MERCATOR OCEAN JOURNA,: 
SEPTEMBER 2021 
ıgur, 1: Domain of the Arctic wave model. Shading colours are significant wave height Hs in meters. In the rectangle winds hindcast come 
rom the Harmonv-Arome model with 2.5 km resolution 
1.2 Ocean physics 
High-frequency signals (tides and storm surges) were 
introduced in March 2020, with a pan-Arectic 3 km 
zonfiguration of the 3-dimensional HYCOM-CICE model. 
At lateral boundaries - which are close to the wave model 
boundaries shown in Figure 1 - Global-HR MFC forecasts 
are combined with tidal heights and currents computed 
from the FES2014 tidal database, including 34 tidal 
constituents 
The model is intended to become the main workhorse 
for ocean physical and biogeochemical forecasts. It has 
therefore been set up with 50 hybrid z-isopycnic layers. 
Hence, in addition to surface tide forecasts, the model is 
zapable of internal tides prediction. 
As for the wave model , the resolution of 3 km is also 
adequate for the Norwegian national mandate and has 
replaced a pre-existing national forecast system. |It 
provides boundary conditions to coastal models around 
mainland Norway and Svalbard.