Automated spectrophotometric determination of carbonate ion concentration in seawater using a portable syringe pump based analyzer

Shangguan, Qipei; Shu, Huilin; Li, Peicong; Lin, Kunning; Byrne, Robert H.; Li, Quanlong; Yuan, Dongxing; Ma, Jian

doi:10.1016/j.marchem.2019.01.007

Cited by 9 publications

(4 citation statements)

References 34 publications

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“…Previous studies have shown that inorganic carbon has a inhibition threshold of 36-45 mg L − 1 for AOB, while there is almost no limit for NOB [60,61]. In this study, the concentration of inorganic carbon (about 158-161 mg L − 1 , mainly carbonate [62] and bicarbonate [63]) in simulated seawater toilet flushing wastewater was consistent with that in seawater because it was prepared with natural sea salt. In addition, organics degradation and CO 2 supply from aeration can also supplement inorganic carbon in wastewater for autotrophic bacteria growth [60].…”

Section: Cod/n Ratio Regulated the Self-assembly Of Microbiomessupporting

confidence: 81%

Self-assembly of ammonium assimilation microbiomes regulated by COD/N ratio

Han

Zhang

et al. 2023

Chemical Engineering Journal

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Section: Cod/n Ratio Regulated the Self-assembly Of Microbiomessupporting

confidence: 81%

Self-assembly of ammonium assimilation microbiomes regulated by COD/N ratio

Han

Zhang

et al. 2023

Chemical Engineering Journal

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“…Similarly, water temperature, wind speed, and the airsea difference in the partial pressure of carbon dioxide ( pCO 2 ; which is a component of the inorganic carbon ECV) are important factors in determining the air-sea flux of carbon dioxide (CO 2 ; Watson et al, 2009). Ocean acidification is recognized as a major threat to the marine environment and methods for measuring ocean pH directly or indirectly via automated systems are just becoming available for use on ships (e.g., Shangguan et al, 2019). The water cycle drives tropical atmospheric circulation and is therefore a key component of climate and weather.…”

Section: Monitoring and Process Studiesmentioning

confidence: 99%

Ship-Based Contributions to Global Ocean, Weather, and Climate Observing Systems

et al. 2019

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The role ships play in atmospheric, oceanic, and biogeochemical observations is described with a focus on measurements made near the ocean surface. Ships include merchant and research vessels; cruise liners and ferries; fishing vessels; coast guard, military, and other government-operated ships; yachts; and a growing fleet of automated surface vessels. The present capabilities of ships to measure essential climate/ocean variables and the requirements from a broad community to address operational, commercial, and scientific needs are described. The authors provide a vision to expand observations needed from ships to understand and forecast the exchanges across the ocean-atmosphere interface. The vision addresses (1) recruiting vessels to improve both spatial and temporal sampling, (2) conducting multivariate sampling on ships, (3) raising technology readiness levels of automated shipboard sensors and ship-to-shore data communications, (4) advancing quality evaluation of observations, and (5) developing a unified data management approach for observations and metadata that meet the needs of a diverse user community. Recommendations are made focusing on integrating private and autonomous vessels into the observing system, investing in sensor and communications technology development, developing an integrated data management structure that includes all types of ships, and moving toward a quality evaluation process that will result in a subset of ships being defined as mobile reference ships that will support climate studies. We envision a future where commercial, research,

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“…This method is proposed to be ready for implementation in sustained observations and internal consistency studies. 25,26 However, its implementation still needs to be validated by independent research groups.…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, most studies would benefit from moving [CO 3 2– ] from its category of a derived variable to become the fifth measurable seawater CO 2 system variable, thus allowing efficient ways of approaching questions relative to CaCO 3 cycling from [CO 3 2– ] direct determinations. , To this end, Byrne and Yao first proposed a spectrophotometric method to determine [CO 3 2– ] in seawater. This method is proposed to be ready for implementation in sustained observations and internal consistency studies. , However, its implementation still needs to be validated by independent research groups.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric Measurement of Carbonate Ion in Seawater over a Decade: Dealing with Inconsistencies

Guallart

Fajar

García-Ibáñez

et al. 2022

Environ. Sci. Technol.

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The spectrophotometric methodology for carbonate ion determination in seawater was first published in 2008 and has been continuously evolving in terms of reagents and formulations. Although being fast, relatively simple, affordable, and potentially easy to implement in different platforms and facilities for discrete and autonomous observations, its use is not widespread in the ocean acidification community. This study uses a merged overdetermined CO 2 system data set (carbonate ion, pH, and alkalinity) obtained from 2009 to 2020 to assess the differences among the five current approaches of the methodology through an internal consistency analysis and discussing the sources of uncertainty. Overall, the results show that none of the approaches meet the climate goal (± 1 % standard uncertainty) for ocean acidification studies for the whole carbonate ion content range in this study but usually fulfill the weather goal (± 10 % standard uncertainty). The inconsistencies observed among approaches compromise the consistency of data sets among regions and through time, highlighting the need for a validated standard operating procedure for spectrophotometric carbonate ion measurements as already available for the other measurable CO 2 variables.

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Automated spectrophotometric determination of carbonate ion concentration in seawater using a portable syringe pump based analyzer

Cited by 9 publications

References 34 publications

Self-assembly of ammonium assimilation microbiomes regulated by COD/N ratio

Self-assembly of ammonium assimilation microbiomes regulated by COD/N ratio

Ship-Based Contributions to Global Ocean, Weather, and Climate Observing Systems

Spectrophotometric Measurement of Carbonate Ion in Seawater over a Decade: Dealing with Inconsistencies

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