Global POC Distribution using Ocean Color and WOCE/JGOFS Beam Attenuation & POC Data
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Transcript of Global POC Distribution using Ocean Color and WOCE/JGOFS Beam Attenuation & POC Data
Global POC Distribution using Global POC Distribution using Ocean Color and WOCE/JGOFS Ocean Color and WOCE/JGOFS Beam Attenuation & POC DataBeam Attenuation & POC Data
Wilford D. GardnerWilford D. GardnerAlexey V. MishonovAlexey V. MishonovMary Jo RichardsonMary Jo Richardson
Department of Oceanography,Department of Oceanography,Texas A&M University, College StationTexas A&M University, College Station
WOCE/JGOFS & other data
Regional cp/POC RegressionsAtlantic Pacific
Ross Sea
Arabian Sea
0 1 2 3 4 5 6 7 8C p , m -1
0
5 00
10 00
15 00
20 00
PO
C, m
g C
m-3
g )R oss Sea
M odel II
0 0.2 0.4 0.6 0.8 1C p , m -1
0
50
1 00
1 50
2 00
2 50
PO
C, m
g C
m-3
f)A rabian Sea
M odel II
0 0.4 0.8 1.2 1.6 2C p, m -1
0
1 00
2 00
3 00
4 00
5 00
PO
C, m
g C
m-3
h )APFZ
M odel II
0 0.1 0.2 0.3 0.4 0.5C p, m -1
0
25
50
75
1 00
1 25
PO
C, m
g C
m-3
e)EqPac, TT012
M odel II
0 0 .05 0.1 0 .15 0.2C p , m -1
0
10
20
30
40
50
PO
C, m
g C
m-3
d )H O T
M odel II
0 0.1 0.2 0.3 0.4C p , m -1
0
20
40
60
80
1 00
PO
C, m
g C
m-3
c )BA TS
M odel II
0 0.2 0.4 0.6 0.8 1C p , m -1
0
50
1 00
1 50
2 00
2 50
PO
C, m
g C
m-3
b )C M O -96
M odel II
0 0.2 0.4 0.6 0.8 1 1.2C p , m -1
0
1 00
2 00
3 00
PO
C, m
g C
m-3
a )N AB E
M odel II
SAVE Data Set: Dec-Apr 1987-89
-6 0° -4 0° -2 0° 0° 2 0°
-6 0°
-4 0°
-2 0°
0°
-6 0° -4 0° -2 0° 0° 2 0°
-6 0°
-4 0°
-2 0°
0°
-6 0°
-4 0°
-2 0°
0°
C alcula tedOn e A tte nu atio n De pth , m
M ean POCwith in on e atten uatio n de pth, m g m -3
M ea n Bea m a tte nua tionw ith in on e atten ua tio n de pth; Cp , m -1
0
5
1 0
1 5
2 0
2 5
3 0
3 5
3 0
5 0
7 0
9 0
11 0
13 0
15 0
17 0
19 0
21 0
0
0.1
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0 1 00 2 00 3 00P O C, mg C m -3
0
0.2
0.4
0.6
0.8
1N ABE
N ABE, M od.II
B ATS
B ATS, M od.II
N ABE+BATS M od.II
0 20 40
0
0.1
0.2
a) b)
c ) d)
-8 0°
-7 0°
-6 0°
-5 0°
-4 0°
-8 0°
-7 0°
-6 0°
-5 0°
-4 0°
-19 0° -18 0° -17 0° -16 0° -19 0° -18 0° -17 0° -16 0°
-8 0°
-7 0°
-6 0°
-5 0°
-4 0°
-8 0°
-7 0°
-6 0°
-5 0°
-4 0°
0m
5m
10m
15m
20m
25m
30m
35m
40m
APFZ Data Set: Dec’97-Mar’98
k6 k7n k7s
k8 k9n k9s
OAD, m
Global One Attenuation Depth (OAD)
- 1 8 0 ° - 1 6 0 ° - 1 4 0 ° - 1 2 0 ° - 1 0 0 ° - 8 0 ° - 6 0 ° - 4 0 ° - 2 0 ° 0 ° 2 0 ° 4 0 ° 6 0 ° 8 0 ° 1 0 0 ° 1 2 0 ° 1 4 0 ° 1 6 0 ° 1 8 0 °- 8 0 °
- 6 0 °
- 4 0 °
- 2 0 °
0 °
2 0 °
4 0 °
6 0 °
8 0 °
5 m
1 0 m
1 5 m
2 0 m
2 5 m
3 0 m
3 5 m
-180° -160° -140° -120° -100° -80° -60° -40° -20° 0° 20° 40° 60° 80° 100° 120° 140° 160° 180°-80°
-60°
-40°
-20°
0°
20°
40°
60°
80°
Summer
Winter
z, m
SeaWiFS products vs cp regressions: SAVE () & APFZ () Data
0 4 8 12CH K ,mg m -2
0.1
1
c p,
m-1
0.2 0.4 0.6 0.8 1L W N(5 5 5 ), mW cm -2 m -1 sr-1
0.1
1
c p,
m-1
0 .04 0 .08 0 .12 0 .16K 490 , m -1
0.1
1
c p,
m-1
b )
0 0.4 0.8 1.2 1.6Ch l, mg m -3
0.1
1
c p,
m-1
a )
Chlorophyll concentration, mg m-3
Diffuse attenuation
coefficient K490, m-1
Normalizedwater-leavingradiance LWN(555),mW cm-2 m-1 sr-1
Integrated Chlorophyll CHK,
mg m-2
Global Beam Attenuation for OAD
Summer
Winter
-180° -160° -140° -120° -100° -80° -60° -40° -20° 0° 20° 40° 60° 80° 100° 120° 140° 160° 180°-80°
-60°
-40°
-20°
0°
20°
40°
60°
80°
- 1 8 0 ° - 1 6 0 ° - 1 4 0 ° - 1 2 0 ° - 1 0 0 ° - 8 0 ° - 6 0 ° - 4 0 ° - 2 0 ° 0 ° 2 0 ° 4 0 ° 6 0 ° 8 0 ° 1 0 0 ° 1 2 0 ° 1 4 0 ° 1 6 0 ° 1 8 0 °- 8 0 °
- 6 0 °
- 4 0 °
- 2 0 °
0 °
2 0 °
4 0 °
6 0 °
8 0 °
0 . 0 5
0 . 1
0 . 1 5
0 . 2
0 . 3
0 . 4
0 . 6
0 . 8
1
1 . 2
1 . 4
1 . 6
cp, m-1
POC=429.99Cp+27.75Slope SD=6.74R=0.884, n=883
0
100
200
300
400
500
0 0.2 0.4 0.6 0.8 1Cp, 1/m
PO
C, µ
g C
/LAPFZ - AESOPS
EqPac, TT012
Model II regression
Regional ocean-wide regressions
POC = 309.71*Cp + 0.46Slope SD = 3.77R = 0.941, n = 773
0
100
200
300
400
500
0 0.2 0.4 0.6 0.8 1Cp, 1/m
PO
C,m
g C
/L
BATS
NABE
Model II regressionAtlanticPacific
POC = 471.74 * Cp - 4.66Slope SD = 8.48R=0.875, n=726
0
50
100
150
200
250
0 0.1 0.2 0.3 0.4 0.5Cp, 1/m
PO
C, m
g C
/L
Arabian Sea - JGOFS
Model II regressionIndian
cp, m-1
POC, g m-3
Global POC in OAD
Summer
Winter
-180° -160° -140° -120° -100° -80° -60° -40° -20° 0° 20° 40° 60° 80° 100° 120° 140° 160° 180°-80°
-60°
-40°
-20°
0°
20°
40°
60°
80°
-180° -160° -140° -120° -100° -80° -60° -40° -20° 0° 20° 40° 60° 80° 100° 120° 140° 160° 180°-80°
-60°
-40°
-20°
0°
20°
40°
60°
80°
0
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POC, g m-3
Global integrated POC in OAD
Summer
Winter
-180° -160° -140° -120° -100° -80° -60° -40° -20° 0° 20° 40° 60° 80° 100° 120° 140° 160° 180°-80°
-60°
-40°
-20°
0°
20°
40°
60°
80°
-180° -160° -140° -120° -100° -80° -60° -40° -20° 0° 20° 40° 60° 80° 100° 120° 140° 160° 180°-80°
-60°
-40°
-20°
0°
20°
40°
60°
80°
0.8
1
1.5
2
3
4
5
6
7
POC, g m-2
Histograms
% of area covered by different concentration ranges
% of total global POC mass accounted for in areas with different concentration ranges
0
10
20
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1 2 3 4 5 6 7POC concentration, g m-2
% o
f a
rea
Area Summer %
Area Winter %
0
10
20
30
40
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60
1 2 3 4 5 6 7POC concentration, g m-2
% o
f to
tal
PO
C m
ass
POC Summer %
POC Winter %
Global total POC massin OAD layer:
Winter - 0.63 Gt C
Summer - 0.64 Gt C