Intercomparison of carbonate chemistry measurements on a cruise in northwestern European shelf seas
Four carbonate system variables were measured in surface waters during a cruise aimed at investigating ocean acidification impacts traversing northwestern European shelf seas in the summer of 2011. High-resolution surface water data were collected for partial pressure of carbon dioxide ( p CO 2 usin...
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ftdoajarticles:oai:doaj.org/article:ed6be4cf09624a7c91da5ad57b613f43 2023-05-15T17:51:40+02:00 Intercomparison of carbonate chemistry measurements on a cruise in northwestern European shelf seas M. Ribas-Ribas V. M. C. Rérolle D. C. E. Bakker V. Kitidis G. A. Lee I. Brown E. P. Achterberg N. J. Hardman-Mountford T. Tyrrell 2014-08-01T00:00:00Z https://doi.org/10.5194/bg-11-4339-2014 https://doaj.org/article/ed6be4cf09624a7c91da5ad57b613f43 EN eng Copernicus Publications http://www.biogeosciences.net/11/4339/2014/bg-11-4339-2014.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-11-4339-2014 https://doaj.org/article/ed6be4cf09624a7c91da5ad57b613f43 Biogeosciences, Vol 11, Iss 16, Pp 4339-4355 (2014) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2014 ftdoajarticles https://doi.org/10.5194/bg-11-4339-2014 2022-12-31T01:54:36Z Four carbonate system variables were measured in surface waters during a cruise aimed at investigating ocean acidification impacts traversing northwestern European shelf seas in the summer of 2011. High-resolution surface water data were collected for partial pressure of carbon dioxide ( p CO 2 using two independent instruments) and pH using the total pH scale (pH T ), in addition to discrete measurements of total alkalinity and dissolved inorganic carbon. We thus overdetermined the carbonate system (four measured variables, two degrees of freedom), which allowed us to evaluate the level of agreement between the variables on a cruise whose main aim was not intercomparison, and thus where conditions were more representative of normal working conditions. Calculations of carbonate system variables from other measurements generally compared well with direct observations of the same variables (Pearson's correlation coefficient always greater than or equal to 0.94; mean residuals were similar to the respective accuracies of the measurements). We therefore conclude that four of the independent data sets of carbonate chemistry variables were of high quality. A diurnal cycle with a maximum amplitude of 41 μatm was observed in the difference between the p CO 2 values obtained by the two independent analytical p CO 2 systems, and this was partly attributed to irregular seawater flows to the equilibrator and partly to biological activity inside the seawater supply and one of the equilibrators. We discuss how these issues can be addressed to improve carbonate chemistry data quality on future research cruises. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Biogeosciences 11 16 4339 4355 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 M. Ribas-Ribas V. M. C. Rérolle D. C. E. Bakker V. Kitidis G. A. Lee I. Brown E. P. Achterberg N. J. Hardman-Mountford T. Tyrrell Intercomparison of carbonate chemistry measurements on a cruise in northwestern European shelf seas |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Four carbonate system variables were measured in surface waters during a cruise aimed at investigating ocean acidification impacts traversing northwestern European shelf seas in the summer of 2011. High-resolution surface water data were collected for partial pressure of carbon dioxide ( p CO 2 using two independent instruments) and pH using the total pH scale (pH T ), in addition to discrete measurements of total alkalinity and dissolved inorganic carbon. We thus overdetermined the carbonate system (four measured variables, two degrees of freedom), which allowed us to evaluate the level of agreement between the variables on a cruise whose main aim was not intercomparison, and thus where conditions were more representative of normal working conditions. Calculations of carbonate system variables from other measurements generally compared well with direct observations of the same variables (Pearson's correlation coefficient always greater than or equal to 0.94; mean residuals were similar to the respective accuracies of the measurements). We therefore conclude that four of the independent data sets of carbonate chemistry variables were of high quality. A diurnal cycle with a maximum amplitude of 41 μatm was observed in the difference between the p CO 2 values obtained by the two independent analytical p CO 2 systems, and this was partly attributed to irregular seawater flows to the equilibrator and partly to biological activity inside the seawater supply and one of the equilibrators. We discuss how these issues can be addressed to improve carbonate chemistry data quality on future research cruises. |
format |
Article in Journal/Newspaper |
author |
M. Ribas-Ribas V. M. C. Rérolle D. C. E. Bakker V. Kitidis G. A. Lee I. Brown E. P. Achterberg N. J. Hardman-Mountford T. Tyrrell |
author_facet |
M. Ribas-Ribas V. M. C. Rérolle D. C. E. Bakker V. Kitidis G. A. Lee I. Brown E. P. Achterberg N. J. Hardman-Mountford T. Tyrrell |
author_sort |
M. Ribas-Ribas |
title |
Intercomparison of carbonate chemistry measurements on a cruise in northwestern European shelf seas |
title_short |
Intercomparison of carbonate chemistry measurements on a cruise in northwestern European shelf seas |
title_full |
Intercomparison of carbonate chemistry measurements on a cruise in northwestern European shelf seas |
title_fullStr |
Intercomparison of carbonate chemistry measurements on a cruise in northwestern European shelf seas |
title_full_unstemmed |
Intercomparison of carbonate chemistry measurements on a cruise in northwestern European shelf seas |
title_sort |
intercomparison of carbonate chemistry measurements on a cruise in northwestern european shelf seas |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/bg-11-4339-2014 https://doaj.org/article/ed6be4cf09624a7c91da5ad57b613f43 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Biogeosciences, Vol 11, Iss 16, Pp 4339-4355 (2014) |
op_relation |
http://www.biogeosciences.net/11/4339/2014/bg-11-4339-2014.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-11-4339-2014 https://doaj.org/article/ed6be4cf09624a7c91da5ad57b613f43 |
op_doi |
https://doi.org/10.5194/bg-11-4339-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
16 |
container_start_page |
4339 |
op_container_end_page |
4355 |
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1766158874715357184 |