244
Salinity / Sigma-theta
34.5
34.6
34.7
34.8
34.9
35.0
0
I
I
I
I
I
1
500 -i
~
I
I
1
I
I
!
~
1000
l
~
SigmaSa li n ity
I
rheta
I
1500
L
Q)
I
L
::J
i
CIl
2000 ..j
r
CIl
Q)
I
L
CL
i
2500 J !
1
i
3000 ~
I
3500
Temperature
4000
1.0 1.5 2.0 2.5 3.0 3 .5 4.0 4.5 5.0
Potentia I Tempe r ature Coe)
Figure 26: Profiles of potential temperature (B), salinity (8) and 0"1.5 versus pressure at
fo ur stations in the mi ddle of the AR7/W line, Labrador Sea, in July 1990. From Lazier,
in press.
In fact, something similar may have happened previously. By using Ice
Patrol hydrography to extend t he OWS BRAVO record back beyond 1945,
Hallberg, Lazier and Rhines, pers. comm. have compiled a discontinuous
record of annual e - S characteristics for LSW back to 1928. Though
it occurred at a higher base-temperature and salinity t han today [t hese
were t he years when a considerable wave of warming and salinification was
Salinity / Sigma-theta
34.5
34.6
34.7
34.8
34.9
35.0
0
I
I
I
I
I
1
500 -i
~
I
I
1
I
I
!
~
1000
l
~
SigmaSa li n ity
I
rheta
I
1500
L
Q)
I
L
::J
i
CIl
2000 ..j
r
CIl
Q)
I
L
CL
i
2500 J !
1
i
3000 ~
I
3500
Temperature
4000
1.0 1.5 2.0 2.5 3.0 3 .5 4.0 4.5 5.0
Potentia I Tempe r ature Coe)
Figure 26: Profiles of potential temperature (B), salinity (8) and 0"1.5 versus pressure at
fo ur stations in the mi ddle of the AR7/W line, Labrador Sea, in July 1990. From Lazier,
in press.
In fact, something similar may have happened previously. By using Ice
Patrol hydrography to extend t he OWS BRAVO record back beyond 1945,
Hallberg, Lazier and Rhines, pers. comm. have compiled a discontinuous
record of annual e - S characteristics for LSW back to 1928. Though
it occurred at a higher base-temperature and salinity t han today [t hese
were t he years when a considerable wave of warming and salinification was