Attention:
Please note: The system was deinstalled in May 2024.
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 |
| REGISTRY-Link | ↪ REGISTRY (74) |
Contacts
| Name | Institution | Role |
|---|---|---|
| Mario Hoppema | Alfred Wegener Institute for Polar and Marine Research | Principal Investigator, Data Scientist |
| Hauke Becker | Alfred Wegener Institute for Polar and Marine Research | Engineer In Charge |
Components
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.
Position
| Info | no xyz-position given, device located in G707 |
| X | 0.0 (no unit given) |
| Y | 0.0 (no unit given) |
| Z | 0.0 (no unit given) |
Data logging, storage and archiving
Logged parameters
| Parameter | O2ARegistry Output Type | Unit |
|---|---|---|
| CO2 air | CO2 | ppm |
| CO2 corrected water | CO2 | ppm |
| CO2 density | CO2 | μmol/m3 |
| H2O air | wet bulk density | ppt |
| H2O density | wet bulk density | μmol/m3 |
| xCO2 dry | CO2 | μmol/mol |
Central geographical ship's position and time standard
Time synchronising is regulated via DShip.
Geographical ship's position via DShip.
Geographical ship's position via DShip.
Rawdata storage on board
Data storage in the instrument itself and in the DShip system.
Dship
Uncorrected measurement data.
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
After the cruise the (uncorrected) DShip data set can be extracted from https://dship.awi.de/
.
Data must be corrected before final use. Corrected data can only be obtained after on land processing.
.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)
Factsheet for pCO2 Analyser on board of R.V. Polarstern -
OceanPack RACK MK-2 datasheet (Factsheet, 325 kB)
