Measurement of sea surface partial pressure of C02 from a moored buoy

Friederich, Gernot; Brewer, Peter G.; Herlien, R.; Chávez, Francisco P.

doi:10.1016/0967-0637(95)00044-7

Cited by 67 publications

(54 citation statements)

References 12 publications

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“…Standards or CRMs [24,25] can be used for pH, DIC, or AT, but there is no practical in situ standardization method for fCO2 sensors. Even infraredbased in situ sensors (e.g., [7]) calibrate only the infrared analyzer and not the equilibration process that, by itself, can contribute significantly to analytical errors [26]. For facile use of CRMs in situ, there is a vital need to extend Andrew Dickson's CRM program whereby CRMs are distributed in durable, gasimpermeable bags suitable for deployment in situ.…”

Section: Sensor Calibration and Enhancement Of Measurement Accuracymentioning

confidence: 99%

“…response is based on light absorption by an indicator dye at one or more wavelengths [6,7,8,9]. Measurement of CO2 by means of infrared absorption in an equilibrated seawater headspace is also common.…”

Section: Strategies For Obtaining Comprehensive Co2 System Characterimentioning

confidence: 99%

“…Here equilibration can be achieved by either different equilibrator designs (e.g. a bubble-type equilibrator [7]) or by means of membranes in different forms [10]. Other types of pCO 2 and pH instruments are in development [11,12,13].…”

Section: Strategies For Obtaining Comprehensive Co2 System Characterimentioning

confidence: 99%

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Sensors and Systems for In Situ Observations of Marine Carbon Dioxide System Variables

Byrne¹,

DeGrandpre²,

Short³

et al. 2010

Proceedings of OceanObs'09: Sustained Ocean Observations and Information for Society

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Autonomous chemical sensors are required to document the marine carbon dioxide system's evolving response to anthropogenic CO2 inputs, as well as impacts on short-and long-term carbon cycling. Observations will be required over a wide range of spatial and temporal scales, and measurements will likely need to be maintained for decades. Measurable CO2 system variables currently include total dissolved inorganic carbon (DIC), total alkalinity (AT), CO2 fugacity (fCO2), and pH, with comprehensive characterization requiring measurement of at least two variables. These four parameters are amenable to in situ analysis, but sustained deployment remains a challenge. Available methods encompass a broad range of analytical techniques, including potentiometry, spectrophotometry, conductimetry, and mass spectrometry. Instrument capabilities (precision, accuracy, endurance, reliability, etc.) are diverse and will evolve substantially over the time that the marine CO2 system undergoes dramatic changes. Different suites of measurements/parameters will be appropriate for different sampling platforms and measurement objectives.

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Section: Sensor Calibration and Enhancement Of Measurement Accuracymentioning

confidence: 99%

Section: Strategies For Obtaining Comprehensive Co2 System Characterimentioning

confidence: 99%

See 1 more Smart Citation

Sensors and Systems for In Situ Observations of Marine Carbon Dioxide System Variables

Byrne¹,

DeGrandpre²,

Short³

et al. 2010

Proceedings of OceanObs'09: Sustained Ocean Observations and Information for Society

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show abstract

“…Unfortunately, most parameters of biogeochemical interest are not readily measured on moorings. However, recent technological breakthroughs have made it possible to measure seawater pC0, on moorings (DeGrandpre 1993;DeGrandpre et al 1995a;Friederich et al 1995). In this study we have used our Submersible Autonomous Moored Instruments for seawater CO, (DeGrandpre 1993;DeGrandpre et al 1995a), also known as SAMI-CO,, to measure ocean pC0,.…”

mentioning

confidence: 99%

Simultaneous mooring‐based measurements of seawater CO2 and O2 off Cape Hatteras, North Carolina

DeGrandpre

Hammar

Wallace

et al. 1997

Limnology & Oceanography

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We deployed CO, and 0, sensors on the U.S. continental shelf off Cape Hatteras, North Carolina, during late summer 1994. A continuous 32-d gas record was obtained at 20 m in 25 m of water, below the thermocline for most of the period. Analysis of the correlation between CO, and 0, indicates that biological and advective processes dominated the gas variability, with small or insignificant fluxes due to air-sea exchange, vertical eddy diffusion, and carbonate dissolution or formation. The observed 0, : CO, correlation was 1.39, within the range predicted for the photosynthetic quotient. Photosynthesis and respiration appeared to be tightly coupled, resulting in no net community production in these waters during the late summer. It is evident from these results that the combination of mooring-based CO, and 0, measurements will be a powerful tool for studying the marine carbon cycle.

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“…A pCO 2 measurement system, first introduced by Friedrich et al (1995), was further developed and tested as part of…”

mentioning

confidence: 99%

The NOPP O-SCOPE and MOSEAN Projects: Advanced Sensing for Ocean Observing Systems

Dickey¹,

Bates²,

Byrne³

et al. 2009

Oceanog.

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Measurement of sea surface partial pressure of C02 from a moored buoy

Cited by 67 publications

References 12 publications

Sensors and Systems for In Situ Observations of Marine Carbon Dioxide System Variables

Sensors and Systems for In Situ Observations of Marine Carbon Dioxide System Variables

Simultaneous mooring‐based measurements of seawater CO2 and O2 off Cape Hatteras, North Carolina

The NOPP O-SCOPE and MOSEAN Projects: Advanced Sensing for Ocean Observing Systems

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