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Please note: The system runs continuously during all cruises. Support is given by the board electricians. Plaease ask them if you need specific info, or contact the responsible AWI scientist. |
Summary
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Components
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The system consists of a flow-through unit for CO2 extraction at a membrane and CO2 detection by a Li-cor Infra Red (IR) analyser. The instrument reports "mole fraction of CO2 in wet air [ppm]". Values of "pCO2 [µatm] can only be obtained with shore-based data processing. |
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The OceanPack Sea-Air-Exchange system measures the partial pressure of CO2 (pCO2) in seawater using membrane equilibration and Li-cor IR analyser for CO2 detection. The instrument reports mole fraction of CO2 in wet air in ppm. Values of pCO2 in microatm can only be obtained with shore-based data processing. |
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Contacts
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Components
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Position
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Data logging, storage and archiving
Logged parameters
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Central geographical ship's position and time standard
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Time synchronising is regulated via DShip.
Geographical ship's position via DShip. | ||
Rawdata storage on board
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| Data storage in the instrument itself and in the DShip system.
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Dship
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Uncorrected measurement data. | ||
| Metadata list |
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|| Device name | OceanPack pCO2 Analyzer ||
|| Parameters| xCO2 (air) \[ppm\]; xCO2 corrected (water) \[ppm\]; CO2 concentration\[mmol/m3\]; pressure difference (membrane; licor) \[mbar\]; xH2O (air) \[ppt\]; H2O concentration \[mmol/m3\]; xCO2 dry \[µmol/mol\] || |
Data archiving on land
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After the cruise the (uncorrected) DShip data set can be extracted from https://dms.awi.de.
Data must be corrected before final use. Corrected data can only be obtained after on land processing. |
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|| File format(s) | stored in DShip system ||
|| Calibration certificates | NO || |
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Documentation
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