DISCRETE WATER COLUMN MEASUREMENTS OF CO2 FUGACITY AND PH(T) IN SEAWATER: A COMPARISON OF DIRECT MEASUREMENTS AND THERMODYNAMIC CALCULATIONS
The NOAA Eq. Pac. CO2 system data set (similar or equal to 2500 water samples) has been evaluated to assess the internal consistency of measurements and calculations involving CO2 fugacity and pH(T). This assessment represents the first large scale field comparison of pH(T) and f(CO2) data. Comparis...
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Language: | English |
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ELSEVIER SCIENCE BV
1998
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Online Access: | https://oasis.postech.ac.kr/handle/2014.oak/28523 https://doi.org/10.1016/S0304-4203(97)00080-7 |
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ftponangunivst:oai:oasis.postech.ac.kr:2014.oak/28523 2023-05-15T15:52:54+02:00 DISCRETE WATER COLUMN MEASUREMENTS OF CO2 FUGACITY AND PH(T) IN SEAWATER: A COMPARISON OF DIRECT MEASUREMENTS AND THERMODYNAMIC CALCULATIONS McElligott, S Byrne, RH Lee, K Wanninkhof, R Millero, FJ Feely, RA 환경공학부 10056383 Lee, K 1998-02 https://oasis.postech.ac.kr/handle/2014.oak/28523 https://doi.org/10.1016/S0304-4203(97)00080-7 English eng ELSEVIER SCIENCE BV MARINE CHEMISTRY 60 1-2 63 73 SCI급, SCOPUS 등재논문 SCI Chemistry, Multidisciplinary Oceanography Chemistry 0304-4203 1998-OAK-0000017800 https://oasis.postech.ac.kr/handle/2014.oak/28523 doi:10.1016/S0304-4203(97)00080-7 206 MARINE CHEMISTRY, v.60, no.1-2, pp.63 - 73 000073507500006 seawater carbon dioxide fugacity spectrophotometric pH measurements thermodynamic calculations CARBONIC-ACID DISSOCIATION-CONSTANTS PH MEASUREMENTS CONSISTENCY SYSTEM Article ART Article; Proceedings Paper 1998 ftponangunivst https://doi.org/10.1016/S0304-4203(97)00080-7 2022-10-20T20:18:33Z The NOAA Eq. Pac. CO2 system data set (similar or equal to 2500 water samples) has been evaluated to assess the internal consistency of measurements and calculations involving CO2 fugacity and pH(T). This assessment represents the first large scale field comparison of pH(T) and f(CO2) data. Comparisons of direct discrete CO2 fugacity (f(CO2)) measurements with CO2 fugacity calculated from total inorganic carbon (C-T), total alkalinity (A(T)) and spectrophotometric pH (pH(T) = -log[H+](T)) indicate that a variety of improvements are needed in the parameter measurements and thermodynamic relationships used to relate f(CO2), C-T, A(T) and pH(T) in seawater. CO2 fugacity calculated from C-T and pH(T) or A(T) and pH(T) agree with direct measurements to no better than 1%. Comparisons of measured fugacity, f(CO2) (measured), and CO2 fugacity calculated from C-T and pH(T), f(CO2) (C-T, pH(T)), indicate that the precision of f(CO2) calculations is good relative to direct measurements. In contrast, due to the extreme sensitivity of f(CO2) and [H+](T) calculations to relatively small errors in both C-T and A(T), CO2 fugacity, as well as [H+](T), calculated from C-T and A(T) are very imprecise and render comparisons with direct measurements of little use. Consequently, precise calculations of f(CO2) require the use of direct pH(T) measurements. (C) 1998 Elsevier Science B.V. X 1 1 44 scie scopus Article in Journal/Newspaper Carbonic acid Pohang University of Science and Technology (POSTECH): Open Access System for Information Sharing (OASIS) Marine Chemistry 60 1-2 63 73 |
institution |
Open Polar |
collection |
Pohang University of Science and Technology (POSTECH): Open Access System for Information Sharing (OASIS) |
op_collection_id |
ftponangunivst |
language |
English |
topic |
seawater carbon dioxide fugacity spectrophotometric pH measurements thermodynamic calculations CARBONIC-ACID DISSOCIATION-CONSTANTS PH MEASUREMENTS CONSISTENCY SYSTEM |
spellingShingle |
seawater carbon dioxide fugacity spectrophotometric pH measurements thermodynamic calculations CARBONIC-ACID DISSOCIATION-CONSTANTS PH MEASUREMENTS CONSISTENCY SYSTEM McElligott, S Byrne, RH Lee, K Wanninkhof, R Millero, FJ Feely, RA DISCRETE WATER COLUMN MEASUREMENTS OF CO2 FUGACITY AND PH(T) IN SEAWATER: A COMPARISON OF DIRECT MEASUREMENTS AND THERMODYNAMIC CALCULATIONS |
topic_facet |
seawater carbon dioxide fugacity spectrophotometric pH measurements thermodynamic calculations CARBONIC-ACID DISSOCIATION-CONSTANTS PH MEASUREMENTS CONSISTENCY SYSTEM |
description |
The NOAA Eq. Pac. CO2 system data set (similar or equal to 2500 water samples) has been evaluated to assess the internal consistency of measurements and calculations involving CO2 fugacity and pH(T). This assessment represents the first large scale field comparison of pH(T) and f(CO2) data. Comparisons of direct discrete CO2 fugacity (f(CO2)) measurements with CO2 fugacity calculated from total inorganic carbon (C-T), total alkalinity (A(T)) and spectrophotometric pH (pH(T) = -log[H+](T)) indicate that a variety of improvements are needed in the parameter measurements and thermodynamic relationships used to relate f(CO2), C-T, A(T) and pH(T) in seawater. CO2 fugacity calculated from C-T and pH(T) or A(T) and pH(T) agree with direct measurements to no better than 1%. Comparisons of measured fugacity, f(CO2) (measured), and CO2 fugacity calculated from C-T and pH(T), f(CO2) (C-T, pH(T)), indicate that the precision of f(CO2) calculations is good relative to direct measurements. In contrast, due to the extreme sensitivity of f(CO2) and [H+](T) calculations to relatively small errors in both C-T and A(T), CO2 fugacity, as well as [H+](T), calculated from C-T and A(T) are very imprecise and render comparisons with direct measurements of little use. Consequently, precise calculations of f(CO2) require the use of direct pH(T) measurements. (C) 1998 Elsevier Science B.V. X 1 1 44 scie scopus |
author2 |
환경공학부 10056383 Lee, K |
format |
Article in Journal/Newspaper |
author |
McElligott, S Byrne, RH Lee, K Wanninkhof, R Millero, FJ Feely, RA |
author_facet |
McElligott, S Byrne, RH Lee, K Wanninkhof, R Millero, FJ Feely, RA |
author_sort |
McElligott, S |
title |
DISCRETE WATER COLUMN MEASUREMENTS OF CO2 FUGACITY AND PH(T) IN SEAWATER: A COMPARISON OF DIRECT MEASUREMENTS AND THERMODYNAMIC CALCULATIONS |
title_short |
DISCRETE WATER COLUMN MEASUREMENTS OF CO2 FUGACITY AND PH(T) IN SEAWATER: A COMPARISON OF DIRECT MEASUREMENTS AND THERMODYNAMIC CALCULATIONS |
title_full |
DISCRETE WATER COLUMN MEASUREMENTS OF CO2 FUGACITY AND PH(T) IN SEAWATER: A COMPARISON OF DIRECT MEASUREMENTS AND THERMODYNAMIC CALCULATIONS |
title_fullStr |
DISCRETE WATER COLUMN MEASUREMENTS OF CO2 FUGACITY AND PH(T) IN SEAWATER: A COMPARISON OF DIRECT MEASUREMENTS AND THERMODYNAMIC CALCULATIONS |
title_full_unstemmed |
DISCRETE WATER COLUMN MEASUREMENTS OF CO2 FUGACITY AND PH(T) IN SEAWATER: A COMPARISON OF DIRECT MEASUREMENTS AND THERMODYNAMIC CALCULATIONS |
title_sort |
discrete water column measurements of co2 fugacity and ph(t) in seawater: a comparison of direct measurements and thermodynamic calculations |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
1998 |
url |
https://oasis.postech.ac.kr/handle/2014.oak/28523 https://doi.org/10.1016/S0304-4203(97)00080-7 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
MARINE CHEMISTRY 60 1-2 63 73 SCI급, SCOPUS 등재논문 SCI Chemistry, Multidisciplinary Oceanography Chemistry 0304-4203 1998-OAK-0000017800 https://oasis.postech.ac.kr/handle/2014.oak/28523 doi:10.1016/S0304-4203(97)00080-7 206 MARINE CHEMISTRY, v.60, no.1-2, pp.63 - 73 000073507500006 |
op_doi |
https://doi.org/10.1016/S0304-4203(97)00080-7 |
container_title |
Marine Chemistry |
container_volume |
60 |
container_issue |
1-2 |
container_start_page |
63 |
op_container_end_page |
73 |
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1766387995377664000 |