Brief Overview of the Arctic Mediterranean Seas Data in CARINA
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Brief Overview of the Arctic Mediterranean Seas Data in CARINA
Are Olsen, Robert Key, Eva Falck, Emil Jeanson, Anders Olsson, Sara Jutterström, Leif Anderson, Ingunn Skjelvan,
Benjamin Pfeil, Jon Olafsson, Thorarinn Aranarson
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GLODAP (Key et al.) data in the Arctic
• Only ~20 stations north of Greenland Scotland
ridge.
• None in the Arctic!
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Arctic Mediterranean Seas Data in CARINA
Data from 53 cruises, 1982 – 2003
Region: Nordic SeasArctic OceanBaffin Bay, Canadian Archipelago
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Arctic Data
SBI - spring
Oden 91
Polarstern 96
AO
S 94
Northwater Polynya
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Arctic Data
SBI - spring
Oden 91
Polarstern 96
AO
S 94
Pol
arst
ern
93
Tundra 94
JOIS 97
SBI SUMMER
YMER 80
Northwater Polynya
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Nordic Seas data
Iceland time series
Hudson 82Since early 90’s:ESOP1ESOP 2TRACTORIMR/PMEL/Brookhaven/Kiel tracer data
Northeast water Polynya
Norwegian Projects 99-02
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Issues
• Precision• Accuracy• Trends
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precision/accuracy/trends
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precision/accuracy/trends
null out im
precise data
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precision/accuracy/trends
2160
1982 2002
2160
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precision/accuracy/trends
20 % = 2 mol kg-1
-20 % = -2 mol kg-1
Adjustments from first inversion of crossover results
110 crossover analyses for each of DIC, At, nutrients, Salinity, oxygen, CFCs, 300-400 km radius, >2000 m, mostly Greenland Basin. Totalling 660 results
’82 cruise
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precision/accuracy/trends
2160
1982
2160
2002
-20 mol/kg
DIC DIC
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precision/accuracy/trends
2160
1982
2160
2002
-20 mol/kg
DIC DIC
-25 mol/kg
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precision/accuracy/trends
Locking points.Use these to defineany trend and evaluateadjustements in light of this
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Summary
• Data from 53 cruises covering Nordic Seas, Arctic Ocean and marginal seas have been gathered in one collection.
• Where possible (depends on region) the quality of data has been assessed.
• Xover analysis and inversion is being carried out to ensure internal consistency and determine adjustments.
• Other methods: MLR, basin averages
• Have to be careful and not overdo so trends are preserved, this is the tricky part.