Pacific Coastal Biome
435
0.23
0.30
0.38
0.46
0.53
0.12
0.18
0.24
0.30
0.36
SeaWiFS (AUSE): September 1997 - January 2002
Surface Chl (mg m
-3
)
Pt (gC m
-2
d
-1
)
Pt d
-1
Chl m
-3
1998
1999
2000
2001
0
20
40
60
80
100
0
5
10
15
20
Climatology (years)
Depth (m)
Production at DCM (%)
Zm (sigma)
Zeu
Pt (at DCM)
Fig. 11.23 AUSE: seasonal cycles of monthly surface chlorophyll and depth-integrated autotrophic production
for the years 1997–2002 from SeaWiFS data together with characteristic seasonal cycles of mixed-layer depths
from Levitus climatological data and photic depths computed from characteristic irradiance and the archive
of chlorophyll profiles discussed in Chapter 1.
A moderate productivity-rate increase is initiated 30 days after austral midwinter (July)
from annual low of 035 g C m
−2 d
−1 , reaching maximal values in December–January, in
austral midsummer, when coastal eddies and upwelling (from multiple causes) are most
frequent. Chlorophyll biomass has a small dynamic range of 01–03 mg chl m
−3 taking
maximal values in early austral spring (Fig. 11.23).
New Zealand Coastal Province (NEWZ)
Extent of the Province
The NEWZ province comprises the continental shelf around New Zealand. In earlier
versions, the areas within the 1000-m isobath on the Campbell and Chatham plateaus to
south and east were included, but this was not a good idea: these plateaus, large relative
to the area of the continental shelf proper, are dominated by processes within the South
Subtropical Convergence. So, the data used previously to represent this province were
strongly aliased by events external to the shelf. In the version used here, the province is
defined strictly by the shelf edge fronts and consequently, because of the scale (2
× 2
)
of the gridded data in this work, it is not possible to derive adequate seasonal cycles of
chlorophyll and productivity from satellite images.
Continental Shelf Topography and Tidal and Shelf-Edge Fronts
New Zealand lies adjacent to the Chatham Rise that extends eastward and to the Campbell
plateau that lies to the south; these two extensive deep shoals are everywhere more
than 1000 m deep and lie beyond the relatively narrow shelf platform that covers about
435
0.23
0.30
0.38
0.46
0.53
0.12
0.18
0.24
0.30
0.36
SeaWiFS (AUSE): September 1997 - January 2002
Surface Chl (mg m
-3
)
Pt (gC m
-2
d
-1
)
Pt d
-1
Chl m
-3
1998
1999
2000
2001
0
20
40
60
80
100
0
5
10
15
20
Climatology (years)
Depth (m)
Production at DCM (%)
Zm (sigma)
Zeu
Pt (at DCM)
Fig. 11.23 AUSE: seasonal cycles of monthly surface chlorophyll and depth-integrated autotrophic production
for the years 1997–2002 from SeaWiFS data together with characteristic seasonal cycles of mixed-layer depths
from Levitus climatological data and photic depths computed from characteristic irradiance and the archive
of chlorophyll profiles discussed in Chapter 1.
A moderate productivity-rate increase is initiated 30 days after austral midwinter (July)
from annual low of 035 g C m
−2 d
−1 , reaching maximal values in December–January, in
austral midsummer, when coastal eddies and upwelling (from multiple causes) are most
frequent. Chlorophyll biomass has a small dynamic range of 01–03 mg chl m
−3 taking
maximal values in early austral spring (Fig. 11.23).
New Zealand Coastal Province (NEWZ)
Extent of the Province
The NEWZ province comprises the continental shelf around New Zealand. In earlier
versions, the areas within the 1000-m isobath on the Campbell and Chatham plateaus to
south and east were included, but this was not a good idea: these plateaus, large relative
to the area of the continental shelf proper, are dominated by processes within the South
Subtropical Convergence. So, the data used previously to represent this province were
strongly aliased by events external to the shelf. In the version used here, the province is
defined strictly by the shelf edge fronts and consequently, because of the scale (2
× 2
)
of the gridded data in this work, it is not possible to derive adequate seasonal cycles of
chlorophyll and productivity from satellite images.
Continental Shelf Topography and Tidal and Shelf-Edge Fronts
New Zealand lies adjacent to the Chatham Rise that extends eastward and to the Campbell
plateau that lies to the south; these two extensive deep shoals are everywhere more
than 1000 m deep and lie beyond the relatively narrow shelf platform that covers about