An autonomous instrument for time series analysis of TCO2 from oceanographic moorings

Sayles, F.L.; Eck, C.

doi:10.1016/j.dsr.2009.04.006

Cited by 36 publications

(52 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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. The authors of [14] have shown that DIC levels are stable for long periods when CRMs are stored in polyethylenecoated aluminum bags (Fig. 2).…”

Section: Sensor Calibration and Enhancement Of Measurement Accuracymentioning

confidence: 99%

“…Exceptional analytical performance is required for these measurements (<0.1% precision and accuracy), and the shipboard techniques that have achieved this have done so through complex automated fluidic designs with frequent calibrations. Some groups have built prototype sensors for DIC [12,14] and AT [15] by using simplified detection methods. These systems are the most promising near-term prospects for full CO2 system characterization; however, they all require moving parts in the form of pumps and valves.…”

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

View full text Add to dashboard Cite

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.

show abstract

Section: Sensor Calibration and Enhancement Of Measurement Accuracymentioning

confidence: 99%

Section: Strategies For Obtaining Comprehensive Co2 System Characterimentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…As an alternative to the use of pH and fCO 2 as paired parameters, in situ measurements of DIC or A T can be used to provide compatible analytical pairs: DIC plus either pH or fCO 2 , and A T plus either pH or fCO 2 . Consequently, efforts are currently being devoted to measure an expanded set of in situ parameters (Choi et al 2002;Martz et al 2006;Byrne and Yao 2008;Sayles and Eck 2009).…”

mentioning

confidence: 99%

In situ determination of total dissolved inorganic carbon by underwater membrane introduction mass spectrometry

Bell

Short

Byrne

2011

Limnology & Ocean Methods

View full text Add to dashboard Cite

Procedures have been developed for the determination of total dissolved inorganic carbon (DIC) in acidified seawater using an underwater mass spectrometer. Factors affecting the response of the membrane introduction mass spectrometer (MIMS) system were examined to optimize calibrations and enhance the accuracy of component ocean carbon system measurements. Laboratory studies examined the following influences on MIMS measurements of DIC: bicarbonate and carbonate contributions to the MIMS CO 2 signal intensity, linearity of MIMS response over a wide range of carbon dioxide concentrations, influence of sample salinity on membrane permeability, and capability to use acidified solutions for calibrations of both DIC and CO 2 fugacity. It was observed that (a) bicarbonate and carbonate contributions to carbon dioxide signal intensity were significant at slow flow rates, (b) MIMS response was linearly dependent on DIC within the concentration range of interest, (c) salinity has a discernable influence on membrane permeability that is, in turn, dependent on hydrostatic pressure, and (d) well calibrated MIMS measurements for both DIC and CO 2 fugacity can be obtained using acidified DIC standards. High flow rates are required during CO 2 fugacity measurements in circumneutral seawater to eliminate signal contributions from bicarbonate and carbonate.

show abstract

“… IR--based discrete sampling instruments  Spectrophotometry (Wang et al, In press;Wang et al, 2007)  Robotic Analyzer for the TCO 2 System (RATS) (Sayles and Eck, 2009) …”

Section: Emerging Technologymentioning

confidence: 99%

Monitoring Ocean Change in the 21st Century

Neuer¹,

Benway²,

Bates³

et al. 2017

Eos

View full text Add to dashboard Cite

show abstract

An autonomous instrument for time series analysis of TCO2 from oceanographic moorings

Cited by 36 publications

References 21 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

In situ determination of total dissolved inorganic carbon by underwater membrane introduction mass spectrometry

Monitoring Ocean Change in the 21st Century

Contact Info

Product

Resources

About