Geoscience Reference
In-Depth Information
a
b
c
Fig. 5.8
Temperature
a
, salinity
b
, and friction velocity
c
measured 7m below the ice during the
MIZEX 1984 project in the Greenland Sea marginal ice zone. Data have been averaged in 6-h
blocks (Adapted from McPhee 1994. Withpermission American Meteorological Society)
example,thatforthevaluescalculatedattime189.875,whentheheatfluxandmelt
rate were low enough to assume neutral stability, the ratio
P
s
/
ε
≈
67. If we as-
sumethatthesameratiowouldholdattime191.125iftherewerenobuoyancyflux,
the expected value for
P
s
would be as indicated by the asterisk in Fig. 5.11. If the
differencebetweentheobservedvalueandtheneutralestimaterepresentsthebuoy-
ancysink
1
.
w
b
≈−
Wkg
−
1
its value correspondsreasonablywell
to the estimated melt rate and buoyancy flux derived above, based on mixed layer
characteristics.
(
P
b
=
−
0
.
22
µ
)
