Geoscience Reference
In-Depth Information
Chlorophyll (mg m
-3
)
Chlorophyll (mg m
-3
)
Figure 7.7
Examples of vertical
profiles of temperature (solid
line), chlorophyll (dashed line),
and nitrate (dots in (a)-(c),
bold line in (d). (a) The western
English Channel (Sharples
shelf of New Zealand (Sharples
flank of Georges Bank. (Data
courtesy of David Townsend,
University of Maine, and the
US GLOBEC Program.)
(d) Monterey Bay, California.
Adapted from Steinbuck et al.,
Steinbuck, Stanford
University, and
co-workers with permission
from ASLO.
(a)
(b)
0
12
3
4
5
0
1
2
Temperature(
C)
Temperature(
C)
13
16
19
9 2 5 8 1
0
0
-40
-40
-80
-80
-120
-120
-160
0
2
4
6
024
6
8
Nitrate (mmol m
-3
)
Nitrate (mmol m
-3
)
Chlorophyll (mg m
-3
)
Chlorophyll (mg m
-3
)
(c)
(d)
0
1
2
0 0 0 0
Temperature(
C)
Temperature(
C)
57 9 1 3
13
14
15
16
0
0
-40
-10
-80
-20
0
2
4
6
8
10
0
2
4
6
8
Nitrate (mmol m
-3
)
Nitrate (mmol m
-3
)
to drive photosynthesis. Moreover, as mixing drives nutrients into the layer, it will
also be removing phytoplankton from the layer; growth within the layer needs to be
able to offset this export to deeper water. A numerical model of phytoplankton growth
within a framework similar to the TC model described earlier in
Section 7.2.1
does
show the development of a post-spring bloom SCM made up of neutrally buoyant
phytoplankton. However, the SCM only develops if there is some 'background'
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