Attention:
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
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.
| Manufacturer | subCtech GmbH |
|---|---|
| Model | OceanPack SAE pCO2 Analyzer |
| Serial No. | n/a |
| Type | pCO2 Sensor |
Contacts
| Name | Institution | Role |
|---|---|---|
| Mario Hoppema | Alfred-Wegener-Institute | Principal Investigator |
| Mario Hoppema | Alfred-Wegener-Institute | Data Scientist |
| Thomas Liebe | Laeisz | Engineer In Charge |
Components
Position
Data logging, storage and archiving
Logged parameters
| Parameter | Sensor Output Type | Unit |
|---|---|---|
| CO2 air | CO2 | ppm |
| CO2 corrected water | CO2 | ppm |
| H2O air | wet bulk density | ppt |
| H2O density | wet bulk density | mmol/m^3 |
| xCO2 dry | CO2 | µmol/mol |
| CO2 density | CO2 | mmol/m^3 |
Central geographical ship's position and time standard
Geographical ship's position via DShip.
Rawdata storage on board
Dship
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
.Data must be corrected before final use. Corrected data can only be obtained after on land processing.
File format(s) |
stored in DShip system |
|---|---|
Calibration certificates |
NO |
Documentation
- Factsheet: pCO2 Analyser on R.V. Polarstern (Article, 37 kB)
Factsheet for pCO2 Analyser on board of R.V. Polarstern - OceanPack RACK MK-2 datasheet (Factsheet, 325 kB)