High-Frequency Spectrophotometric Measurements of Total Dissolved Inorganic Carbon in Seawater

2013 ◽  
Vol 47 (14) ◽  
pp. 7840-7847 ◽  
Author(s):  
Zhaohui Aleck Wang ◽  
Sophie N. Chu ◽  
Katherine A. Hoering
Keyword(s):  
High Frequency ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Total Dissolved Inorganic Carbon

scholarly journals Texas A&M University Radiocarbon Dates IV

Radiocarbon ◽  
1978 ◽  
Vol 20 (3) ◽  
pp. 455-460 ◽  
Author(s):  
R A Parker ◽  
W M Sackett
Keyword(s):  
Water Column ◽  
Mississippi River ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
River Delta ◽  
Cariaco Basin ◽  
Mississippi River Delta ◽  
Radiocarbon Dates ◽  
Carbonate Carbon ◽  
Total Dissolved Inorganic Carbon

Organic and carbonate carbon in sediments deposited in the Cariaco Basin and on the Mississippi River Delta and the total dissolved inorganic carbon in four water column profiles comprise the samples in this list. Except as noted below the samples were processed using the benzene synthesis and other procedures described by Mathews, et al (1972).

In Situ Sensor Technology for Simultaneous Spectrophotometric Measurements of Seawater Total Dissolved Inorganic Carbon and pH

2015 ◽  
Vol 49 (7) ◽  
pp. 4441-4449 ◽  
Author(s):  
Zhaohui Aleck Wang ◽  
Frederick N. Sonnichsen ◽  
Albert M. Bradley ◽  
Katherine A. Hoering ◽  
Thomas M. Lanagan ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Sensor Technology ◽  
Total Dissolved Inorganic Carbon ◽  
In Situ Sensor

scholarly journals Hydrogeochemical Characters of Karst Aquifers in Central Italy and Relationship with Neotectonics

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1926
Author(s):  
Paolo Madonia ◽  
Marianna Cangemi ◽  
Ygor Oliveri ◽  
Carlo Germani
Keyword(s):  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Central Italy ◽  
Karst Aquifers ◽  
Chemical Parameters ◽  
Physical Chemical ◽  
Preparatory Phase ◽  
Dissolved Ions ◽  
Total Dissolved Inorganic Carbon ◽  
Karst Systems

Groundwater from karst circulation systems of Central Italy were sampled and analyzed, in 2018, for delineating a preliminary, general geochemical framework of their relationship with neotectonics, in an area characterized by a frequent and often destructive seismicity. We determined field physical-chemical parameters, concentrations of main dissolved ions and gases and isotopic composition of water (δ18O, δD) and total dissolved inorganic carbon (δ13C TDIC). We discriminated between “normal” hydro-karst systems and multi-component aquifers, composed of meteoric groundwater that have also interacted with rocks of different lithological nature and/or deep fluids. These multicomponent aquifers are of potential interest in the monitoring of neotectonics activity, because changes in the stress field associated with the preparatory phase of an earthquake may affect the permeability of rocks, in turn causing variation of their chemical-isotopic character. The geographical distribution of these aquifers seems to be controlled by tectonics. In fact, the Olevano–Antrodoco–Sibillini thrust separates the more anomalous sites, located westwards of it, from the groundwater bodies at its eastern side, showing a more typical karst character.

scholarly journals Technical Note: Precise quantitative measurements of total dissolved inorganic carbon from small amounts of seawater using a gas chromatographic system

2013 ◽  
Vol 10 (10) ◽  
pp. 6601-6608 ◽  
Author(s):  
T. Hansen ◽  
B. Gardeler ◽  
B. Matthiessen
Keyword(s):  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Biological Effects ◽  
Total Sample ◽  
Measurement Range ◽  
Technical Note ◽  
Infrared Detection ◽  
Detection Methods ◽  
Total Dissolved Inorganic Carbon ◽  
Ct Measurement

Abstract. Total dissolved inorganic carbon (CT) is one of the most frequently measured parameters used to calculate the partial pressure of carbon dioxide in seawater. Its determination has become increasingly important because of the rising interest in the biological effects of ocean acidification. Coulometric and infrared detection methods are currently favored in order to precisely quantify CT. These methods however are not sufficiently validated for CT measurements of biological experiments manipulating seawater carbonate chemistry with an extended CT measurement range (~1250–2400 μmol kg–1) compared to natural open ocean seawater (~1950–2200 μmol kg−1). The requirement of total sample amounts between 0.1–1 L seawater in the coulometric- and infrared detection methods potentially exclude their use for experiments working with much smaller volumes. Additionally, precise CT analytics become difficult with high amounts of biomass (e.g., phytoplankton cultures) or even impossible in the presence of planktonic calcifiers without sample pre-filtration. Filtration however, can alter CT concentration through gas exchange induced by high pressure. Addressing these problems, we present precise quantification of CT using a small, basic and inexpensive gas chromatograph as a CT analyzer. Our technique is able to provide a repeatability of ±3.1 μmol kg−1, given by the pooled standard deviation over a CT range typically applied in acidification experiments. 200 μL of sample is required to perform the actual CT measurement. The total sample amount needed is 12 mL. Moreover, we show that sample filtration is applicable with only minor alteration of the CT. The method is simple, reliable and with low cumulative material costs. Hence, it is potentially attractive for all researchers experimentally manipulating the seawater carbonate system.

scholarly journals Nordic Seas total dissolved inorganic carbon data in CARINA

2009 ◽  
Vol 1 (1) ◽  
pp. 35-43 ◽  
Author(s):  
A. Olsen
Keyword(s):  
Quality Control ◽  
Southern Ocean ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
The Arctic ◽  
Nordic Seas ◽  
Uptake Rates ◽  
Systematic Biases ◽  
Total Dissolved Inorganic Carbon ◽  
Oceanic Carbon

Abstract. Water column data of carbon and carbon relevant hydrographic and hydrochemical parameters from 188 previously non-publicly available cruises in the Arctic, Atlantic, and Southern Ocean have been retrieved and merged into a new database: CARINA (CARbon IN the Atlantic). The data have been subject to rigorous quality control (QC) in order to ensure highest possible quality and consistency. The data for most of the parameters included were examined in order to quantify systematic biases in the reported values, i.e. secondary quality control. Significant biases have been corrected for in the data products, i.e. the three merged files with measured, calculated and interpolated values for each of the three CARINA regions; the Arctic Mediterranean Seas (AMS), the Atlantic (ATL) and the Southern Ocean (SO). With the adjustments the CARINA database is consistent both internally as well as with GLODAP (Key et al., 2004) and is suitable for accurate assessments of, for example, oceanic carbon inventories and uptake rates and for model validation. The Arctic Mediterranean Seas includes the Arctic Ocean and the Nordic Seas, and the quality control was carried out separately in these two areas. This contribution presents an account of the quality control of the total dissolved inorganic carbon (TCO2) data from the Nordic Seas in CARINA. Out of the 35 cruises from the Nordic Seas included in CARINA, 25 had TCO2 data. The data from 7 of these were found to be of low quality and should not be used, thus the final CARINA data product contains TCO2 data from 18 cruises from the Nordic Seas. These data appear consistent to at least 4 μmol kg−1.

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