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| Titel |
Improvement and use of an optical pCO2 sensor in the marine environment |
| VerfasserIn |
D. Atamanchuk, P. O. J. Hall, A. Tengberg, J. Hovdenes, P. J. Thomas, A. Apostolidis |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250066145
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| Zusammenfassung |
| There are several reasons to monitor CO2 in aquatic environments. In, for example, aquaculture high pCO2 will be toxic to the animals and inhibit growth and in climate/ocean global warming studies it is essential to assess if different marine environments are sinks or sources of CO2. Commercially available systems for pCO2 measurements exist, but they are bulky and their energy consumption is relatively high.
Fluorescence dual lifetime detection was implemented in a compact deep sea rated optical CO2 sensor. We present results from laboratory and fieldwork with these sensors focusing on:
• foil contamination, cross sensitivity and foil pre-conditioning;
• different calibrations methods;
• stability during longer (1-12 months) in situ deployments on marine observatories;
• acid addition to determine both pCO2 and Dissolved Inorganic Carbon (DIC) on the same water sample;
• sediment-water flux measurements using autonomous benthic landers in situ. |
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