various OSCs typically found in coastal regions. For these waters, algorithm
tuning using local data or alternative algorithms may need to be developed to
address specific needs.
7.5 Major Findings
The validated Chl data products over the global ocean from the late 1990s to the
2010s led to numerous research findings on ocean changes over various temporal
and spatial scales. Such findings would have been impossible with traditional field
sampling efforts due to insufficient spatial and temporal coverage. Several review
articles (Yoder and Kennelly 2006; McClain et al. 2009), special volumes of
journals (Siegel et al. 2004a, b), and technical reports published by the International Ocean Colour Coordinating Group (IOCCG 2008, 2009) have provided
excellent summaries and references for major findings using satellite-based Chl
data products. Some of these findings as well as those from more recent studies are
briefly introduced here.
A major topic in Earth Science is the ocean’s response to climate variability,
where satellite ocean color observations play a key role in documenting ocean
changes at both global and regional scales. One example is the ocean’s response to
the El Niño–Southern Oscillation (ENSO) between 1997 and 2000. Behrenfeld
0.01
0.1
1
10
0.01
0.1
1
10
+
+
+
+
Sp Su F W
<5m:
5-10m:
10-20m:
20-50m:
>50m:
+
SeaWiFS Chl-a (mg m
-3
)
Measured Chl (mg m
-3
)
Fig. 7.7 Comparison between near-concurrent (±3 h) SeaWiFS and in situ Chl for the west
Florida Shelf (1998–2009). SeaWiFS Chl was derived from the OC4V6 algorithm. In situ Chl
were collected from rigorously quality controlled bio-optical measurements. a Cruise stations;
b Data were partitioned into four seasons (Spring–March 21 to June 20; Summer–June 21 to
September 22; Fall–September 23 to December 20; Winter–December 21 to March 20) and color
coded for different bottom depths. Figure adapted from Cannizzaro et al. (2013). Reprinted from
the Journal of Coastal Research, Cannizzaro, J. P., C. Hu, K. L. Carder, C. R. Kelble, N. Melo, E.
M. Johns, G. A. Vargo, and C. A. Heil, On the accuracy of SeaWiFS ocean color data products on
the West Florida Shelf, Copyright (2013), with permission from The Coastal Education and
Research Foundation, Inc
7 Oceanic Chlorophyll-a Content
187
tuning using local data or alternative algorithms may need to be developed to
address specific needs.
7.5 Major Findings
The validated Chl data products over the global ocean from the late 1990s to the
2010s led to numerous research findings on ocean changes over various temporal
and spatial scales. Such findings would have been impossible with traditional field
sampling efforts due to insufficient spatial and temporal coverage. Several review
articles (Yoder and Kennelly 2006; McClain et al. 2009), special volumes of
journals (Siegel et al. 2004a, b), and technical reports published by the International Ocean Colour Coordinating Group (IOCCG 2008, 2009) have provided
excellent summaries and references for major findings using satellite-based Chl
data products. Some of these findings as well as those from more recent studies are
briefly introduced here.
A major topic in Earth Science is the ocean’s response to climate variability,
where satellite ocean color observations play a key role in documenting ocean
changes at both global and regional scales. One example is the ocean’s response to
the El Niño–Southern Oscillation (ENSO) between 1997 and 2000. Behrenfeld
0.01
0.1
1
10
0.01
0.1
1
10
+
+
+
+
Sp Su F W
<5m:
5-10m:
10-20m:
20-50m:
>50m:
+
SeaWiFS Chl-a (mg m
-3
)
Measured Chl (mg m
-3
)
Fig. 7.7 Comparison between near-concurrent (±3 h) SeaWiFS and in situ Chl for the west
Florida Shelf (1998–2009). SeaWiFS Chl was derived from the OC4V6 algorithm. In situ Chl
were collected from rigorously quality controlled bio-optical measurements. a Cruise stations;
b Data were partitioned into four seasons (Spring–March 21 to June 20; Summer–June 21 to
September 22; Fall–September 23 to December 20; Winter–December 21 to March 20) and color
coded for different bottom depths. Figure adapted from Cannizzaro et al. (2013). Reprinted from
the Journal of Coastal Research, Cannizzaro, J. P., C. Hu, K. L. Carder, C. R. Kelble, N. Melo, E.
M. Johns, G. A. Vargo, and C. A. Heil, On the accuracy of SeaWiFS ocean color data products on
the West Florida Shelf, Copyright (2013), with permission from The Coastal Education and
Research Foundation, Inc
7 Oceanic Chlorophyll-a Content
187