stations:
DESCRIPTION
Fig.1. Location of the study site (23-28 S, 130-140 W). The background image is the annual water clarity (measured by Euphotic depth, in meters, Lee et al 2007 algorithm) of 2008 (from OBPG). Stations:. Rrs-derived a(420) [m -1 ]. 1:1. (a). a(420) [m -1 ]. Rrs-derived a ph (420) [m -1 ]. - PowerPoint PPT PresentationTRANSCRIPT
Fig.1. Location of the study site (23-28 S, 130-140 W). The background image is the annual water clarity (measured by Euphotic depth, in meters, Lee et al 2007 algorithm) of 2008 (from OBPG).
STB4_S1AA_L3a.mat
STB5_S1AA_L3a.mat
STB8_S1AA_L3a.matGyre4_S1AA_L3a.matgyre5_SAC_L3a.mat
Stations:
Fig.2. Comparison between remote-sensing inversions and values determined independently by other means, all at 420 nm. (a) total absorption; (b) particulate absorption; (c) gelbstoff absorption. Values for X-axis from Table 1 in Morel et al (2007).
0.006 0.008 0.010 0.012
0.006
0.008
0.010
0.012
a(420) [m-1]
ap(420) [m-1]
Rrs
-de
rive
d a
(42
0)
[m
-1]
0.001 0.002 0.003 0.004 0.0050.001
0.002
0.003
0.004
0.005
Rrs
-de
rive
d a
ph(4
20
) [
m-1]
0.001 0.002 0.003 0.004
0.001
0.002
0.003
0.004
ag(420) [m-1]
Rrs
-de
rive
d a
dg(4
20
) [
m-1]
1:1
1:11:1
(a)
(c)(b)
1/1/98 1/1/99 1/1/00 1/1/01 1/1/02 1/1/03 1/1/04 1/1/05 1/1/06 1/1/07 1/1/080.0005
0.0006
0.0007
0.0008
0.0009
Fig.3. Monthly times series of primary optical properties derived from SeaWiFS observations (1/1998 – 12/2007). (a): phytoplankton absorption coefficient (443 nm); (b) detritus/gelbstoff absorption coefficient (443 nm); (c) “particle” backscattering coefficient (555 nm). Overlaid on (a) and (b) are empirical models (open sysmbol) to highlight the seasonal and interannual dynamics.
1/1/98 1/1/99 1/1/00 1/1/01 1/1/02 1/1/03 1/1/04 1/1/05 1/1/06 1/1/07 1/1/08
0.003
0.004
0.005
0.006Datapattern
1/1/98 1/1/99 1/1/00 1/1/01 1/1/02 1/1/03 1/1/04 1/1/05 1/1/06 1/1/07 1/1/080.000
0.001
0.002
0.003datapattern
a ph(
44
3)
[m
-1]
a dg(
44
3)
[m
-1]
Month-Year Month-Year
Month-Year
b bp(
55
5)
[m
-1]
(a) (b)
(c)
1/1/981/1/991/1/001/1/011/1/021/1/031/1/041/1/051/1/061/1/071/1/080.000
0.001
0.002
0.003
0.004
backgroundreg.intensityreg.
1/1/98 1/1/99 1/1/00 1/1/01 1/1/02 1/1/03 1/1/04 1/1/05 1/1/06 1/1/07 1/1/080.0000
0.0005
0.0010
0.0015
0.0020
0.0025
0.0030
backgroundreg.intensityreg.
R2 = 0.108
Fig.4. Internannual dynamics of the background and seasonal intensity of aph and adg.
a ph(
44
3)
[m
-1]
Month-Year
R2 = 0.122
a dg(
44
3)
[m
-1]
Month-Year
R2 = 0.423
R2 = 0.042
21 22 23 24 25 26 27 280.000
0.001
0.002
0.003
21 22 23 24 25 26 27 280.002
0.003
0.004
0.005
0.006
SST [oC]
a ph(
44
3)
[m
-1]
a dg(
44
3)
[m
-1]
SST [oC]
Fig.5. Relationship between SST and aph (left), and between SST and adg (right) .
R2 = 0.106 R2 = 0.629
1/1/98 1/1/99 1/1/00 1/1/01 1/1/02 1/1/03 1/1/04 1/1/05 1/1/06 1/1/07 1/1/080.010
0.015
0.020
0.025
0.030
0.035
intensitybackground
Fig.6. (a) Monthly time series of chlorophyll-a concentration derived from SeaWiFS. Blue symbol and line for Chla derived from the aph results, with the formula from Bricaud et al (2004): aph(443) = 0.0654 Chla0.728. (b) As Fig.3, background and intensity of Chla, with Chla from the empirical OC4 algorithm.
1/1/98 1/1/99 1/1/00 1/1/01 1/1/02 1/1/03 1/1/04 1/1/05 1/1/06 1/1/07 1/1/080.00
0.01
0.02
0.03
0.04
0.05
Chla from aph
Chla from OC4
Ch
la
[mg
/m3 ]
Month-Year
Ch
la
[mg
/m3 ]
Month-Year