 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The
summer (Aug. 15) meridional
|
|
overturning
circulation is graphed for
|
|
|
six
HYCOM simulations as a function
|
|
of
latitude and density. The five
|
|
simulations
without relaxation BC’s
|
|
are
very similar to each other.
|
|
|
Relaxation
BC’s clearly enhance the
|
|
meridional
overturning circulation and
|
|
induces
a deep circulation cell
|
|
associated
with the northward flow
|
|
|
of
bottom water. A significant seasonal
|
cycle
exists at low latitudes, with a
|
|
reverse
circulation cell evident
|
|
south
of 10N in all simulations with no
|
|
|
relaxation
BC’s. This leads to
|
|
significant
upwelling at upper and
|
|
middle
depths near 10N. The tendency
|
|
for
flow reversal is evident in the BC
|
|
|
case,
but it does not overcome the
|
|
enhanced
overturning cell. The
|
|
upwelling
at 10N is confined to the
|
|
upper ocean.
|
|
