Developments in marine pCO2 measurement technology; towards sustained in situ observations.
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Date
2017Author
Clarke, Jennifer S.
Achterberg, Eric P.
Connelly, Douglas P.
Schuster, Ute
Mowlem, Matthew
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Show full item recordAbstract
The oceanic uptake of anthropogenic CO2 causes pronounced changes to the marine carbonate system.
High quality pCO2 measurements with good temporal and spatial coverage are required to monitor the
oceanic uptake, identify regions with pronounced carbonate system changes, and observe the effectiveness
of CO2 emission mitigation strategies. There are currently several instruments available, but
many are unsuitable for autonomous deployments on in situ platforms such as gliders, moorings and
Argo floats.We assess currently available technology on its suitability for in situ deployment, with a focus
on optode technology developments.
Optodes for pCO2 measurements provide a promising new technological approach, and were successfully
calibrated over the range of 280e480 matm applying modified time-domain dual lifetime
referencing. A laboratory precision of 0.8 matm (n ¼ 10) and a response time (t90) of 165 s were achieved,
and with further development pCO2 optodes may become as wid.....
Journal
Trends in Analytical ChemistryVolume
88Page Range
pp.53-61Document Language
enBest Practice Type
Standard Operating ProcedureGuide
DOI Original
10.1016/j.trac.2016.12.008 0165-9936/Citation
Clarke, J.S.; Achterberg, E.P.; Connelly, D.P.; Schuster, U. and Mowlem, M. (2017) Developments in marine pCO2 measurement technology; towards sustained in situ observations . Trends in Analytical Chemistry, 88, pp.53-61. DOI: 10.1016/j.trac.2016.12.008 0165-9936/.Collections
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