Geoscience Reference
In-Depth Information
mooring to the next. Typical vertical profiles of density and nitrate concen-
tration between the moorings are:
Chl (mg m
-3
)
0
10
2
σ
t
(kg m
-3
)
25.4
25.8
26.2
26.6
0
-40
-80
-120
-160
0
2
468
Nitrate (mmol m
-3
)
Estimate the flux of nitrate (mmol m
2
d
1
) into the base of the subsurface
chlorophyll maximum driven by internal tidal mixing.
10.5. Assuming the bottom layer of the North Sea has a mean thickness of 50 metres,
and using
Fig. 10.24
, estimate the volume of the bottom layer of the seasonally
stratifying central and northern North Sea.
Thomas, et al.,
2004
observed that 13 mmol m
3
of DIC is stored in the bottom
water of the stratified North Sea as a result of surface layer primary productiv-
ity. Use the estimate of annual bottom layer exchange with the North Atlantic
in Huthnance, et al.,
2009
to calculate the potential export of DIC from the
North Sea to the North Atlantic.
Discuss why your answer differs from that estimated by Thomas and
co-workers.
Search WWH ::
Custom Search