68
BON
70N
1'109
BON
70N
t f
~ii
" "
.,.,
NN
~~
. H
C. Schafer-Neth . K. Stattegger
Fig. 4 Modelled glacial
summer circulation at the
surface (left) and 350 m
depth (right). Only one vector in two is displayed for
darity. The currents, especially the flows into and out
of the GIN Seas, are quite
similar to modern conditions
for initialization and TIS restoring (Fig. 3) at the southwestern and northernmost boundaries of the meltwater and iceberg experiments.
For forcing the meltwater studies, we used the surface heat and freshwater
fluxes that were diagnosed from the LGM scenario and modified by additional
freshwater sources along the margins of the glacial ice sheets of Labrador,
Greenland, andlor Europe. Depending on the source area of the meltwater input, the ocean reacts in two distinctly different ways (Schafer-Neth and Stattegger 1997): If the meltwater originates from Greenland only, even intense
pulses of 1 Sv (= 10 6 tis), which are equivalent to a complete melting of the
present-day Greenland ice within about 200 years, cause no major change in