37

Cireculation Model

vr

Fundamental equations

Numerical methode

Model region

Grid resolution

Horizontal grid
distance
Lower limit
of the layers

Period of simulation

Time step

Forcing

Qut put

FP?

"

Primitive shallow
water equations

semi-implicit finite
difference method

Implicit: vertical
nomentum exchange

North

Sag

48° N - 59° 30' N
WW 16°E

3-dimensional
10 lavyers

circa 20 km

10, 20, 30, 60, 100,
150, 200, 250, 300,
and 500 m

Stationary climatological
 mean situation

3 minutes
Climatological
annual mean of
the wind and climatological
 mean density
 in spring

mean tidal period
resolved in 60 time
Steps

EM“

NR. ZEN. _ WET. RER ÄMTERN EEE ln A A BE Üe

Primitive shallow
water equations

gemi-implicit finite
difference method

implicit: vertical
momentum exchange,
gravitational waves

Northwest European
Shelf Seas 1ncluding
 the North Sea

48° N — 64° N,
15° W-14° ©

3-dimensional
12 layers in summer
7 layers in winter

eirca 20 km

10, 20, 30, 60, 100,
150, 200, 250, 350,
600, 1000, 3500 m in
summer
20, 40, 100, 300,
600, 1000, 3500 m
In winter
January 1969 to
December 1982

40 minutes

6-hourly values of
air pressure and
wind stress over the
simulation period.
Climatological mean
density in summer
cesp. winter

daily mean values
and variances of the
currents over the
simulation period of
14 years.