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Global POC assessment based on transmissometer data. Alexey Mishonov Wilford Gardner Mary Jo Richardson. Texas A&M University Department of Oceanography. WOCE. POC. JGOFS. Other. Global Transmissometer & POC Data Coverage. - PowerPoint PPT Presentation
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Global POC assessment Global POC assessment based based
on transmissometer dataon transmissometer data
Global POC assessment Global POC assessment based based
on transmissometer dataon transmissometer data
Alexey Mishonov Alexey Mishonov Wilford Gardner Wilford Gardner Mary Jo Mary Jo RichardsonRichardson
Alexey Mishonov Alexey Mishonov Wilford Gardner Wilford Gardner Mary Jo Mary Jo RichardsonRichardson
Texas A&M University Texas A&M University Department of OceanographyDepartment of Oceanography
Texas A&M University Texas A&M University Department of OceanographyDepartment of Oceanography
SMP meeting, Woods Hole, July 2001
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Global Transmissometer & Global Transmissometer & POC Data CoveragePOC Data Coverage
POCWOCEJGOFSOther
SMP meeting, Woods Hole, July 2001
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Global Transmissometer Global Transmissometer database on the web: database on the web: http://www-ocean.tamu.edu/~pdgroup/DataDir/SMP-data.html
SMP meeting, Woods Hole, July 2001
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Beam C - POC relationship: Data Beam C - POC relationship: Data UsedUsed
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
• North Atlantic Bloom Experiment (NABE) DataNorth Atlantic Bloom Experiment (NABE) Data• Sampling Period: Apr-May 1989Sampling Period: Apr-May 1989• 21 stations/casts 21 stations/casts •Sampling depth: from 2 to 3200 mSampling depth: from 2 to 3200 m• 165 data pairs165 data pairs
• Bermuda Atlantic Time Series (BATS) DataBermuda Atlantic Time Series (BATS) Data• sampling period: 1990-1997sampling period: 1990-1997• 62 cruises/stations/casts62 cruises/stations/casts• Sampling depth: from 0.6 to 1000 mSampling depth: from 0.6 to 1000 m• 608 data pairs 608 data pairs
SMP meeting, Woods Hole, July 2001
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y = 278.91x
R2 = 0.3862
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2 0.25
y = 275.46x
R2 = 0.0827
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2 0.25
y = 289.45x
R2 = 0.2761
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2 0.25
y = 309.45x
R2 = 0.7393
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2 0.25
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
Winter Summer
Autumn Spring
BATS: Beam CBATS: Beam Cpp - POC - POC relationshiprelationship
Beam CBeam Cpp, m, m-1-1Beam CBeam Cpp, m, m-1-1Beam CBeam Cpp, m, m-1-1Beam CBeam Cpp, m, m-1-1
PO
C,
mg
mPO
C,
mg
m-3-3
PO
C,
mg
mPO
C,
mg
m-3-3
PO
C,
mg
mPO
C,
mg
m-3-3
PO
C,
mg
mPO
C,
mg
m-3-3
SMP meeting, Woods Hole, July 2001
6Atlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
773 data pairs
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1Beam Cp, m-1
PO
C, m
g m
-3
BATS NABE Regression
POC=BeamCp*311.5547+0.299
R=0.941
NABE & BATS: NABE & BATS: Beam CBeam Cpp - POC relationship - POC relationship
SMP meeting, Woods Hole, July 2001
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Beam CBeam Cpp - POC relationship: Data - POC relationship: Data UsedUsed
Pacific OceanPacific OceanPacific OceanPacific Ocean
Hawaii Ocean Time-series: Hawaii Ocean Time-series: 1991- 1991-19951995• 37 cruises / stations / casts37 cruises / stations / casts• 487 data pairs487 data pairs• Depth: 2.5 - 1050mDepth: 2.5 - 1050mHawaii Time Series data:
POC vs Beam Cp (n=476)
0
10
20
30
40
50
60
70
80
90
100
0 0.2 0.4 0.6 0.8 1Beam Cp, m-1
PO
C,
mg
m-3
0-100m 100-300m >300m
200
400
600
800
1000
1200
0
SMP meeting, Woods Hole, July 2001
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Beam CBeam Cpp - POC relationship: HOT - POC relationship: HOT
Pacific OceanPacific OceanPacific OceanPacific Ocean
0
200
400
600
Beam Cp vs POC
y = 545.64x + 5.667
R2 = 0.5618
y = 7.0624e34.087x
R2 = 0.7352
0
10
20
30
40
50
60
70
80
90
100
0 0.02 0.04 0.06 0.08 0.1Beam Cp, m-1
PO
C,
mg
m-3
SMP meeting, Woods Hole, July 2001
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S.A.V.E.: POC spatial distributionS.A.V.E.: POC spatial distribution
-70° -60° -50° -40° -30° -20° -10° 0° 10° 20°
-60°
-50°
-40°
-30°
-20°
-10°
0°
10°
SAVE-1SAVE-2SAVE-3SAVE-4SAVE-5SAVE-6
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
320
340
Calculated PO C averaged for upper layer (2-30m )SAVE1 - SAVE6 com bined data sets
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
SMP meeting, Woods Hole, July 2001
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Beam C & CZCS chl: S.A.V.E. dataBeam C & CZCS chl: S.A.V.E. data
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
CZCS CZCS Data Data fromfrom
SMP meeting, Woods Hole, July 2001
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35°N
40°N
-75°W -70°W -65°W
35°N
40°N
23.4 23.8 24.2 24.6 25 25.4 25.8 26.2
2 4 6 8 10 12 14 16 18 20 22 24 26
Density
SalinityTemperature
32 32.6 33.2 33.8 34.4 35 35.6 36.2
-75°W -70°W -65°W
0 20 40 60 80 100 120 140 160
POC, mg/m3
calculated
WBEX-1: POC spatial distributionWBEX-1: POC spatial distributionApril-May, 1986: mixed layer average (upper 30 m)
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
SMP meeting, Woods Hole, July 2001
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-70°W -65°W -60°W -55°W
35°N
40°N
45°N
2 4 6 8 10 12 14 16 18 20 22 24 26 32 32.8 33.6 34.4 35.2 36 36.4
35°N
40°N
45°N
23.4 23.8 24.2 24.6 25 25.4 25.8 26.2
Density
SalinityTemperature
-70°W -65°W -60°W -55°W
0 10 20 30 40 50 60 70 80 90100 120 140
POC, mg m-3
calculated
Oceanus-134: POC spatial Oceanus-134: POC spatial distributiondistribution
June-July 1983: mixed layer average (upper 30 m)
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
SMP meeting, Woods Hole, July 2001
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Global Transmissometer & Global Transmissometer & POC Data CoveragePOC Data Coverage
POCWOCEJGOFSOther
SMP meeting, Woods Hole, July 2001
Beam c & POC coverage + some Beam c & POC coverage + some FSU Beam c & POS data for FSU Beam c & POS data for
AtlanticAtlantic
NABE BATS HOT
WOCE
JGOFS
Other
FSU
FSU
Beam C
POC
SMP meeting, Woods Hole, July 2001
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Thank YouThank You
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