with the
salinity distribution at 1000 m. The models averaged results
seem realistic when compared with observations reported in
the literature.
Color map and contours of salinity
distribution ensemble average at 1000
m depth ranging in
interval [35.6 36.2] showing the
spreading pathway of the MO off
western Iberia. Contour lines are
valued
[35.6; 35.78; 35.84; 35.9; 35.96;
36.02; 36.08; 36.14; 36.2]
Horizontal distribution of velocity
ensemble average at 2 m depth for the
top panel and 645 m
depth for the bottom panel. Tw o main
branches of the MW spreading
pathw ays are w ell pronounced in
the bottom panel. the polew ard slope
current branch, and the cyclonic
recirculation f low ing southw ard.
April 16th 2007 G. Riflet, EGU symposium Vienna 2007 5
6. Results
The Mediterranean outflow (MO) in the model shifts from a
bottom current to a buoyancy driven intermediate depth jet
current in the Gulf of Cadiz at about 8 ÂșW. This is a known
realistic scenario.
On the left, ensemble averages of meridional velocity
contours of 0.1 ms-1 apart and color maps in the interval [-.1
.1] ms-1 are shown. Positive velocities are equatorward and
negative velocities are poleward. On the right, ensemble
On the left panel, salinity contours of [35.5; 35.52; 35.83; 35.94; 36.05; averages of salinity contours of
36.16; 36.27; 36.38; 36.49; 36.6] and color maps in the interval [35.5 36.6].
[35.6; 35.66; 35.72; 35.78; 35.84; 35.90; 35.96; 36.02;
On the right panel, ensemble averages of zonal velocity contours of [-.15;
36.08; 36.14; 36.2] and color maps in the interval [35.6 36.2]
-.12; -.09; -.06; -.03; 0; .03; .06; .09;.12; .15] ms -1 and color maps in the
are shown. The plots are zonal sections of the Portuguese
interval [-.15 .15] ms -1. The plots are meridional sections in the Gulf of
coast at 40.95 ÂșN for the top panels; and 38.25ÂșN for the
Cadiz at longitude 7.83 ÂșW. The MO shifts from a bottom current to a
bottom panels. The cross sections are shown in the
buoyancy driven intermediate depth jet current. The cross sections are
bathymetries figure.
shown in the bathymetries figure.
April 16th 2007 G. Riflet, EGU symposium Vienna 2007 6
7. Results
Quality assessment can be performed with instantaneous results 4.5
4
agains tidal stations and remote-sensing SST imagery. 3.5
3
2.5
Water level (m)
2
1.5
1
0.5
0
09-02- 11-02- 13-02- 15-02- 17-02- 19-02- 21-02- 23-02- 25-02-
2007 2007 2007 2007 2007 2007 2007 2007 2007
12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00
Time
Sines tide gauge Operational model
Water level from from a tidal station in pink
located at 37Âș57â ÂșN and 8Âș55â ÂșW in Sines and
illustrated in the the bathymetries figure. Water
level from the pre-operational model in forecast
mode for the same location. The correlation is
0.99 + 5e-3 and the RMSE is 0.19 + 5e-3 m.
The Mercator solution sea surface temperature daily average on the September 9th 2006, at the left. A NOAA
sea surface temperature satellite image taken during the same day, at the middle. At the right, the Mohid
instantaneous solution taken the same day at 19h00 hours. The temperature scale is set to [17ÂșC 22ÂșC]. Note
that the color palettes diverge between the satellite images and the model's fields. The graphical tool used is
Mohid GIS.
April 16th 2007 G. Riflet, EGU symposium Vienna 2007 7