LTC Modeling Examples - Air-Ice-Ocean Interaction - page 152

SHEBA Profiler Upper Ocean Salinity

0 32.5

a

32

- 20

31.5

31

- 40

30.5

30

- 60

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Day of 1998

Model Upper Ocean Salinity

32

Run Sep 14A

- 10

b

31.5

- 20

31

- 30

- 40

30.5

- 50

30

- 60

258 259 260 261 262 263 264 265

Day of 1998

Fig. 8.10 Contour plots of salinity in the upper ocean from SHEBA profiler a and wind-driven
model Sep 14A b (see also Colorplate on p. 211)

Average δ T, 3−15 m

0.03

Model
Profiler

0.025

0.02

0.015

Run Sep 14B

0.01

257 258 259 260 261 262 263 264 265

Day of 1998

Fig. 8.11 Comparison of modeled and observed dT for model Sep 14B with a small negative
salinitysource term as an approximation to advective flux

relatively small horizontal gradients encountered as the ice drifts will swamp the
signal from local vertical exchanges. On the other hand, vertical fluxes are often
relatively immune to horizontal property gradients except in front-like conditions,
henceingeneralprovideasuperiorassessmentoftheparticularmixingschemeused
inthemodel.