371
32
31
I- 30
28 0
-2.5
> -3.5
CI)
-- 0'" -4
-4.5
Temperature gradient
a.
.......
"
e,
.
' . ....
'.
_.'::::;.,:.-- ...... :.....-._-;:::;;;-.... ....... -.500
1000
years
Flow rate
c.
\\ .
\ '.
\ '.
\\ '.
\". ..... , ........ -
-: .. _.:-a.. _ _ _ ,.".........
...... . ............ .
-5~------~~~----~
o
500
1000
years
8.5
6.5 0
1.5
o
o
o
,- 0.5
i<
:::J
C
b.
d.
Salinity gradient
500
1000
years
Spiciness gradient
-0.50~---~---~
500
1000
years
Figure 9: The nrst 1000 years of the time histories of 4 models after the low-latitude
sinking equilibrium is perturbed by 0.2 psu in the high-latitude box and -0.2 psu in
the low-latitude box. Solid: #1, nxed fluxesj dashed: #2, nxed temperaturesj dotted:
#3, radiative restoringj dash-dotted: #8, cubic atmospheric transports. (a) Temperature
gradient, (b) salinity gradient, (c) flow strength (and hence density gradient), (d) spiciness
gradient anomaly.