Monitoring a Sentinel Species from Satellites: Detecting Emiliania huxleyi in 25 Years of AVHRR Imagery - Satellite-based Applications on Climate Change - page 274

Bering Sea Iceland

0.5

0.5
0.4

0.4
0.3 0.3

0.2 0.2

0.1
0.0
1998

0.1
0.0

2000 2002 2004 2006 2008 1998 2000 2002 2004 2006 2008

Norwegian Sea Patagonian Shelf

0.12
0.10

0.5

0.4

0.08

0.3

0.06
0.04
0.02
0.00

0.2

0.1
0.0

2002 2004 2008 1998 2000 2002 2004 2006

1998 2000 2006 2008

Fig. 18.3 Fraction of area covered by E . huxleyi blooms each week detected by AVHRR ( blue )
and SeaWiFS ( red ) between 1998 and 2006 in the four regions with a 2-week smoothing

Bering Sea Iceland

1.0

1.0

0.8

0.8
0.6

0.6

0.4

0.4

0.2

0.2
0.0

0.0

1985 1990 1995 2000 2005 1985 1990 1995 2000 2005

Norwegian Sea Patagonian Shelf

1.0

1.0

0.8

0.8

0.6

0.6

0.4

0.4

0.2

0.2

0.0

0.0

1985 1990 1995 2000 2005 1985 1990 1995 2000 2005

Fig. 18.4 Fraction of area covered by E . huxleyi blooms from 1982 to 2006 in the four regions.
Weekly bloom episodes are plotted as lines as in Fig. 18.3 ; diamonds ( ) show integrated annual

amounts normalized by the maximum for the time series. Regression lines for the annual values are
superimposed with slopes, standard errors, correlation coefficients, and probabilities itemized in
Table 18.1

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