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CODE
Cartesian coordinates Ocean model with three-Dimensional adaptive
mesh refinement and primitive Equations
In order to gain deeper insights into the role of
physical processes in determining the variability of the Icelandic marine eco-system
MARICE is running the numerical ocean model CODE (Logemann and Harms, 2006; Logemann 2007). CODE is a three-dimensional, primitive
equations, z-level, sea-ice/ocean model which uses the technique of
adaptive mesh refinement. It was recently developed at the universities of
Hamburg and Iceland.
RUN_02 (1991-2006) including daily runoff data and CTD data
assimilation
See animations of RUN_01 (1948-2008) here:
temperature, depth 15 m, year 1963
salinity, depth 15 m, year 1963
velocity, depth 15 m, year 1963
velocity, depth 15 m, 15.07.1963, (24 h
with high temporal resolution)
velocity, Faxaflói, depth 15 m,
15.07.1963, (high temporal and spatial resolution)
sea surface elevation, 15.07.1963, (24 h
with tidal waves)
See further output (RUN_01, monthly means of
various parameters) here.
Model description
Experiment
RUN_01
The hydrodynamics of Icelandic waters are simulated on a
three-dimensional computational mesh which is based on the GEBCO 2003
topography (BODC 2003) and represents the
whole North Atlantic and Arctic Ocean. The horizontal mesh resolution
varies between 128 km (Arctic, tropics, subtropics) and 1 km (Icelandic
waters), vertically between 160 m (deep sea) and 2.5 m (near surface).
Monthly climatologic ocean temperature and salinity fields given by the PHC
3.0 data set (Steele et al. 2001) are used
for initialisation and restoring (365 days Newtonian). Atmospheric forcing
(6 hourly fields of wind stress, air temperature, air pressure, humidity,
cloud cover and precipitation) is
provided by the NCEP/NCAR re-analysis_1 data set (Kalnay et al. 1996). Model-based estimates of the monthly
mean freshwater runoff of 58 Icelandic rivers (Arni Snorrason, Orkustofnun,
Iceland) are implemented. Tides are included using the functions of tidal
potential given by Apel (1987). After a spin-up period
of 15 years (repeated forcing with 1948 atmosphere data) the model run
covering the period 1948 to 2008 is started.
Model layout
Simulation
Experiment
RUN_02
The simulation covers the period July 1991 to June 2006. Regarding
RUN_01 there are two major differences: a) Daily values of the model-based
runoff of 58 Icelandic rivers are used, and b) a CTD data assimilation
procedure is implemented (CODE version 9.221) which uses all available CTD
profiles from the 1991-2006 period with positions between 60°N and 70°N,
and between 30°W and 5°W. The comparison with the observationally based fields compiled by the Marine
Research Institute, Reykjavik shows a strongly improved accordance of the
ocean model with observations.
Monthly values of temperature, salinity
and flow at 50 m depth.
Please send questions or comments to Kai Logemann (kai@hi.is)
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